
Flat Roofing in Portisheadfrom 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 Portishead from Crick
Flat roofing across Portishead and North Somerset
Portishead has changed a great deal in recent decades. The marina and Port Marine developments added modern apartments and town houses with balconies and roof terraces, alongside the older town's Victorian and post-war homes.
LMB covers Portishead with GRP and liquid flat roofing, including enquiries about balcony and terrace waterproofing.
If you're planning building work in Portishead, 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 Portishead 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 Portishead, and free.
For active leaks in Portishead, 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 Portishead
- Marina apartments with balconies
- Modern town houses with roof terraces
- Victorian and Edwardian homes
- Post-war semis and bungalows
Flat roofing options in Portishead
- Balcony and terrace waterproofing
- Extension roofs
- Garage replacements
- Leak tracing
Services in Portishead
Every flat roofing service, available in Portishead

GRP Fibreglass Flat Roofing
GRP fibreglass roofing for suitable extensions, garages and dormers.
GRP Fibreglass Flat Roofing in Portishead
Liquid Roofing Systems
A liquid membrane that cures into one continuous waterproof skin around every detail.
Liquid Roofing Systems in Portishead
Liquid Roofing Repairs
Targeted sealing for leaking or worn flat roofs, without paying for a full replacement.
Liquid Roofing Repairs in Portishead
Flat Roof Replacement
Failed roofs stripped back and replaced with a modern GRP or liquid system.
Flat Roof Replacement in Portishead
Emergency Leak Call-Outs
Emergency call-outs for active flat roof leaks; call to check availability.
Emergency Leak Call-Outs in Portishead
Free Roof Surveys & Quotes
A no-cost inspection and a clear, written price tailored to your roof.
Free Roof Surveys & Quotes in Portishead
Flat Roof Leak Repairs
Tracing and fixing leaks at the source, with honest repair-or-replace advice.
Flat Roof Leak Repairs in Portishead
Garage Roof Replacement
Leaking garage roofs replaced with seamless GRP or liquid systems.
Garage Roof Replacement in Portishead
Extension & Dormer Flat Roofs
Neat, seamless roofs for new and existing extensions and dormers.
Extension & Dormer Flat Roofs in Portishead
Balcony & Terrace Waterproofing
Seamless liquid waterproofing for balconies, terraces and walkable roofs.
Balcony & Terrace Waterproofing in Portishead
Commercial Flat Roofing
GRP and liquid roofing for offices, units and commercial buildings.
Commercial Flat Roofing in PortisheadWhy LMB in Portishead
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 Portishead.
Emergency Call-Outs
For active leaks in Portishead.
Local issues
Flat roof issues to consider in Portishead
Coastal wind and rain
Facing the Severn Estuary, Portishead homes take strong weather off the water.
Balcony thresholds
Modern balconies often leak at door thresholds and fixings rather than open surfaces.
Salt-laden air
Coastal air can accelerate wear on exposed roof details.
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 Portishead. 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 Portishead? 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 Portishead: FAQs
Do you serve Portishead?
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Yes. Portishead 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 Portishead?
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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 Portishead?
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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 Portishead are free, so you'll know the exact cost before committing.
Do you offer emergency call-outs in Portishead?
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Yes, for active flat roof leaks on homes and commercial properties in Portishead.
What guarantee do I get in Portishead?
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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 Portishead?
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Yes. Every job is covered by £5 million public liability insurance.
Do you cover Portishead?
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Yes, including the marina and older parts of town.
Can you fix a leaking balcony in Portishead?
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Yes, using a seamless liquid membrane detailed around thresholds.
Do you work on apartment blocks?
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Yes, including balconies and flat roof sections.
Is coastal weather a problem for GRP?
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GRP and liquid systems form seamless surfaces well suited to exposed locations.
Nearby areas we cover

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