# Exterior Plas > Exterior Plas is a family-run window and door manufacturer and installer based in Thornwood, Epping, Essex, founded in 1988. It designs, manufactures (in its own REHAU-approved factory), supplies, installs and maintains uPVC, aluminium, timber, heritage and fire-rated windows and doors for councils, housing associations, schools, businesses and homeowners across London, Essex and the South East. Key facts: - Founded 1988 by Andy Sheen; family-run; over 30 years' experience; in-house manufacturing factory in Thornwood, Epping. - Address: Weald Hall Lane, Thornwood, Epping, Essex CM16 6NR | Phone: 01992 578 903 | Email: enquiries@exteriorplas.com | Mon–Fri 9am–5pm. - Areas served: London, Essex and the South East. - Accreditations: FENSA, BFRC, Constructionline, CHAS, Cyber Essentials, Safe Contractor Approved, FIRAS, BSI Doors, Made in Britain; REHAU fabricator. - Full detailed version for AI systems: https://exteriorplas.co.uk/llms-full.txt ## Company - [Exterior Plas – Windows, Doors & Commercial Glazing in London & Essex](https://exteriorplas.co.uk/): Family-run company founded over 30 years ago that manufactures and installs uPVC, aluminium and timber windows and doors (including bi-folds) for commercial, educational and residential properties in London and the South East, plus heritage/specialist glazing, repairs and reactive maintenance. - [About Exterior Plas](https://exteriorplas.co.uk/about-us/): Founded in 1988 and based in Epping, Essex, Exterior Plas supplies windows and doors across London and the South East, mainly for councils, housing associations and the education sector, plus domestic work and trade supply. - [Our Window Manufacturing Factory](https://exteriorplas.co.uk/our-factory/): Covers the roughly 15,000 sq ft window manufacturing factory with state-of-the-art machinery including a CNC machine for accuracy and turnaround. - [Meet the Team](https://exteriorplas.co.uk/meet-the-team/): Introduces the Exterior Plas team from Directors to Manufacturing, listed by division: Operations, Estimating & Surveying, Installation & Site Management, Processing & Manufacture, Reactive Maintenance, Finance, and Software & IT. - [Contact Exterior Plas](https://exteriorplas.co.uk/contact/): Contact page: phone 01992 578 903, email enquiries@exteriorplas.com, showroom at Weald Hall Lane, Thornwood, Epping CM16 6NR. Lines open Monday–Friday 9am–5pm. - [Health & Safety](https://exteriorplas.co.uk/health-safety/): Covers the health and safety approach: managers extensively H&S trained with refresher courses, yearly training for installers and engineers, minimum green CSCS card requirement, and RAMS sign-off through its MYAGS app. - [IT Support & AGS Workflow System](https://exteriorplas.co.uk/it-support/): Covers Exterior Plas's IT services: round-the-clock infrastructure monitoring, managed backup and disaster recovery planning, and ESET managed antivirus. ## Windows - [Windows Manufacture & Installation in London & Essex](https://exteriorplas.co.uk/windows/): Windows hub: aluminium, timber and uPVC windows manufactured and installed in London and Essex, with links to a free quote and showroom visit. - [Professional uPVC Windows in Essex](https://exteriorplas.co.uk/windows/upvc-windows/): Made-to-measure uPVC windows fabricated at the company's UK factory and installed in Essex, using REHAU systems; range covers casement and tilt-and-turn windows, doors and conservatories in various colours and finishes, with a warranty. - [Best uPVC Windows Manufacture & Installation in London](https://exteriorplas.co.uk/windows/upvc-windows-london/): London uPVC window manufacturer, supplier and installer using REHAU systems, with over 30 years' experience and in-house fabrication. - [Top Aluminium Windows Manufacture & Installation in Essex](https://exteriorplas.co.uk/windows/aluminium-windows/): Aluminium windows and doors manufactured, supplied and installed for domestic and commercial clients in Essex by a company with over 30 years' experience, in casement, bi-folding and sliding styles (standard and custom). - [Top Aluminium Windows Manufacture & Installation London](https://exteriorplas.co.uk/windows/aluminium-windows-london/): Made-to-measure aluminium windows manufactured, supplied and installed for residential and commercial properties in London by a company with over 30 years' experience. - [Expert Timber Windows Installation Essex](https://exteriorplas.co.uk/windows/timber-windows/): Custom-made timber-glazed windows and doors in Essex, engineered timber built to the Wood Window Alliance standard; 30-year rot, 10-year manufacturing/materials and 8-year surface finish warranties, FENSA and Building Regulations compliant, FSC/PEFC-sourced timber. - [Timber Windows Manufacture & Installation Services in London](https://exteriorplas.co.uk/windows/timber-windows-in-london/): Bespoke timber-glazed windows manufactured and installed for modern homes, heritage buildings and businesses in London, using engineered redwood from FSC/PEFC-accredited European forests; 30-year rot, 10-year manufacturing/materials and 8-year factory finish warranties. - [Heritage Windows Manufacture & Installation in Essex](https://exteriorplas.co.uk/windows/heritage-windows/): Made-to-measure uPVC sliding sash windows that mimic traditional timber sashes for listed and conservation-area properties in Essex, from a company with over 30 years' experience. - [Heritage Windows Manufacture & Installation in London](https://exteriorplas.co.uk/windows/heritage-windows-london/): Heritage windows in London: Georgian, Edwardian and Victorian sliding sash styles plus bespoke uPVC sliding sash versions, with experience in aluminium and uPVC frames and double glazing as an option. - [Secondary Glazing Windows Provider in London & Essex](https://exteriorplas.co.uk/windows/secondary-glazing-windows/): Secondary glazing (an internal second window on the room side of an existing window) using a lightweight aluminium system fitted in the reveals or face fixed, with toughened safety glass as standard. - [Top Double Glazed Windows and Doors in Essex](https://exteriorplas.co.uk/windows/double-glazed-windows-and-doors-in-essex/): Double glazed windows and doors in Essex with expert installation, including uPVC windows on REHAU systems meeting BS7412 and BSI standards for wind, water and air; also mentions conservatories. - [Double Glazed Windows and Doors in London](https://exteriorplas.co.uk/windows/double-glazed-windows-and-doors-in-london/): Double glazed windows and doors for residential and commercial properties in London, including period properties and commercial sites with installation scheduled around trading hours. - [Rehau Heritage Vertical Slider Operation](https://exteriorplas.co.uk/rehau-heritage-vertical-slider-operation/): How REHAU Heritage vertical sliding (sash) windows operate – opening mechanism and key features. ## Doors - [Doors Manufacture & Installation Services in London & Essex](https://exteriorplas.co.uk/doors/): Door range hub: uPVC, composite, bi-fold, aluminium and timber doors manufactured and installed across Essex and London. - [uPVC Doors Manufacture & Installation in Essex](https://exteriorplas.co.uk/doors/upvc-doors/): Supplied and fitted uPVC front, rear and French doors for homes and businesses in Essex, in white, woodgrain and anthracite grey, with moulded panels and bespoke coloured-lead glass designs and a range of handles, hinges and locking mechanisms. - [uPVC Doors Manufacture & Installation in London](https://exteriorplas.co.uk/doors/upvc-doors-london/): Exterior Plas designs, supplies and installs uPVC doors for residential and commercial properties in London, with over 30 years' experience; multi-point locking, reinforced frames, toughened glass and custom colour matching. Accreditations include FENSA, BFRC, CHAS, Cyber Essentials and BSI Doors. - [Composite Doors Manufacture & Installation Services](https://exteriorplas.co.uk/doors/composite-doors/): Essex manufacturer (since 1988) selling pre-built and bespoke composite doors with solid timber core and GRP woodgrain skin, installed for residential, commercial and educational properties in Essex and nearby; multi-point locking standard. - [Composite Doors Manufacture & Installation Services London](https://exteriorplas.co.uk/doors/composite-doors-london/): Pre-built and bespoke composite doors manufactured at the Essex facility and installed across London and the South East for homes, businesses, schools and housing groups; U-value 0.98-1.4 W/m²K, GRP woodgrain finish in many colours, lead or bevelled glass, multi-point locking. - [Premium Aluminium Doors Installation in Essex](https://exteriorplas.co.uk/doors/aluminium-doors/): Bespoke aluminium doors manufactured and installed for Essex and nearby areas in an extensive range of configurations, styles and single or dual colours; highlights strength, durability and thermal performance. - [Expert Aluminium Door Manufacture & Fitting London](https://exteriorplas.co.uk/doors/aluminium-doors-london/): Essex-based manufacturer/installer offering made-to-measure aluminium doors, including bi-fold and sliding styles, for London homes and businesses; mentions powder-coated finishes and thermal breaks in newer designs. - [Bi-Fold Doors Manufacture & Installation Services Essex](https://exteriorplas.co.uk/doors/bi-fold-doors/): Epping-based Exterior Plas makes and installs bi-fold doors in aluminium, uPVC and timber in a range of colours/finishes for Essex, London and the wider South East; built in-house to measured specs, typically half to a full day to install. - [Bi-Fold Doors Installation & Fitting Services in London](https://exteriorplas.co.uk/doors/bi-fold-doors-london/): Manufacture, fitting and installation of custom bi-fold doors in London in a range of materials and finishes, with a free quote option. - [Premium Timber Doors Manufacture & Installation in Essex](https://exteriorplas.co.uk/doors/timber-doors/): Made-to-measure, factory-finished timber doors in contemporary or traditional designs, manufactured and installed in Essex, using engineered redwood and FSC/PEFC hardwoods to a Wood Window Alliance standard (EUTR and CITES compliant). - [High Quality Timber Doors Manufacture and Supplier in London](https://exteriorplas.co.uk/doors/timber-doors-london/): Bespoke solid timber doors (front, exterior and pre-hung internal) in contemporary or traditional styles, guaranteed against rot and fungus, with service from survey to installation. - [Double Glazed Windows and Doors in London](https://exteriorplas.co.uk/doors/double-glazing-companies-london/): Supply and installation of double glazed windows and doors for London residential and commercial properties, with free site surveys, multi-point locking as standard, optional toughened glass, and commercial work scheduled around trading hours. ## Fire Safety Products - [Fire Safety Products Installation Services in London & Essex](https://exteriorplas.co.uk/fire-products/): Fire safety product installation in London and Essex using current construction techniques and fire-rated materials; sections for BM Trada and Fire Doors. - [Fire Resistant Doors Manufacture & Installer London & Essex](https://exteriorplas.co.uk/fire-products/fire-doors/): Fire doors in timber and GRP in multiple design options; the company says it has developed and manufactured its own fire doors and windows. - [Fire Rated Windows in London and Essex](https://exteriorplas.co.uk/fire-products/fire-rated/): Fire-resistant PVC-U windows based on the REHAU TOTAL70 70mm profile, stated to meet BS476 Parts 20 and 22 for protected areas; also thermal/sound benefits, low maintenance and security options. - [BM Trada Certified Fire Exit Doors Installation Services](https://exteriorplas.co.uk/fire-products/bm-trada/): Fire door installation, fire door maintenance and fire stopping installation under BM Trada Q-Mark schemes. ## Repairs, Maintenance & Roofing - [Expert Reactive Window Maintenance in the London & Essex](https://exteriorplas.co.uk/reactive-maintenance/): Reactive repairs for windows, doors and glazing across London and the South East, from ad hoc contracts to borough-wide frameworks, plus cyclical maintenance programmes and private repairs; cites a first-time fix rate over 70%. - [Reactive Window Maintenance in London](https://exteriorplas.co.uk/reactive-maintenance-london/): Ad hoc and framework repairs plus yearly preventive maintenance for windows and doors across London and the South East, serving councils, housing associations, education and private clients; offers glass upgrades (noise reduction, easier cleaning). - [Commercial & Residential Roofing Services in London & Essex](https://exteriorplas.co.uk/roofing/): Roofing repairs, refurbishments and new projects for residential and commercial properties by fully qualified and certified roofing contractors. ## Projects & Galleries - [Residential Gallery](https://exteriorplas.co.uk/residential-gallery/): Gallery of three residential projects: a roof glass and bifold installation in Buckhurst Hill, uPVC Sawbo bifold doors, and a Theydon bifold door and roof light project. - [Commercial Gallery](https://exteriorplas.co.uk/commercial-gallery/): Gallery of commercial window and door projects in Essex and London, including offices, residential flats, a pub and schools, some labelled heritage, timber or uPVC. ## Community & Sustainability - [Environment & Recycling](https://exteriorplas.co.uk/environment/): Environmental commitment: recycling uPVC, aluminium and glass from removed windows and doors (uPVC ground into pellets and reused), with as little as 0.6% of monthly waste going to landfill. - [Environmental Statement](https://exteriorplas.co.uk/environmental-statement/): Environmental policy of Exterior Plas (window and door manufacturer/installer in Essex and London) committing to reducing waste, preventing pollution and legislative compliance, with Directors holding overall responsibility. - [Charity & Community Fundraising](https://exteriorplas.co.uk/charity/): Showcases eight charity fundraising/awareness initiatives, including a Macmillan coffee morning, Save The Children Christmas Jumper Day, a Help For Heroes presentation and a Kilimanjaro fundraising challenge. - [Sponsored Local Teams](https://exteriorplas.co.uk/sponsorship/): Local sponsorship of three youth football teams: Brimsdown Rovers, Cougars Under 10's and Redwings Under 11's; the company describes itself as a window and door manufacturer and installer throughout Essex, London and the South East. ## Guides & Blog ### Window Guides - [What to Expect with uPVC Windows for Your Home?](https://exteriorplas.co.uk/what-happens-when-you-choose-upvc-windows-manufacturer-for-your-home/): Covers Exterior Plas as a REHAU-approved uPVC window manufacturer offering durable, energy-efficient, low-maintenance windows in London and Essex. - [Redefining style with custom uPVC windows in London](https://exteriorplas.co.uk/how-local-manufacturers-are-redefining-style-with-upvc-windows/): Explains that custom uPVC windows are popular in London for tailored designs, energy efficiency and noise reduction, highlighting local manufacturers' faster turnaround and knowledge of London homes. - [5 Key Benefits of uPVC Windows & Doors](https://exteriorplas.co.uk/5-advantages-of-upvc-windows-and-doors/): Covers five benefits of uPVC windows and doors: energy efficiency, low maintenance, durability, security and affordability, and invites readers to book a free quote. - [5 Reasons uPVC Windows Are So Popular](https://exteriorplas.co.uk/5-reasons-upvc-windows-are-so-popular/): Lists five advantages of uPVC windows: heat retention, strong security, longevity, easy upkeep and recyclability. - [uPVC Windows And Doors - Myth busters](https://exteriorplas.co.uk/upvc-windows-and-doors-myth-busters/): Addresses common misconceptions about uPVC windows and doors (maintenance, cost, durability, fire safety, environmental impact, condensation) with the company's counterpoint to each. - [Why Choose Chamfered Edge uPVC Installations](https://exteriorplas.co.uk/why-choose-chamfered-edge-upvc-installations/): Compares chamfered uPVC window profiles (straight, clean, modern edges) with Ovolo profiles (sculpted, traditional, suited to period properties). - [uPVC Installation To Improve Your Home](https://exteriorplas.co.uk/upvc-installation-to-improve-your-home/): Covers Exterior Plas uPVC windows as durable, energy-saving and low-maintenance, reducing noise and heat loss and lowering environmental impact. - [uPVC Windows & Installations Save You Money](https://exteriorplas.co.uk/upvc-windows-installations-save-you-money/): Covers energy-efficient uPVC windows that the company says can help lower energy bills and suit a range of homes. - [4 Benefits of Aluminium Window Installation](https://exteriorplas.co.uk/4-reasons-you-should-invest-in-aluminium-windows-installation/): Covers aluminium windows as a practical choice for London homes, citing strength, modern appearance, energy savings from a thermal break and low maintenance. - [Aluminium Windows And Doors - 5 Reasons For](https://exteriorplas.co.uk/5-reasons-you-need-new-aluminium-windows-and-doors/): Covers aluminium as a strong choice for windows and doors: resistance to harsh weather, energy savings from heat-reducing glazing, low upkeep, insect and fire resistance, and security features. - [Aluminium Doors And Windows - Modern Design](https://exteriorplas.co.uk/modern-building-design-with-aluminium-doors-and-windows/): Explains that aluminium windows and doors suit modern homes because they admit more light, insulate well to lower energy costs, and are durable, customisable, low-maintenance and recyclable. - [Double-Glazing Heritage Window Regulations London](https://exteriorplas.co.uk/building-codes-for-double-glazing-heritage-windows-london/): Discusses how Building Regulations Part L and U-value standards apply to upgrading heritage windows in London. - [Heritage Windows: Preserving London's Historic Charm](https://exteriorplas.co.uk/why-choose-heritage-windows-a-look-at-the-historical-and-architectural-significance-of-london/): Explains that heritage windows help preserve London's historical and architectural character, covering period styles, energy-efficiency upgrades and conservation rules. - [Transform Your Home with Heritage Windows](https://exteriorplas.co.uk/how-to-transform-a-home-with-heritage-windows-installation/): Explains that heritage windows can improve period homes in Essex through energy efficiency, preserved architectural character, styling options, added security and curb appeal. - [Triple Glazing Windows](https://exteriorplas.co.uk/triple-glazing-windows-why-your-home-and-wallet-could-benefit-from-them/): Explains triple glazing uses three panes of glass to reduce noise and improve energy efficiency, helping offset rising heating bills. - [Winter Ready Windows](https://exteriorplas.co.uk/winter-ready-windows/): Explains older single-glazed windows lose more heat and insulate less against sound than double or triple glazing. - [How Double Glazing Boosts Your London Property Value](https://exteriorplas.co.uk/how-double-glazing-adds-value-to-your-london-property/): Explains that double glazing can raise a London home's value by improving energy efficiency, reducing noise, strengthening security and enhancing curb appeal. - [Why Homeowners Choose Double Glazing for Energy Efficiency](https://exteriorplas.co.uk/why-homeowners-in-london-are-turning-to-local-double-glazing-companies-for-energy-efficiency/): Explains that London homeowners choose local double glazing companies to cut heat loss, lower energy bills, reduce noise and lessen their carbon footprint. - [Five Window Facts You Never Knew](https://exteriorplas.co.uk/five-window-facts-you-never-knew/): Covers five window facts: early glass windows, 1870s double glazing in Scotland, possible home value gains from new windows, typical window counts in UK homes, and skylights admitting more light than vertical windows. - [Trade Window Supplier & Manufacturing](https://exteriorplas.co.uk/trade-window-supplier-manufacturing/): Family-run Epping, Essex business promoting made-to-measure uPVC and aluminium windows manufactured in its own factory, with no minimum order and clear upfront costs. - [PVC-U & Sustainability - Uncovering The Truth](https://exteriorplas.co.uk/pvc-u-sustainability-uncovering-the-truth/): Explains that PVC-U is durable, low-maintenance, recyclable and comparatively sustainable, citing a 35-year service life, UK recycling schemes and lower oil use than steel or aluminium. ### Door Guides - [What Front Door Should I Buy?](https://exteriorplas.co.uk/what-front-door-should-i-buy/): Compares four front door types (uPVC, composite, aluminium, timber) on security, thermal performance, upkeep, appearance and value. - [What Homeowners Need to Know About Composite Doors](https://exteriorplas.co.uk/composite-front-doors-supply-and-fit-in-essex/): Explains how composite front doors are supplied and fitted in Essex, highlighting security, insulation and durability. - [Things to Know Before Picking a Composite Door Supplier](https://exteriorplas.co.uk/things-you-should-consider-before-contacting-a-composite-door-supplier/): Explains that composite doors have a timber core wrapped in protective layers such as uPVC, laminate or GRP, making them durable, insulating, secure and low-maintenance. - [How to Fix 4 Common Composite Door Problems](https://exteriorplas.co.uk/4-common-problems-with-composite-doors-and-how-to-fix-them/): Covers four common composite door problems: warping/bowing, fading and discolouration, locking mechanism faults, and condensation between panes. - [Composite or Wooden Doors: Best for Period Homes?](https://exteriorplas.co.uk/are-composite-front-doors-a-better-alternative-to-wooden-doors-for-period-properties/): Compares composite and timber front doors for period properties on strength, authenticity, energy efficiency, security, durability and cost. - [Benefits of Choosing uPVC Doors in London](https://exteriorplas.co.uk/5-reasons-why-upvc-doors-are-ideal-for-london-homes/): Gives five reasons uPVC doors suit London homes: insulation against the weather, noise reduction, security (reinforced cores, multi-point locks), low maintenance and modern design options, then outlines Exterior Plas's manufacturing and installation. - [Why UPVC Doors Offer Superior Protection for London Homes](https://exteriorplas.co.uk/why-upvc-doors-offer-superior-protection-for-london-homes/): Explains that uPVC front doors suit London homes because they offer strong security, fire and weather resistance, energy savings and a long lifespan with little upkeep, and recommends a local supplier and fitter. - [Guide to Hiring Aluminium Door Manufacturers in London](https://exteriorplas.co.uk/experienced-aluminium-door-manufacturers-in-london-what-to-know-before-you-hire/): Advises on choosing an aluminium door manufacturer in London: material quality, customisation, certifications, in-house manufacturing, installation and aftercare. - [The Top Benefits of Aluminium Doors](https://exteriorplas.co.uk/the-top-benefits-of-aluminium-doors/): Covers aluminium doors as durable, low-maintenance, energy-efficient, stylish, secure and recyclable, and notes their suitability for many door types and home styles. - [Boost Home Insulation with Aluminium Door Installation](https://exteriorplas.co.uk/boost-home-insulation-with-expert-aluminium-door-installation/): Explains that aluminium doors improve home insulation through thermal breaks, tight professional fitting with weatherproof seals, double glazing and durability, helping keep indoor temperatures steady and reduce heating and cooling costs. - [Bi fold Doors - 6 Top Tips You Need To Know](https://exteriorplas.co.uk/top-6-things-you-need-to-know-about-bi-fold-doors/): Outlines six bi-fold door considerations: materials (uPVC, aluminium, timber), panel count, track types, multi-point locking, and weatherproofing with U-value and BS 6375 Part 1 standards. - [Bifold Doors: Do They Add Value? Essex Experts Explain](https://exteriorplas.co.uk/do-bifold-doors-add-value-to-your-home-insights-from-essex-experts/): Explains that bifold doors can add value through more natural light, better space flow and style, citing potential value increases of up to 10% (5–10%). - [Bifold vs. Sliding Aluminium Doors: Best Choice for You?](https://exteriorplas.co.uk/bifold-vs-aluminium-doors-which-one-is-best-choice-for-you/): Compares bifold and sliding aluminium doors on space, views, energy efficiency, maintenance, cost and security. - [Bi-Fold Doors vs. Traditional Patio Doors](https://exteriorplas.co.uk/bi-fold-doors-vs-traditional-patio-doors/): Compares bi-fold and traditional patio doors for Essex homes on space, style, light and views, cost and installation, and energy efficiency. - [uPVC Bi-Fold Doors for Summer](https://exteriorplas.co.uk/upvc-bi-fold-doors-plan-yours-for-the-summer/): Covers uPVC bi-fold doors as a way to link a home with its garden, noting Exterior Plas offers several configurations and that bi-folds come in aluminium, uPVC and timber in various colours and finishes. - [Acoustic Glazed Doors in London & Essex: Benefits & Cost](https://exteriorplas.co.uk/an-intro-to-acoustic-glazed-doors-in-london-and-essex-benefits-options-and-cost/): Explains that acoustic glazed doors use laminated acoustic glass to reduce outside noise, covering soundproofing levels and frameless/framed design options. - [Transform Your Home: Top Timber Door Styles in Essex 2025](https://exteriorplas.co.uk/top-timber-door-styles-in-essex-2025/): Covers timber door styles expected to be popular in Essex in 2025: rustic, sleek minimalist, panelled, glass-accent and double doors. - [Why Choose Timber Doors?](https://exteriorplas.co.uk/why-choose-timber-doors/): Covers factory-finished timber doors with a 30-year rot warranty, 10-year manufacturing/materials warranty and 8-year surface finish warranty. - [Benefits Of Engineered Timber Doors](https://exteriorplas.co.uk/benefits-of-engineered-timber-doors/): Explains that engineered timber doors add property value and lists benefits: sustainability, character, traditional and contemporary designs, sturdiness and security, and low maintenance with resistance to discoloration and rot. - [Heat Loss Through Doors](https://exteriorplas.co.uk/heat-loss-through-doors/): Estimates UK homes lose 10-20% of heat through windows and external doors and suggests caulking door frames and draught excluders as quick fixes. - [Is Your House Door Wreath Ready?](https://exteriorplas.co.uk/is-your-house-door-wreath-ready/): Covers uPVC, composite, aluminium and timber house doors, noting durability, energy efficiency and range of styles, and encourages choosing a door that fits the home. ### Energy Efficiency, Skylights & Extensions - [Improve Your Home's EPC Rating](https://exteriorplas.co.uk/improve-your-homes-epc-rating/): Explains that EPC ratings grade a home's energy efficiency from A (most efficient) to G (least). - [Windows And Doors Letting Out Heat?](https://exteriorplas.co.uk/windows-and-doors-letting-out-heat/): Explains that old windows and doors are a major source of home heat loss and higher energy costs, recommending energy-efficient uPVC windows or well-sealed uPVC, composite or timber doors. - [How to Stop Your New Extension Overheating](https://exteriorplas.co.uk/the-glass-box-effect-how-to-stop-your-new-extension-from-overheating/): Explains that large glass extensions overheat due to solar gain and recommends solar control glass, tinted roof glazing and integral blinds. - [Benefits Of Skylights](https://exteriorplas.co.uk/benefits-of-skylights/): Says well-placed, properly installed skylights (roof lights) bring natural warmth and daylight into a home in winter, which may lower energy bills. - [Stunning Skylights Transform Homes](https://exteriorplas.co.uk/stunning-skylights-transform-homes/): Covers skylights to add daylight and make rooms feel brighter and more spacious, with options for kitchens and living rooms. - [New Windows & Doors To Improve Your View](https://exteriorplas.co.uk/new-windows-doors-to-improve-your-view/): Suggests new windows and doors to refresh a home, citing added security, natural light and curb appeal. ### Maintenance Guides - [Reactive Window Maintenance in London for Listed Homes](https://exteriorplas.co.uk/why-reactive-window-maintenance-in-london-is-essential-for-heritage-and-listed-buildings/): Explains that historic windows in London's heritage and listed buildings need specialist reactive maintenance because heritage rules prevent simple replacement. - [Autumn Care for Windows & Doors in London and Essex](https://exteriorplas.co.uk/autumn-window-and-door-maintenance/): Explains why autumn checks on windows and doors matter for London and Essex homes, including draughts, condensation, and seal and hinge problems, and outlines Exterior Plas's professional maintenance service. - [Benefits Of A Cyclical Maintenance Programme](https://exteriorplas.co.uk/benefits-of-a-cyclical-maintenance-programme/): Explains that yearly inspections and minor adjustments via a cyclical maintenance programme are the most effective way to extend window and door service life. - [5 Essential Care Tips for Wooden Windows & Doors](https://exteriorplas.co.uk/5-care-and-maintenance-tips-for-wooden-windows-and-doors/): Explains that neglected timber windows and doors can warp, crack and wear early. ### Commercial & Education Glazing - [Top Reasons To Use Commercial Window Installers in Essex](https://exteriorplas.co.uk/top-reasons-to-use-commercial-window-installers-in-essex/): Lists warning signs that glazing needs repair or replacement, including cracked panes, fogging between layered glass and weakened wooden frames, and advises contacting commercial window installers in Essex for an inspection. - [Commercial Glazing For Your Shop Front](https://exteriorplas.co.uk/commercial-glazing-for-your-shop-front/): Covers commercial shop-front glazing that the company says adds character and improves a business's appearance; also covers double-glazed shopfronts for security and insulation installed in Essex and London. - [Commercial Shopfront Glazing Specialists](https://exteriorplas.co.uk/commercial-glazing-specialists-for-stylish-shopfronts/): Explains how updating window frame designs can help a shop attract passersby, and offers Exterior Plas bespoke commercial window solutions across London and the South East with a free quote. - [School Windows Help Academic Success](https://exteriorplas.co.uk/school-windows-help-academic-success/): Explains that daylight from new school windows can support pupils' academic performance, citing a UCL student study linking natural light to better reading and science results. - [Thermally Efficient UPVC Windows Walthamstow](https://exteriorplas.co.uk/stocksfield-estate-thermally-efficient-upvc-windows/): Exterior Plas replaced the windows in all 206 flats at Stocksfield Estate, Walthamstow, for client Morgan Sindall, swapping aging, draughty tilt-and-turn units for thermally efficient uPVC H-swing and casement windows. ### Customer Reviews - [Conservatory Review](https://exteriorplas.co.uk/conservatory-review/): Customer review by Elaine Bates praising the conservatory team as professional, polite and helpful, cleaning up daily with minimal disruption. - [Installation Review](https://exteriorplas.co.uk/installation-review/): Customer review crediting a helpful surveyor, a prompt and fairly priced quote, and installation work that was checked afterward. - [Windows & Doors - The Whole Package!](https://exteriorplas.co.uk/windows-doors-the-whole-package/): Testimonial from Michele Bolton, who had every window and door in her three-bed home replaced under council arrangements and praised the fitters' speed, tidiness and complete parts. - ["First Class Job!"](https://exteriorplas.co.uk/first-class-job/): Customer review from Jackie Woodrow praising Exterior Plas for replacing all windows in her home, describing installers as respectful, professional and polite. ### Company News - [UN Global Impact](https://exteriorplas.co.uk/un-global-impact/): Exterior Plas says it follows the UN Global Compact, which asks companies to align operations with principles on human rights, labour, environment and anti-corruption. - [Salvation Army Toy Collection](https://exteriorplas.co.uk/salvation-army-toy-collection/): Exterior Plas staff collected Christmas gifts and toys for the Salvation Army to distribute to local children. - [Christmas Jumper Day](https://exteriorplas.co.uk/christmas-jumper-day/): Exterior Plas staff raised money for Save the Children on Christmas Jumper Day, rising from £130 in 2018 to £420 in 2019 via a 'Play Your Cards Right' themed event and buffet lunch. ## Optional - [News & Blog](https://exteriorplas.co.uk/news/): Index of Exterior Plas news articles and buying guides on windows, doors, heritage glazing and maintenance in London and Essex. - [Health & Safety Policy](https://exteriorplas.co.uk/health-safety-policy/): Exterior Plas Ltd health and safety policy under the Health and Safety at Work etc. Act 1974, covering employees, contractors and the public; the Managing Director holds overall responsibility. - [Terms & Conditions](https://exteriorplas.co.uk/terms-conditions/): Terms and conditions for Exterior Plas products and services. - [Privacy Policy](https://exteriorplas.co.uk/privacy-policy/): How Exterior Plas collects, uses and shares visitor and customer information, including cookies, analytics and advertising opt-outs. - [HTML Sitemap](https://exteriorplas.co.uk/sitemap/): HTML sitemap listing every page and blog post on the site.