FENSA Registered·Checkatrade 10/10 (279 reviews)·£5m Public Liability sales@swiftltd.co.uk·01322 221010 Swift Home ImprovementsAboutServicesAll services→ WindowsBi-fold DoorsComposite DoorsAluminiumWarm RoofsSkylightsuPVC DoorsConservatoriesRoof LanternsOrangeriesTimber WindowsSecondary GlazingFire Doors AreasAll areas→ LondonKentSurreyEssexGreenhitheDartfordBromleyBeckenhamChislehurstSevenoaks Our WorkReviewsContact01322 221010Request Free Quote - Home - Services - Warm Roofs Warm Roofs # Warm roof replacementsfor tired conservatories acrossKent, London and Surrey Turn an unusable, freezing-in-winter and roasting-in-summer conservatory into a room you can use every day of the year, for a fixed price, installed by the same family-run team since 1998. Request free quote 01322 221010 FENSA registered · £5m Public Liability · 10-year workmanship guarantee Since 1998 Family-run installer FENSA Registered installer 10/10 Checkatrade · 279 reviews 10 years Workmanship guarantee £10m Employers' Liability Overview ## What we do, warm roofs 01 A warm roof replaces the polycarbonate or single-glazed roof on your existing conservatory with a fully-insulated tiled or slate-effect roof, complete with internal plastered ceiling. The result is a room you can heat like the rest of the house, warm in winter, cool in summer, quiet in rain. 02 This service is for anyone with a 1990s or early-2000s conservatory that is now used for storage rather than living. It is also for owners of newer conservatories with glass roofs that overheat in summer and lose heat in winter. Both problems disappear with a properly specified warm roof. 03 Professional installation matters here because a warm roof is a building-regulations job, not a cosmetic upgrade. The existing frames must be assessed for load capacity, the pitch and structure re-engineered to take tile weight, thermal performance calculated to meet Part L targets, and building control notified. We handle all of that within the fixed quote. Our work ## A snapshot of recent Swift installations Real photos from projects across Kent, London, Surrey and the South East. Tap through to see the full gallery. New white uPVC bay and casement windows with Georgian glazing bars fitted to a red-brick Kent home Close-up of a white uPVC sliding sash window with Georgian glazing bars and brass fitch fasteners in a red-brick wall Two-storey white uPVC bay windows with leaded glazing fitted to a mock-Tudor semi-detached home Close-up of a white uPVC bay window with slim top-opening vents in a painted render period bay White uPVC bay window and matching dormer window with Georgian glazing bars on a yellow-brick detached house Anthracite grey uPVC casement windows installed on a mock-Tudor brick and render family home Anthracite grey composite front door with side glazed panel under a newly clad gable porch roofline on a brick home White uPVC conservatory exterior with new tiled roof and lead flashing joining a red-brick house Bright conservatory interior with white uPVC casement windows, top-opening vents and a rooflight overlooking the garden White uPVC French patio doors and casement windows on a white rendered rear extension with a sandstone patio dining area, a Swift Home Improvements project White uPVC conservatory windows and French doors alongside new casement windows on a red-brick detached home with a tiled conservatory roof and lead flashing Modern white rendered home in Kent with black aluminium bi-fold doors and full-height Crittall-style windows at dusk See all recent work Why it matters ## What happens if you leave it An unused conservatory is dead space you paid for. It heats your garden, not your family. Every winter it sits at outside temperature; every summer it is uninhabitable by early afternoon. Left unaddressed the polycarbonate itself degrades, panels yellow, seals fail, and the roof begins to leak. At that point the choice is a like-for-like replacement (which reproduces every original problem) or a proper warm roof upgrade that finally makes the space work. The most common mistake we correct is a cheap insulated-over-polycarbonate 'warm roof' fitted without building regulations sign-off, without upgrading the structure, and without a proper internal plaster finish. Those installs fail thermal performance targets and can cause condensation issues within the roof build-up. Our process ## From first call to sign-off - STEP 1 ### Sales representative visit One of our sales representatives comes out first to walk the property, understand what you want, talk through options, materials and finishes, and outline indicative pricing. No pressure, no time-limited discounts. - STEP 2 ### Surveyor & fixed written quote If you want to proceed, our surveyor attends separately to measure every opening precisely, check structural context (lintels, thresholds, reveals) and lock in the specification. You then receive a fixed written quote to compare like-for-like. - STEP 3 ### Strip & prepare The existing roof is stripped and the frames prepared. Any structural reinforcement is added at this stage. - STEP 4 ### In-house fitting team install The insulated roof structure is built up on site: rafters, insulation layers, breather membrane, battens, tiles or slate effect finish, and a fully-plastered internal ceiling with spotlights and optional rooflights. - STEP 5 ### Sign-off & guarantee Building control inspects, we hand over paperwork, and you receive a 10-year guarantee. Benefits ## What you actually get ### Year-round usable room The insulated build-up brings the space to a similar thermal performance as any other room in the house. ### Lower energy costs Stops the heat leak that made the conservatory a burden on your heating system in winter. ### Quieter in rain Insulated build-up dramatically cuts rain-on-roof noise compared with polycarbonate or glass. ### No summer overheating The insulated roof stops solar gain through the roof, so the room stays workable even on hot afternoons. ### Adds property value A conservatory nobody uses is a liability at valuation; a fully-usable room converted from one is an asset. ### Building-regulations compliant Fully signed off, so there are no surprises when you come to sell. Specification ## Warm Roofs, how we specify Warm roofs are a specialist retrofit and the detail matters. Below are the decisions we walk through at survey. ### Structural assessment Not every existing conservatory can take a tiled roof without reinforcement. We survey the frame section, check the dwarf-wall capacity, and specify additional support where needed, steel goalpost frames, additional posts, or replacement of the ridge, before quoting. Any reinforcement is inside the fixed price. ### Insulation build-up Modern warm roofs use a rigid PIR insulation layer within the rafter zone plus an over-rafter layer to eliminate thermal bridging. U-values are calculated in writing to Part L targets. ### External finishes Lightweight tile-effect systems (interlocking tiles on battens over a breather membrane) are the most common finish. Natural slate is available for period properties where planning requires. Both come with manufacturer weather guarantees. ### Internal ceiling detail The internal finish is a fully-plastered ceiling, not exposed timber, not a suspended tile, with LED spotlights positioned to your layout. Velux rooflights can be added for natural light where desired. ### Building regulations Warm-roof retrofits are notifiable to building control. We handle the notification, the inspection appointments, and the paperwork at completion. Any installer who does not is leaving you exposed at resale. FAQ ## Common questions ### How much does a warm roof cost? +Every home is different, so we do not publish rates. Price depends on size, specification, glass, access and any structural work involved. Request a free survey and we will issue a fixed written quote before any work starts. ### How long does installation take? +A typical conservatory warm roof is completed on site in around one to two weeks depending on size and any structural work. ### Do I need planning permission? +Usually no, warm roof replacements are ordinarily permitted development. Conservation areas and listed buildings may need planning consent, which we flag at survey. ### Do I need building regulations approval? +Yes. Warm roofs are a notifiable change under Part L. We handle the notification and inspection as part of our fixed price. ### Will the existing frames take a tiled roof? +Most will with minor reinforcement; some need structural upgrades. We assess this at survey and specify any required work in the quote, no surprises later. ### Can I add spotlights and rooflights? +Yes. LED spotlights are standard in the plastered ceiling; Velux rooflights can be added at any position we agree at design stage. ### Is a warm roof warmer than triple glazing overhead? +Yes, significantly. Even the best glass roof loses more heat per square metre than an insulated warm roof, and glass gains solar heat in summer that an insulated roof does not. ### What guarantee do I get? +One 10-year Swift guarantee covering workmanship, roof tiles or slates and components, with any manufacturer cover included inside those 10 years. Backed by Swift Home Improvements Ltd (03679915), trading since 1998. ### Are you insured? +£5m Public Liability and £10m Employers' Liability. Certificates available before you accept a quote. ### Do you cover my area? +London, Kent, Surrey and the South East from Greenhithe. Call 01322 221010 to check your postcode. Related ## Explore related pages Conservatories Roof Lanterns Skylights Areas we cover Contact Home Next step ## Get a fixed price for your warm roofs in writing Director-level survey, no pressure, and a written fixed price you can compare like-for-like. We get back to you promptly. Request free quote 01322 221010 FENSA registered·10-year workmanship guarantee· London · Kent · Surrey · South East Family-run installers of bespoke windows, doors and conservatories. Serving London, Kent, Surrey & the South East since 1998. - Checkatrade 10/10 CompanyAbout - Our Work - Showroom - Trade Enquiries - Reviews - Contact Services - Windows - Composite Doors - Bi-fold Doors - Aluminium - Conservatories - Warm Roofs - Skylights & Lanterns - Orangeries - Timber Windows - Secondary Glazing - Fire Doors Get In Touch - 215 London Rd, Stone,Greenhithe DA9 9DQ - 01322 221010 - sales@swiftltd.co.ukMon–Fri · 9am–5pm Sat · By appointment © 2026 Swift Home Improvements Ltd · Company No. 03679915 · FENSA Registered Privacy Policy·Terms & Conditions·£5m Public Liability·£10m Employers' Liability CallRequest Free Quote