Windows
Absolute Window Co manufactures uPVC and aluminium replacement windows at our Worsley facility on the Eurocell Logik profile system — including casement, sash, tilt-and-turn, bay, and arched or other bespoke shapes. All windows are supplied and fitted across Greater Manchester with A-rated thermal performance as standard, CERTASS-certified installation, and a 10-year insurance-backed guarantee.
Beautiful, Energy-Efficient Windows
Whether you're replacing old draughty frames or enhancing a new build, our window range offers the perfect balance of style, performance and security. Our uPVC frames are fabricated from the Eurocell Logik profile system and our aluminium windows use the Sheerline system, both made up at our Manchester facility and installed by our own certified team.
- A-rated energy efficiency — reduce heat loss and bills
- Available in a wide range of foil finishes
- Triple glazing option available for maximum performance
- CERTASS certified installation — building regs compliant
Our Window Range
We offer a comprehensive range of window styles to suit any property — from traditional Victorian terraces to contemporary new builds.
Casement
Flush Sash
Bay & Bow
Tilt & Turn
Product Specifications
uPVC Windows
Aluminium Windows
Areas We Install Windows
We supply and fit A-rated uPVC and aluminium windows across Greater Manchester, from our manufacturing base in Worsley.
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Frequently Asked Questions
Answers to the questions we get asked most about replacement windows in Greater Manchester.
What does an A-rated window mean?
Window Energy Ratings (WER) run from A++ down to E, based on the British Fenestration Rating Council's assessment of thermal transmittance, solar gain and air leakage. An A-rated window offers excellent thermal performance, helping reduce heat loss and heating bills compared to older double glazing. Our standard uPVC and aluminium windows are A-rated, with triple-glazed upgrades available for even better figures.
What's the difference between uPVC and aluminium windows?
uPVC is the more affordable option, offers excellent thermal performance and comes in a wide range of colours and woodgrain foils — ideal for most domestic replacements. Aluminium is stronger, which allows slimmer sightlines and larger glazed areas, and it can be powder-coated in any RAL colour for a contemporary finish. Both are A-rated and carry a 10-year guarantee on the uPVC and aluminium frame, 5 years on the sealed glass units and 2 years on hardware.
How long do modern replacement windows last?
Good-quality uPVC and aluminium windows typically last 25–35 years before the frames, gaskets or sealed units need attention. Our guarantee covers the uPVC and aluminium frame for 10 years, the sealed glass units for 5 years and the hardware for 2 years, and components are repairable or replaceable should any fail within the window's lifetime.
Do I need planning permission to replace my windows?
For most houses, replacing windows falls under permitted development and does not require planning permission. Conservation areas, listed buildings, properties under Article 4 directions and most flats will need consent — and materials, glazing bars or opening styles may be restricted. We'll confirm the position for your specific property before any work begins.
What does CERTASS registration mean for me as a customer?
CERTASS is a government-authorised Competent Person Scheme, equivalent to FENSA. Because we are CERTASS registered, we self-certify that your replacement windows meet Building Regulations, so you don't need a separate Local Authority inspection. After installation you receive a compliance certificate and an insurance-backed guarantee direct from CERTASS.
How long does it take from survey to installation?
We can usually arrange a free no-obligation survey within the same week of enquiry. From signed order, installation is typically 3–7 weeks, depending on product and specification — the installation itself is usually 1–2 days for an average home, with our team clearing up and leaving you ready to enjoy the new windows the same day.
Will I save energy if I replace just half my windows now and the rest later?
Yes — but the savings come in proportion to how much of your total glazed area you upgrade. If your existing windows are old single-glazed or failing first-generation double glazing, replacing roughly half of them — typically the largest, most-used or worst-performing — captures most of the comfort and bill-reduction benefit, since those windows account for a disproportionate share of total heat loss. Prioritise north-facing elevations, bay windows, and any units that have lost their seal (visible misting between panes). The remaining originals can be upgraded later without rework on the new ones. We routinely run phased replacement schedules for customers spreading the spend across two or three years; ask at survey and we'll plan the sequence for maximum early gain.
Should I repair or replace my old windows?
Repair makes sense for windows where the frames are structurally sound and only the sealed unit, hardware or weather seals have failed; replacement is the right call once the frames themselves are decayed, the gaskets are perished, the hardware is no longer manufactured for the profile, or the windows are first-generation double glazing (typically pre-2002) where U-values sit around 3.0 W/m²K versus modern A-rated 1.2 W/m²K. A useful rule: if more than two of those conditions apply on more than a few units, full replacement is more cost-effective than piecemeal repair across a five-to-ten-year horizon. We carry out single sealed-unit swaps and individual window replacements as well as whole-house projects — call for a no-pressure assessment of which approach fits your situation.
How much do replacement windows cost in 2026?
Replacement window costs in 2026 vary significantly by frame material, style and size. For Greater Manchester homes, supplied-and-fitted prices typically run as follows: a single uPVC casement window costs £300–£900; a uPVC mock sliding sash window £450–£1,050; an aluminium casement window £800–£1,800; and a three-section uPVC bay window at ground-floor level £1,800–£3,500. A typical full-house replacement of 8–12 windows on a three-bed semi therefore lands in a £3,000–£10,000 range depending on the mix. Aluminium frames cost meaningfully more than uPVC because of the material itself and the slim-sightline manufacturing process. Triple-glazed units, woodgrain foils, leaded glass and bespoke RAL colours add to the base cost. Final pricing is confirmed by the salesperson during their visit and signed into the contract before any deposit is taken.
Do new windows add value to my home?
Yes — new windows typically add measurable resale value, with stronger uplift on older properties where original windows are visibly tired. Industry estate-agent surveys point to consistent gains following replacement of single-glazed or first-generation double-glazed units, particularly when the new windows noticeably improve kerb appeal across the elevation. The energy-efficiency angle adds value too: A-rated windows lower heating bills meaningfully on homes with old single-glazed or first-generation double-glazed units, and an EPC band uplift makes the property more attractive to mortgage assessors and buyers shopping by EPC. The aesthetic uplift — clean profiles, modern colour finishes, consistent sightlines — also matters in viewer first impressions. The strongest gains come from elevations where the original frames are tired, mismatched or visibly first-generation — older Victorian terraces and 1930s semis benefit most.
What's the difference between an A-rated, A+-rated and A++-rated window?
Window Energy Ratings (WER) are issued by the British Fenestration Rating Council (BFRC) and represent overall thermal performance — combining U-value, solar gain and air leakage. An A-rated window meets the minimum certified efficiency tier; A+-rated improves on it incrementally; A++-rated, the top current tier, typically uses warm-edge spacers, low-E coatings on multiple glass faces, argon or krypton fill and improved frame profiles to push heat retention further still. The difference in annual heating cost between A and A++ is small per window but adds up across a whole house. A++ also tends to mean lower condensation risk on cold mornings — useful where bathrooms, kitchens and high-humidity rooms have suffered with first-generation double glazing in the past. Our range covers A, A+ and A++ specifications across both uPVC and aluminium frames.
Is triple glazing worth the upcharge over double glazing?
For most Greater Manchester homes, double glazing remains the cost-optimal choice; triple glazing is worth the upcharge specifically for exposed Pennine-edge properties (Rochdale, Saddleworth, Mossley), large picture windows on north-facing elevations, and homes where noise reduction matters more than heat. The upcharge is meaningful — typically a fifth to a quarter more per window — and the heating-cost savings, while real, mean payback runs to around a decade rather than a few years on heating savings alone. In thermal terms, well-specified triple glazing can drop the U-value from around 1.2 W/m²K (A-rated double) to 0.8 W/m²K (A++-rated triple). Triple glazing also adds noise insulation roughly equivalent to half a class on the BS EN ISO 717-1 weighted index. Talk to us at the salesperson visit about whether triple glazing is right for your specific elevation and exposure.