Horsham at a glance
- Postcode districts
- RH12
- Population
- about 51,472 (GeoNames)
- Council area
- Horsham District Council
- Building approval
- Horsham District Council building control, or a registered building control approver
- Nearest main town
- Crawley, about 7 miles
- Guide price region
- South East (+10% on West Midlands rates)
What flat roof work do we do in Horsham?
Single-ply membrane roofing
If a flat roof in Horsham has poor falls and ponding, a single-ply re-roof with tapered insulation can correct both problems at once. The tapered boards build the fall into the insulation, and the membrane is laid over the top, with outlets set at the new low points.
GRP fibreglass roofing
If a flat roof in Horsham has already been patched with fibreglass that keeps cracking, a full GRP replacement on a new, properly fixed deck often solves the problem. Cracks usually come from movement in the boards beneath, so renewing the deck and reinforcing the joints deals with the cause.
Warm roof insulation upgrades
In a place like Horsham, homeowners usually think about insulation when the roof covering is worn out. That is the right moment, because the thermal rules normally apply to a replacement over a heated room, and adding insulation then costs far less than doing it separately later.
All flat roof services in Horsham:
- EPDM rubber roofing
- Commercial flat roofing
- Balconies and roof terraces
- Garage roofs
- Flat roof replacement
- Dormer roofs
- Flat roof surveys and leak tracing
- Liquid-applied roofing
- Flats, HMOs and block roofs
- Flat roof repairs
- Torch-on felt roofing
- Warm roof insulation upgrades
- Emergency leak repairs
- Extension and kitchen roofs
- GRP fibreglass roofing
- Single-ply membrane roofing
- Green and sedum roofs
How much does a flat roof cost in Horsham?
Guide prices at South East rates including VAT. New and replacement roofs get a fixed price after a free survey; repair prices are confirmed once we've found the problem.
| Job | Guide price inc VAT |
|---|---|
| Upstand or flashing repair | £280–£720 |
| Dormer (8 m²), GRP, scaffold | £1,550–£2,900 |
| Extension (20 m²), felt, new deck + insulation | £3,000–£5,150 |
| Single garage (18 m²), torch-on felt | £1,650–£2,900 |
| Extension (20 m²), EPDM, new deck + insulation | £3,100–£5,350 |
What flat roofs are typical in and around Horsham?
In a large town like Horsham flat roofs are mostly on lock-up garage blocks on estates and bungalows with flat-roofed side extensions and dormers. Weather matters on a flat roof. Much of the South East sits in the drier Thames catchment at roughly 730 mm of rain a year, so the usual failures are at joints, upstands and outlets rather than from sheer volume of rain. Approximate 1991–2020 regional averages based on Met Office data.
Who approves flat roof work in Horsham?
Where approval is needed it goes to Horsham District Council building control, or a registered building control approver. Replacing more than half of a roof over a heated room usually counts as renovating a thermal element, so it is insulated to current standards and notified to building control. How the rules work.
Which places near Horsham do we cover?
- Crawley · 7 mi
- Horley · 11 mi
- Haywards Heath · 11 mi
- Burgess Hill · 11 mi
- Dorking · 12 mi
- Reigate · 13 mi
Flat roofing in Horsham: questions
Do you cover Horsham?
Yes, including postcode districts RH12. Send your postcode with your enquiry and we'll arrange a survey.
How much is a new flat roof in Horsham?
A typical 18 m² EPDM garage roof is £1,750–£3,100 and a 20 m² insulated EPDM extension roof is £3,100–£5,350, at South East guide rates including VAT.
Is a free survey available in Horsham?
Yes, for new and replacement roofs. A standalone condition survey or leak investigation report is a paid service.
What's the best flat roof system for a house in Horsham?
For most garages and extensions it's EPDM or GRP; torch-on felt is the budget option and liquid suits detailed or overlay jobs. We recommend one at the survey.