
Flat Roofing in Keynshamfrom our Crick base.
GRP and liquid roofing for homes and businesses. Free surveys, tailored quotes and 10–20 year installation guarantees, depending on the system and matting.
£5m public liability insurance · Approved liquid roof installer
Serving Keynsham from Crick
Flat roofing across Keynsham and Bath and North East Somerset
If you are extending a home in Keynsham, the flat-roof specification should be discussed before the new room is finished. Rooflights, wall upstands and outlets affect both the layout and the waterproofing details. LMB can assess a proposed GRP or liquid roof from the information available and confirm the final scope through a free survey.
For an existing Keynsham extension, look beyond the age of the roof when deciding whether to replace it. Deck condition, previous alterations and the point where it joins the house all matter. A repair may be appropriate for a limited defect, while wider damage may justify replacement; the recommendation should explain that distinction clearly.
Garages and dormers need the same attention to edges and drainage as larger roofs, even when the surface area is small. Tell us whether access requires entry through your home and whether a room underneath is in daily use. Those practical details help us prepare a quote for the work rather than a generic allowance per square metre.
Keynsham is included in our coverage between the Bristol and Bath areas, with enquiries handled from the existing Crick base. We offer free surveys, written quotes and emergency call-outs for active flat-roof leaks. Availability is confirmed directly with Liam; this page does not promise an attendance time or claim a local branch.
If you're planning building work in Keynsham, such as a new extension, a loft conversion with a dormer, or converting a garage, it pays to think about the flat roof early. Getting the roof covering, edge trims and wall upstands right at the build stage is worth considering before the work starts. We can quote for the roof as soon as you have drawings or a deck in place, and we'll coordinate with your builder on timing.
If you own a property in Keynsham that already has a flat roof, a free survey gives you a clear picture of its condition before small problems become expensive ones. You'll get honest advice on whether a targeted liquid repair will do the job, whether the roof can be overlaid, or whether a full replacement with GRP or a liquid system is the better long-term spend. Whatever the answer, the quote is written, tailored to your roof in Keynsham, and free.
For active leaks in Keynsham, we offer emergency call-outs. Call 07517 190213 and discuss availability. For planned work, we'll book your free survey at a time that suits you.
Property types we can assess in Keynsham
- Post-war semis
- Modern estates
- Town-centre period properties
- Bungalows with extensions
Flat roofing options in Keynsham
- Garage roofs
- Extension roofs
- Dormer roofs
- Leak repairs
Services in Keynsham
Every flat roofing service, available in Keynsham

GRP Fibreglass Flat Roofing
GRP fibreglass roofing for suitable extensions, garages and dormers.
GRP Fibreglass Flat Roofing in Keynsham
Liquid Roofing Systems
A liquid membrane that cures into one continuous waterproof skin around every detail.
Liquid Roofing Systems in Keynsham
Liquid Roofing Repairs
Targeted sealing for leaking or worn flat roofs, without paying for a full replacement.
Liquid Roofing Repairs in Keynsham
Flat Roof Replacement
Failed roofs stripped back and replaced with a modern GRP or liquid system.
Flat Roof Replacement in Keynsham
Emergency Leak Call-Outs
Emergency call-outs for active flat roof leaks; call to check availability.
Emergency Leak Call-Outs in Keynsham
Free Roof Surveys & Quotes
A no-cost inspection and a clear, written price tailored to your roof.
Free Roof Surveys & Quotes in Keynsham
Flat Roof Leak Repairs
Tracing and fixing leaks at the source, with honest repair-or-replace advice.
Flat Roof Leak Repairs in Keynsham
Garage Roof Replacement
Leaking garage roofs replaced with seamless GRP or liquid systems.
Garage Roof Replacement in Keynsham
Extension & Dormer Flat Roofs
Neat, seamless roofs for new and existing extensions and dormers.
Extension & Dormer Flat Roofs in Keynsham
Balcony & Terrace Waterproofing
Seamless liquid waterproofing for balconies, terraces and walkable roofs.
Balcony & Terrace Waterproofing in Keynsham
Commercial Flat Roofing
GRP and liquid roofing for offices, units and commercial buildings.
Commercial Flat Roofing in KeynshamWhy LMB in Keynsham
What you can count on
£5m Public Liability
£5 million public liability insurance.
Approved Installer
Liquid roof systems applied to the manufacturer's method.
Installation Guarantee
10–20 years, depending on the system and matting.
Free Survey
No-cost inspection and quote in Keynsham.
Emergency Call-Outs
For active leaks in Keynsham.
Local issues
Flat roof issues to consider in Keynsham
Ageing estate roofs
Original felt garage and porch roofs are reaching end of life.
River valley damp
Close to the Avon and Chew, roofs can stay damp.
Extension junctions
Leaks often start where extensions meet the house.
Our process
Five clear steps, start to finish
- Step 1
Inspection
A free visit to inspect the covering, deck, edges, upstands, outlets and penetrations.
- Step 2
Diagnosis
A plain-English explanation of the problem and your options: repair, overlay or replace.
- Step 3
Written quote
A tailored price setting out the system, scope and guarantee. No fixed rates.
- Step 4
Installation
Preparation, deck repairs where needed, and the GRP or liquid system applied correctly.
- Step 5
Check and guarantee
Completed work checked and applicable terms confirmed. Installation guarantees are 10–20 years, depending on the system and matting; repair terms are agreed separately.
Why a specialist
Why choose a GRP and liquid only roofer
Many roofers offer every type of flat roof covering: felt, rubber, asphalt and fibreglass. LMB deliberately doesn't. We work only with GRP fibreglass and approved liquid roofing systems, because both create a single, seamless waterproof surface with properly specified junctions and details.
That focus shapes every recommendation we make for flat roofing in Keynsham. We aren't trying to sell you whichever product we happen to stock. We're choosing between two modern systems on the basis of what your roof actually needs: its size, shape, deck condition, drainage, details and how it will be used.
Liam Brinkworth owns and runs the business. Contact Liam to discuss the survey, proposed work and quotation.
LMB holds £5 million public liability insurance. Liquid systems are applied as an approved installer, and installations come with a guarantee of 10 to 20 years depending on the system specified and whether it requires matting.
What affects the price of flat roofing in Keynsham? The main factors are the roof area, how easy it is to reach, the condition of the existing deck, how many details there are (pipes, vents, rooflights, upstands and outlets), whether the old covering needs stripping, and which system is specified. That is why we never quote a fixed rate. The free survey looks at each of these on your roof, so the written quote reflects the real job and the proposed scope is clear. Any changes should be discussed before additional work is agreed.
Before you call
How to check your flat roof safely
You don't need to climb onto a roof to spot most warning signs. From an upstairs window, the garden or the ground, look for cracked or blistered surfaces, moss or vegetation growing on the roof, water that stays ponded for days after rain, lifted or broken edge trims, and gaps where the roof meets a wall.
Inside, check the ceilings under the flat roof for brown stains, bubbling paint or plaster, and any damp or musty smell. Stains that grow after heavy rain are a clear sign water is getting in, even if you never see a drip.
If you can, take a few photos and note when the problem appears: after every shower, only in heavy rain, or only in wind-driven rain. That detail helps narrow down the cause before the survey and makes your free quote more accurate.
Please don't climb onto or walk on a roof to inspect it. A soft deck can give way, and wet roofs are slippery. Leave that part to us. If water is actively coming in, call us for an emergency call-out rather than waiting.
Ready to get it looked at? Request your free survey or go back to the homepage.
Questions
Flat roofing in Keynsham: FAQs
Do you serve Keynsham?
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Yes. Keynsham is part of our service area, covered from our base in Crick, near Chepstow, alongside Bristol, Bath, Newport, Somerset and Gloucestershire.
How do I check availability in Keynsham?
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For active leaks we offer emergency call-outs, so call 07517 190213 and discuss availability. For non-urgent work, we'll arrange a free survey at a time that suits you.
How much does flat roofing cost in Keynsham?
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We're strictly quote-only, because every roof differs in size, access, deck condition and detailing. Surveys and written quotes in Keynsham are free, so you'll know the exact cost before committing.
Do you offer emergency call-outs in Keynsham?
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Yes, for active flat roof leaks on homes and commercial properties in Keynsham.
What guarantee do I get in Keynsham?
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Installations carry a 10–20 year guarantee, depending on the system used and whether it requires matting.
Are you insured to work in Keynsham?
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Yes. Every job is covered by £5 million public liability insurance.
When should I discuss the flat roof for a Keynsham extension?
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As early as practical, particularly when rooflights, wall junctions and outlets are being planned. Available drawings help start the conversation; the final roof specification depends on assessment.
Where is my Keynsham enquiry handled?
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By LMB Flat Roofing Specialists from our existing base in Crick, near Chepstow. We do not claim a separate branch address in this service area.
Nearby areas we cover

Book your free roof surveyin Keynsham.
Tailored quote. £5m public liability insurance. Installation guarantees of 10–20 years, depending on system and matting.
