Flat Roofing Services in Horsham
LF Flat Roofing provides professional installation, repairs, and maintenance for residential and commercial properties in Horsham.
Flat Roofing Repairs & Replacement Horsham
If your flat roof is showing signs of damage, the right solution will depend on the overall condition of the roof. In many cases, a targeted repair can resolve isolated problems and extend the life of the existing roof.
Leaking roofs demand immediate attention
Horsham’s housing stock is a real mix — Victorian and Edwardian terraces in the older parts of town, post-war semis across Roffey and Littlehaven, and a significant number of extended family homes throughout the district where flat roofed additions have been added over the decades. It’s those extensions, garage conversions, and dormer roofs where we’re most frequently called out, and where flat roofing problems tend to show up first.
The town’s position in the Low Weald also means properties can take a fair amount of rainfall across the autumn and winter months. Flat roofs that are borderline in summer often start to show their weaknesses by October. Our team works across Horsham and the surrounding villages including Southwater, Broadbridge Heath, Billingshurst, and Henfield helping property owners get ahead of problems before they become serious.
Common flat roofing problems we deal with include:
- Leaking flat roofs causing damp patches, water ingress, and internal staining
- Blistering, cracking, or lifting membranes that allow water to penetrate the roof surface
- Pooling water caused by poor drainage or ageing roofing materials
- Cold rooms and heat loss from older flat roof construction and worn insulation
- Loose ridge, hip, or verge areas that allow wind-driven rain to enter the property
- Recurring mortar failures on ridge or verge lines that repeatedly require repair
What's included in our flat roofing service
Comprehensive survey
Clear recommendation
High-quality materials
Professional installation
Warm roof upgrades
Full aftercare advice
How we work with you
Five straightforward steps from consultation to completion. We keep you informed at every stage and deliver the results you expect.
01 Consultation
A quick call to understand the issue or project and arrange a visit.
02 Site Survey
03 Transparent Quote
04 Professional Installation
05 Final Inspection and Aftercare
Types of flat roofing we can install
Torch on felt roofing
GRP fibreglass
Polycarbonate roofs
Warm roof construction
Insulation is fitted above the roof structure and below the weatherproof layer, helping reduce heat loss and lowering condensation risk.
What our customers say
Need a new roof or a repair?
Frequently asked questions
How long should a flat roof last?
A professionally installed flat roof in Horsham should last between 20 and 30 years, though this varies depending on the system used and how well it’s maintained. In our experience working across the Horsham district, older felt roofs on post-war extensions and garage conversions are often the first to deteriorate — particularly on north-facing or partially shaded sections where standing water lingers. Modern GRP and EPDM systems installed correctly will significantly outlast felt, and with annual checks, the lifespan can stretch considerably further.
Is torch-on felt or GRP better?
For most Horsham properties, GRP (fibreglass) is our first recommendation. It’s seamless, highly durable, and handles the wetter conditions of the Low Weald well over the long term. Torch-on felt remains a cost-effective option for the right job — typically larger, simpler roof areas — but on extensions, bay tops, and dormers where detailing is more complex, GRP tends to give a cleaner, longer-lasting result. We’ll always give you an honest comparison rather than defaulting to the more expensive option.
What is a warm roof and do I need one?
A warm roof places insulation above the structural deck rather than below it, eliminating the cold bridging and condensation problems that plague older flat roof constructions. This is particularly relevant in Horsham given the volume of 1960s to 1980s housing where flat roofed extensions were built with little or no effective insulation. If you’ve got a room that’s noticeably colder than the rest of the house, or you’re seeing condensation on ceilings beneath a flat roof, a warm roof rebuild may well be the most practical fix — not just for weatherproofing, but for year-round comfort and energy efficiency.
Can you repair a flat roof instead of replacing it?
Often yes, and we’ll always tell you honestly which way the job falls. A lot of the calls we take in the Horsham area turn out to be straightforward repairs — a lifted edge, a failed joint, or a small blister that’s let in water but hasn’t compromised the wider roof. Where that’s the case, a targeted repair is the right answer. Where the membrane has aged beyond the point of reliable patching, or where the underlying deck has taken water damage, we’ll explain the situation clearly and give you replacement options without any pressure.
Do you work on garages, dormers, and balconies?
Yes — these are some of the most common jobs we carry out across the Horsham area. Detached garages are particularly prevalent in the district, and a significant number have original felt roofs that are now well past their best. We also work regularly on flat roofed extensions, bay window tops, and dormer cheeks on the period properties around central Horsham and Roffey. No job is too small, and we cover the wider district including Crawley Down, Cowfold, and Partridge Green.
Can I submit a question before booking?
Yes, absolutely. If you’d like to talk through what you’re seeing before committing to a visit, get in touch and we’ll point you in the right direction. A lot of people aren’t sure whether what they’re looking at warrants a repair, a replacement, or just monitoring — and a quick conversation can save a lot of uncertainty. We’d rather answer your questions upfront than have you booking blind.