--- title: "uPVC & Aluminium Windows in Chelmsford | Fitted & Guaranteed" description: "A-rated uPVC and slim aluminium windows supplied and fitted across Chelmsford. Free survey, written quote, 10-year guarantee and Certass-covered fitting teams." lang: en-GB json-ld: | [ { "@context": "https://schema.org", "@graph": [ { "@type": "Service", "@id": "https://www.bifoldsdirectessex.co.uk/upvc-aluminium-windows-chelmsford/#service", "name": "uPVC and aluminium window installation in Chelmsford", "serviceType": "Window installation", "provider": { "@id": "https://www.bifoldsdirectessex.co.uk/#org" }, "areaServed": { "@type": "City", "name": "Chelmsford", "addressRegion": "Essex", "addressCountry": "GB" }, "url": "https://www.bifoldsdirectessex.co.uk/upvc-aluminium-windows-chelmsford/", "description": "Supply and installation of A-rated uPVC and thermally broken aluminium windows for homes across Chelmsford and the surrounding villages." }, { "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "Should I choose uPVC or aluminium windows for a Chelmsford home?", "acceptedAnswer": { "@type": "Answer", "text": "uPVC gives the best thermal performance for the money and suits most estate housing across Chelmsford, Springfield and Beaulieu Park. Aluminium gives far slimmer sightlines, more glass and a sharper look, and is the usual choice for extensions, large openings and contemporary renovations. Many homeowners mix the two — uPVC on the standard casements, aluminium on the feature elevation." } }, { "@type": "Question", "name": "Do replacement windows in Chelmsford need Building Regulations approval?", "acceptedAnswer": { "@type": "Answer", "text": "Yes. Replacement windows must meet Part L thermal standards and Part F ventilation requirements. The work is either self-certified under a competent-person scheme or notified to Chelmsford City Council Building Control. Conservation areas and listed buildings in the city centre and surrounding villages have additional requirements we check at survey." } }, { "@type": "Question", "name": "How long does a full house of windows take to fit?", "acceptedAnswer": { "@type": "Answer", "text": "A typical three-bedroom Chelmsford semi is one to two days for a complete set. Larger detached properties run two to three days. Manufacturing lead time after survey is usually a few weeks depending on frame material and colour." } }, { "@type": "Question", "name": "What colours can I have?", "acceptedAnswer": { "@type": "Answer", "text": "Anthracite grey (RAL 7016) outside with white inside is the most requested combination we fit in Chelmsford. Aluminium is available in the full RAL range including dual-colour, and uPVC comes in white, greys, black, cream and woodgrain foils." } }, { "@type": "Question", "name": "Do you fit windows in conservation areas?", "acceptedAnswer": { "@type": "Answer", "text": "Yes, subject to the relevant consents. Chelmsford has several conservation areas where frame material, sightlines and opening style may be controlled. We identify what applies at survey and specify accordingly rather than fitting something that has to come back out." } }, { "@type": "Question", "name": "Are trickle vents compulsory now?", "acceptedAnswer": { "@type": "Answer", "text": "In most replacement situations, yes — Part F requires background ventilation to be maintained or improved when windows are replaced. We include them in the specification and quote rather than adding them later." } } ] } ] }, { "@context": "https://schema.org", "@graph": [ { "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://www.bifoldsdirectessex.co.uk/" }, { "@type": "ListItem", "position": 2, "name": "Glazing & Windows", "item": "https://www.bifoldsdirectessex.co.uk/glazing-essex/" }, { "@type": "ListItem", "position": 3, "name": "Windows in Chelmsford", "item": "https://www.bifoldsdirectessex.co.uk/upvc-aluminium-windows-chelmsford/" } ] } ] } ] --- We use essential cookies to run this site and, with your consent, analytics cookies to measure enquiries. [Cookie Policy](/cookie-policy/) AcceptReject [![Bi Folds & Windows Direct of Essex logo](/assets/bde-logo-DjJb1e2T.png)](/) Services Areas [About](/about/)[Our Work](/our-work/)[Reviews](/reviews/)[Contact](/contact/) [07903 632039](tel:+447903632039)[Get a Free Quote](/contact/) Summer Offer Bi-folding doors **£680 per panel** [Get a free quote](/contact/) 1. [Home](/) 2. [Glazing & Windows](/glazing-essex/) 3. Windows in Chelmsford ![](/assets/hero-aluminium-windows-DsL9Py-7.jpg) Chelmsford · Windows # uPVC and aluminium windows in Chelmsford Family-run, Essex-based, fitting A-rated uPVC and thermally broken aluminium windows across Chelmsford — from Victorian terraces in Moulsham to new-build homes in Beaulieu Park. Chelmsford has an unusually wide mix of housing for a single city, and that mix is the reason there is no single right window for it. The Victorian and Edwardian terraces around Moulsham Street and New London Road need proportion and sightlines handled sympathetically. The inter-war and post-war semis across Springfield, Great Baddow and Writtle Road are the classic replacement job — tired 1990s uPVC coming out, A-rated frames going in. Newer estates at Beaulieu Park and Channels are already double-glazed, so the work there is usually an aluminium upgrade on an extension or a bi-fold opening rather than a full replacement. We are a family-run installer working across Essex, Hertfordshire and Kent, and Chelmsford is our closest and busiest patch. Everything is measured, manufactured to size and fitted by our own team — no subcontracted fitters, no commission salespeople, and a 10-year guarantee on products and installation. Choosing ## uPVC or aluminium — which suits your Chelmsford home? ### A-rated uPVC windows The value choice, and the right answer for most standard housing stock. Modern multi-chamber profiles with steel reinforcement deliver whole-window U-values around 1.2–1.4 W/m²K, against 2.8–3.2 W/m²K for the 1990s units they usually replace. Available in white, anthracite grey, black, cream and woodgrain foils, in casement, tilt-and-turn, sash and bay configurations. - Best thermal performance per pound spent - Widest colour and style range - No painting, no rot, easy to clean - Ideal for full-house replacements ### Thermally broken aluminium windows Aluminium is far stronger than uPVC, so the frame can be much slimmer for the same opening — typically a third to a half the visible frame width. That means noticeably more glass and more daylight. Polyamide thermal breaks and argon-filled low-E glass keep performance close to uPVC, and the powder-coated finish lasts decades without repainting. - Slimmest sightlines, maximum glass area - Full RAL colour range, dual-colour available - Best for large openings and extensions - Matches aluminium bi-folds and sliders There is no obligation to pick one. A common Chelmsford specification is uPVC casements to the front and sides for cost efficiency, with slim aluminium across the rear extension so the frames match the [bi-fold doors](/bi-fold-doors-essex/). Read the wider comparison on our [aluminium windows](/aluminium-windows-essex/) and [double glazing](/double-glazing-essex/) pages. Styles ## Window styles we fit across the city ### Casement windows The standard across most of Chelmsford's housing. Side-hung or top-hung opening lights within a fixed frame, available in almost any configuration. Reliable, secure, cost-effective, and available in both materials. ### Tilt-and-turn windows Tilt inwards at the top for secure background ventilation, or swing fully inwards for cleaning. Particularly useful on first-floor and above bedrooms where reaching the outside face is otherwise a ladder job. ### Bay and bow windows Extremely common on Chelmsford's inter-war semis. Bay replacements need careful attention to the structural load above — the bay often carries the roof or a first-floor bay above it — so we survey the head detail properly rather than assuming a like-for-like swap. ### Sash windows Vertical sliding units for period terraces around Moulsham and the city centre. Modern uPVC and timber-effect sashes give authentic proportions with mechanical balances and proper weatherseals. ### Fixed and feature glazing Picture windows, shaped heads and gable glazing where daylight and view matter more than ventilation. Best thermal performance of any style, since there are no opening seals. ![Residential street of brick semi-detached houses in Chelmsford, Essex, with replacement double-glazed casement windows](/assets/3-Bxu3lJzM.jpeg) Included on every Chelmsford job - Free measured survey — quote slots 7am–8pm, seven days - Written quote with the full specification on it - A-rated glazing with argon fill and warm-edge spacers - Multi-point locking and internally beaded units - Part F trickle ventilation where required - Old frames and glass removed and recycled - 10-year guarantee, Certass-covered fitters Process ## From first call to finished install 1. 1 ### Free survey at your home We measure every opening, check the reveals, cills and lintels, look at how the existing windows have failed, and talk through materials, colours and glass options. No commission salesperson, no same-day-only pricing. 2. 2 ### Written quote Itemised, with the frame system, glass specification, hardware, colour and ventilation all stated. If we think two of your windows can wait another few years, we will say so in writing. 3. 3 ### Manufacture to size Frames are made to your surveyed dimensions. Lead time depends on material and colour and is confirmed when you order. 4. 4 ### Installation Old frames removed cleanly, new frames packed, levelled, fixed and sealed inside and out, reveals made good. A typical Chelmsford semi is one to two days for a full house. 5. 5 ### Handover and guarantee Every window operated and adjusted, keys handed over, glass cleaned, waste removed, and the 10-year guarantee plus Building Regulations paperwork issued. The full step-by-step is on our [installation process](/window-installation-process/) page, and the tell-tale signs that your existing windows have reached the end are covered in [7 signs you need new windows](/signs-you-need-new-windows/). Questions ## Chelmsford window FAQs ### Should I choose uPVC or aluminium windows for a Chelmsford home? uPVC gives the best thermal performance for the money and suits most estate housing across Chelmsford, Springfield and Beaulieu Park. Aluminium gives far slimmer sightlines, more glass and a sharper look, and is the usual choice for extensions, large openings and contemporary renovations. Many homeowners mix the two — uPVC on the standard casements, aluminium on the feature elevation. ### Do replacement windows in Chelmsford need Building Regulations approval? Yes. Replacement windows must meet Part L thermal standards and Part F ventilation requirements. The work is either self-certified under a competent-person scheme or notified to Chelmsford City Council Building Control. Conservation areas and listed buildings in the city centre and surrounding villages have additional requirements we check at survey. ### How long does a full house of windows take to fit? A typical three-bedroom Chelmsford semi is one to two days for a complete set. Larger detached properties run two to three days. Manufacturing lead time after survey is usually a few weeks depending on frame material and colour. ### What colours can I have? Anthracite grey (RAL 7016) outside with white inside is the most requested combination we fit in Chelmsford. Aluminium is available in the full RAL range including dual-colour, and uPVC comes in white, greys, black, cream and woodgrain foils. ### Do you fit windows in conservation areas? Yes, subject to the relevant consents. Chelmsford has several conservation areas where frame material, sightlines and opening style may be controlled. We identify what applies at survey and specify accordingly rather than fitting something that has to come back out. ### Are trickle vents compulsory now? In most replacement situations, yes — Part F requires background ventilation to be maintained or improved when windows are replaced. We include them in the specification and quote rather than adding them later. Nearby ## Also working across mid-Essex - [Chelmsford area page](/areas/chelmsford/) - [Bi-fold doors in Chelmsford](/bi-fold-doors-chelmsford/) - [Brentwood](/areas/brentwood/) - [Billericay](/areas/billericay/) - [Basildon](/areas/basildon/) - [Rayleigh](/areas/rayleigh/) Prefer to talk it through? [07903 632039](tel:+447903632039) ## Ready to get a straight answer on price and timeline? Free home survey, written quote, no pressure. Quote slots 7am–8pm seven days. [Request Free Quote](/contact/)[Call 07903 632039](tel:+447903632039) ![Bi Folds & Windows Direct of Essex](/assets/bde-logo-DjJb1e2T.png) Family-run installer of bi-fold doors, aluminium windows, double glazing and roof lanterns. Covering Essex and the surrounding counties with 10+ years of trade experience. [07903 632039](tel:+447903632039) [info@bifoldsdirectessex.co.uk](mailto:info@bifoldsdirectessex.co.uk) [](https://facebook.com/bifoldsdirectessex)[](https://instagram.com/bifoldsdirectessex)[](https://www.linkedin.com/company/bifolds-windows-direct/) Glazing & Windows - [Window installation Essex](/window-installation-essex/) - [Double glazing](/double-glazing-essex/) - [Aluminium windows](/aluminium-windows-essex/) - [Roof lanterns & rooflights](/roof-lanterns-essex/) - [Conservatories](/conservatories-essex/) - [All glazing services](/glazing-essex/) Doors - [Bi-fold doors Essex](/bi-fold-doors-essex/) - [Sliding doors](/sliding-doors-essex/) - [Composite doors](/composite-doors-essex/) - [Front doors](/front-doors-essex/) - [All door services](/doors-essex/) Guides - [All guides & advice](/blog/) - [Bi-folding door benefits](/bi-folding-door-benefits/) - [Summer upgrade guide](/summer-window-and-door-upgrades/) - [Aluminium vs PVC](/aluminium-vs-pvc-bifold-doors/) - [Double vs triple glazing](/double-glazing-vs-triple-glazing/) - [Window energy ratings](/window-energy-ratings-explained/) - [Signs you need new windows](/signs-you-need-new-windows/) - [Installation process](/window-installation-process/) Areas We Cover - [Loughton](/areas/loughton/) - [Epping](/areas/epping/) - [Theydon Bois](/areas/theydon-bois/) - [Chigwell](/areas/chigwell/) - [Woodford](/areas/woodford/) - [Chelmsford](/areas/chelmsford/) - [Brentwood](/areas/brentwood/) - [Billericay](/areas/billericay/) - [Hertford](/areas/hertford/) Hours - Mon–Fri · 7am–6pm - Sat–Sun · 9am–5pm - Quotes: 7am–8pm daily We accept Visa Mastercard Amex PayPal Apple Pay Bank transfer also accepted · No card surcharges © 2026 Bi Folds & Windows Direct of Essex Ltd · Company No. 12684765 [Privacy](/privacy-policy/)[Terms](/terms-conditions/)[Cookies](/cookie-policy/)