Flat roofing specialists covering Bradford-on-Avon and the BA15 area. GRP fibreglass and EPDM rubber for extensions, garages and period property additions. Free no-obligation quotes.
Flat roofs fail at the surface and the details: a blistered or split membrane, standing water that never clears, or a leak at an upstand or outlet. Most Bath flat-roof problems are old felt reaching the end of its life.
Water ponding on the roof days after rain
Blisters, splits or cracks in the felt or covering
A leak into the room or extension below
Felt lifting at edges or around the outlet
A roof that's been patched repeatedly
When it is not the answer: If your flat roof is a sound GRP or EPDM system under 15 years old with one isolated fault, a targeted repair is far cheaper than a full replacement — we'll tell you honestly which you need. Read the full guide.
Warm deck versus cold deck flat roof construction compared
Flat Roofing in Bradford-on-Avon
Flat Roofing Bradford-on-Avon
Bradford-on-Avon has a high proportion of period properties with later additions — outbuildings, workshops, and rear extensions built on flat roofs over the past 50 to 100 years. These additions are often in felt that is now failing, and the high humidity of the Avon valley location means deterioration is faster here than in drier Wiltshire locations. Conservation area compliance is also relevant for any flat roofing work visible from public areas.
Flat Roofing on Period Properties in Bradford-on-Avon
GRP fibreglass is well suited to the flat roof additions on Bradford-on-Avon's period properties. It can be colour-matched to complement stone or brick surrounds, can be worked around complex abutment details typical of historic properties, and is accepted in most conservation area contexts where the roof surface is not visible from the public realm. EPDM is an alternative for larger or more geometrically complex roof areas.
Flat Roof Costs in Bradford-on-Avon
Garage or outbuilding (GRP): £900–£2,000 Extension flat roof (GRP): £1,500–£3,500 EPDM (larger areas): £2,500–£5,500 Free quotes for all flat roofing in BA15.
For flat roofing in Bradford-on-Avon, call 0122 528 7924 — free assessment, no call-out fee, honest quote before any work starts.
Our Process in Bradford-on-Avon
Flat Roofing in Bradford-on-Avon: How We Work
Free Assessment
Every flat roofing job in Bradford-on-Avon starts with a free assessment visit. We inspect the full roof condition — not just the reported problem — and give a written fixed price before any work starts. No call-out fee for the assessment. No obligation to proceed.
Local Knowledge
Bradford-on-Avon's housing stock has specific characteristics that affect how flat roofing work is specified and carried out. We have been working across BA15 for over 20 years and understand the local materials, construction methods, and planning requirements that apply to your property type.
What Good Completion Looks Like
At the end of every flat roofing job in Bradford-on-Avon we carry out a site check: confirm the work is complete, clear all debris, and ensure drainage is running correctly. You receive a written confirmation of the work done and a guarantee certificate. For any job over 500 pounds we provide a full written specification of materials and methods used.
The process
How a Bradford On Avon Flat Roofing Job Runs
1. Survey
We inspect the deck, falls and current covering, and identify why it's failing rather than just patching the symptom.
2. Recommend & quote
We recommend GRP or EPDM based on the roof and setting, and quote a fixed price including any deck and insulation work.
3. Scheduling
We book the job — most flat roofs are a one to three-day project — and confirm access.
4. Strip & re-lay
We strip to the deck, re-establish proper falls, upgrade insulation to current regs, and lay the new seamless covering.
5. Finish & sign-off
We complete the trims and outlets, clear the site, and hand over your guarantee and any manufacturer warranty.
Timescales
Job Durations at a Glance
Job
Typical duration
Flat roof repair
2–4 hours
Garage flat roof (GRP/EPDM)
1 day
Extension flat roof
1–2 days
Large or multi-level flat roof
2–4 days
Deck replacement
+1 day
GRP needs dry conditions to cure, so we watch the forecast and won't lay fibreglass into rain — EPDM is more weather-tolerant.
Access
Getting Safely onto Bradford On Avon Roofs
Most Bath flat roofs are reached from a tower or ladder; scaffold is added only for higher or awkward extensions and is itemised. Scaffold is specified for: first-floor and above flat roofs, or where edge protection is required - always itemised in your written quote, never a hidden extra, and we arrange it.
Bradford-on-Avon's steep weavers' terraces and stone cottages climbing the hillside make access and scaffold footing a real consideration. Pavement scaffold and skip permits go through Wiltshire Council; allow a few working days on streets like Silver Street, Market Street, Newtown, Middle Rank where space is tight.
Pricing
What Flat Roofing Costs in Bradford On Avon
Job
Typical range
Notes
Flat roof repair
£150–£450
Isolated fault
Garage flat roof (EPDM)
£800–£1,800
Single-ply rubber
Garage flat roof (GRP)
£1,000–£2,200
Seamless fibreglass
Extension flat roof
£1,800–£4,000
Size dependent
Large/multi-level flat roof
£3,000–£6,000+
Incl. insulation upgrade
What moves the price
Roof area and number of outlets, upstands and details
GRP fibreglass vs EPDM rubber vs the setting
Whether the deck and insulation need replacing to meet regs
Access height on first-floor and above extensions
Worked example: A GRP fibreglass replacement on a typical rear kitchen extension in Bear Flat, including a new deck and upgraded insulation: around £2,600.
No deposit on flat-roof repairs under £500. Staged payment on full replacements, balance on completion — never anything before materials are on site. VAT included.
Covering BA15 and surrounding postcodes.
Guarantee
Your Guarantee, Explained
Our flat-roof workmanship is guaranteed for 10 years; GRP and EPDM systems carry manufacturer warranties of 20–25 years on top when installed to spec.
Covered: workmanship for 10 years, in writing, transferable if you sell.
On top: manufacturer warranties on materials (terms vary by product).
Not covered: storm or impact damage - that is an insurance matter, and we will document it for your claim.
If a fault appears in covered work, we come back and put it right. No quibbling, no re-charge.
Good to know
What It Is Like While We Work
Flat roofing is quiet, quick work with minimal mess — usually done in a day or two with the old covering taken away and the area left clean. You do not need to stay home for external work - we just need power and access agreed in advance.
GRP laying waits for a dry window; EPDM can go on in most conditions. Either way we never leave a deck exposed overnight. The Avon valley here traps humidity and the tightly-packed stone terraces see accelerated moss on shaded slopes.
Customer Reviews
Recent Flat Roofing Jobs in Bradford-on-Avon
★★★★★
“Rear outbuilding flat roof on our stone cottage near the town bridge. GRP installed in one day around the complex stone parapet detail. Conservation area compliant, no planning issues, no leaks since.”
Cecilia W. · Bradford-on-Avon town centre
★★★★★
“Extension flat roof on our Trowbridge Road semi. Old felt was completely saturated in places. Full GRP replacement with correct drainage fall — sorted permanently.”
Philip D. · Trowbridge Road, Bradford-on-Avon
★★★★★
“EPDM on our larger workshop building adjacent to the river. Good price for the size of the job, done efficiently over two days, no issues with the abutment detailing.”
Thea C. · Bradford-on-Avon BA15
Maintenance Guide
Keeping Your Flat Roof in Good Condition
Outlet Inspection — The Most Important Task
The single most important maintenance task for any flat roof is keeping the outlet clear. A blocked flat roof outlet during heavy rainfall can fill the roof surface with standing water in minutes. The weight of standing water — approximately 1 tonne per cubic metre — stresses the deck, forces water into any existing membrane weakness, and can cause sudden deck failure in severe cases. Outlets should be checked and cleared in late autumn after leaf fall, again in spring after pollen and moss season, and after any period of heavy storm debris. The inspection takes two minutes and prevents the most common flat roof emergency.
What GRP Maintenance Looks Like
GRP fibreglass flat roofs require minimal maintenance compared with felt alternatives. The gelcoat surface should be inspected annually for any chips, cracks, or impact damage — these are typically small and easily repaired with GRP repair resin before they develop into through-membrane leaks. The edge detail and upstands should be checked for any lifting or gap formation at the wall junction. Standing water that does not drain within 48 hours of rainfall indicates either a blocked outlet or an inadequate drainage fall — both should be investigated rather than ignored.
How Long Your Flat Roof Should Last
A correctly installed GRP flat roof has a design life of 30 to 40 years. The 25-year manufacturer warranty covers membrane integrity — not storm damage, impact damage, or maintenance-related failures such as outlet blockage. In practice, GRP flat roofs installed in Bath over the past 20 years are performing well with no significant membrane failures where the installation was carried out correctly and outlets have been maintained. The most common cause of premature GRP failure is incorrect fall specification at installation — water pooling on a GRP surface does not cause immediate failure but accelerates surface degradation over time.
FAQ
Frequently Asked Questions
Yes in most cases. GRP is accepted for flat roof surfaces not visible from the public realm in the Bradford-on-Avon conservation area. We advise on conservation area requirements as part of every quote.
GRP garage or outbuilding roofs cost 900 to 2,000 pounds. Extension flat roofs cost 1,500 to 3,500 pounds. Free quotes for all sizes.
GRP fibreglass is our recommendation for the high-humidity BA15 valley location. It is seamless, resistant to moisture ingress, and carries a 25-year warranty.
Yes. We cover Bradford-on-Avon 24/7 for emergency flat roof repairs. Call 0122 528 7924 at any time.
In most cases, yes. GRP on outbuilding and extension flat roofs is accepted for conservation area properties in BA15 where the surface is not visible from the public realm. We advise on the planning position as part of every survey.
A standard garage or small extension flat roof in Bradford-on-Avon is typically completed in one day for GRP. Larger or more complex roofs with complicated abutment details take 2 to 3 days.
Yes. We cover Bradford-on-Avon 24/7 for emergency flat roof repairs. Call 0122 528 7924 at any time.
