LF Flat Roofing · Sussex
Warm Roof Insulation Sussex
Done Once. Done Right. All Work Guaranteed.
- Icopal-approved specialists
- Free no-obligation survey
- 10-year written guarantee on every installation
Upgrading to a warm roof during a re-roof costs a fraction of doing it as a separate job.
Ask us for a roof survey.
No call-out fee. No obligation. We’ll visit, assess and quote.
- Icopal-Approved
- 15+ Years Experience
- Free Site Survey
- 10-Yr Written Guarantee
- Fully Insured
- All Sussex Covered
Recognise Any Of These? Warm Roof Insulation Can Fix Them.
Most flat roofs in Sussex were built as cold roofs. The insulation sits below the deck with a ventilation gap above it. In theory this prevents condensation. In practice the gap rarely works as intended, moisture gets trapped and you end up with damp ceilings, mould and rising energy bills.
Cold rooms below the roof
If rooms under your flat roof never warm up properly regardless of how much you heat them. A warm roof upgrade helps by placing insulation above the deck, keeping heat inside the property where it belongs.
Rising energy bills
If heat is escaping through a poorly insulated flat roof on an extension or garage. A warm roof upgrade helps by significantly reducing heat loss through the roof with high-performance PIR insulation.
Draughts and cold spots
If the temperature in the room is uneven, with cold spots that get worse in winter and after rain. A warm roof upgrade helps by creating a continuous insulation layer above the deck with no gaps or thermal bridges.
Condensation on ceilings
If moisture is forming on the underside of the ceiling, leading to staining and mould. A warm roof upgrade helps by eliminating the ventilation gap where moisture gets trapped in traditional cold roof construction.
Mould and damp patches
If there is visible mould growth on ceilings or walls adjacent to the flat roof. A warm roof upgrade helps by removing the conditions that allow condensation to form in the first place, addressing the cause rather than the symptom.
Outdated roof construction
If your roof was built before 2000 with no insulation above the deck. A warm roof upgrade helps by bringing the build-up up to current standards in a single visit, combined with a new weatherproof covering.
Warm Roof Construction: The Right Way To Insulate A Flat Roof
A warm roof places rigid PIR insulation above the structural deck and immediately below the weatherproof membrane. There is no ventilation gap, no moisture trap and no risk of the condensation problems that affect traditional cold roof construction. Heat is conserved within the property, and the roof structure stays warm and dry.
We install warm roof upgrades as part of a re-roofing project, combining new insulation with a new GRP, EPDM or torch-on felt weatherproof layer in a single visit. Tapered insulation boards can also be used to correct drainage falls and eliminate ponding where the roof is flat.
As Icopal-approved contractors, every warm roof installation is completed to building regulations standards with a strict quality process throughout. The result is a thermally efficient, condensation-free roof backed by our 10-year workmanship guarantee.
50-150mm Insulation depth
The thickness specified for your roof is determined on survey to meet current building regulations and maximise thermal performance.
10yr Written guarantee
Every warm roof installation comes with a written workmanship guarantee, backed by LF Flat Roofing directly.
Icopal-approved installation. Water-tested on completion.
Our Recent Warm Roof Installations
Why Sussex Homeowners Choose LF Flat Roofing
From the first call to the finished job, here is what you can expect.
Icopal-Approved Contractor
We are trained, tested and certified to install and guarantee Icopal roofing systems to the highest standard.
10-Year Written Guarantee
Every installation comes with a written workmanship guarantee. If something goes wrong due to our work, we come back and fix it.
Honest Advice, Not Upselling
We tell you what your roof actually needs. If a repair will do the job, we will say so rather than push you toward a full replacement.
Free Survey, No Obligation
We visit, assess and give you a fixed written quote. There is no call-out fee and no pressure to proceed.
Tidy, Professional Workmanship
We work cleanly, protect your property throughout and remove all waste on completion. You will not know we were there except for the roof.
Photo records at handover
We document every stage of the installation so you have a permanent record of what was installed, how and when.
What Happens When You Call LF Flat Roofing?
From the first call to the finished roof; simple, transparent, no surprises.
Free survey
One of our team will visit your property and assess if a repair or a replacement is the best solution.
Written quote
Installation
Handover
What Sussex homeowners say about LF Flat Roofing
Frequently asked questions
Find answers to common questions about our flat roofing services.
What is the difference between a warm roof and a cold roof?
In a cold roof, insulation sits below the deck with a ventilation gap above. In a warm roof, insulation sits above the deck directly below the weatherproof membrane. There is no ventilation gap, which eliminates the condensation risk that affects most older flat roofs.
Will a warm roof actually make my room warmer?
Yes. Rooms below poorly insulated flat roofs can be significantly colder than the rest of the property. A warm roof upgrade addresses this directly by keeping heat inside rather than letting it escape through the roof.
Can I add warm roof insulation to my existing flat roof?
In most cases yes. We add PIR insulation above the existing deck as part of a re-roofing project. The feasibility depends on upstand heights and the condition of the existing deck, which we check on survey.
Does a warm roof need building regulations approval?
Where the thermal performance of the roof is being significantly improved, building regulations may apply. We advise on this during the survey and provide the relevant documentation at handover.
What is tapered insulation?
Tapered PIR boards are cut at a slight angle so that when laid they create a fall across a flat roof, directing water toward the outlets. This eliminates ponding, which is one of the most common causes of flat roof failure.
How much does a warm roof upgrade cost?
The cost depends on the roof size, insulation thickness required and the weatherproof covering chosen. We provide a fixed written quote after the free survey with no hidden extras and no surprises.
Free survey.
Written quote.
No pressure, ever.
We’ll visit your property, assess the roof and give you an honest recommendation with a fixed written price. If a repair will do the job, we’ll tell you.
- Icopal-approved contractor, trained and certified
- 10-year written workmanship guarantee
- Photo records provided at handover
- £0 call-out fee for survey and quote
- Serving all of Sussex
No call-out fee. No obligation. We’ll visit, assess and quote.