Flat Roofing Across Bucks, Berks & Herts
New and replacement flat roofs using Lava 20 systems and felt. Request a free, no-obligation quote and discuss the appropriate system for your roof.
Checkatrade member · 16 years' experience · Free, no-obligation quotes
Before & after
See the difference on a real flat roofing job
Our work
Supplied flat roofing project photos
Service overview
What flat roofing involves, and why it matters
What it is
Flat roofing covers the installation and replacement of low-pitch roofs on extensions, garages, dormers, porches and bay windows. We install Lava 20 systems and felt flat roofs, and repair existing asphalt and felt roofs where a repair is the right answer.
Who it's for
Homeowners with a leaking or blistered flat roof, those building an extension or garage conversion, and anyone whose flat roof is ponding water or has been patched too many times.
When you need it
Replace or repair when you see ponding water that does not drain, blisters, cracks, splits at the edges, moss growth, damp on the ceiling below, or a spongy feel underfoot that suggests the deck is failing.
Why use a professional roofer
Flat roofs fail at the details: edges, upstands, outlets and where they meet walls. A neat top layer over a rotten deck will not last. We check what is underneath, fix the deck where needed, and finish every edge properly.
The cost of waiting
What happens if you leave it
Flat roofs hold water longer than pitched roofs, so small defects get worse faster.
Ponding and splits
Standing water finds every weakness. Over time it opens up cracks, especially where the roof meets walls and edges.
Rotten decking
Once water reaches the timber deck, it softens and rots. The roof then needs stripping back fully rather than simply recovering.
Damage to the room below
Flat roofs usually sit over kitchens, extensions and garages, so a leak damages ceilings, lights and contents.
Repeated patch repairs
Patching a roof that has reached the end of its life costs more over a few years than replacing it properly.
Common mistakes homeowners make
- Recovering over a soft or rotten deck
- Ignoring ponding water
- Choosing a system without asking about its guarantee
- Poorly finished edges and upstands
Our process
Five clear steps from first call to finished job
- 1
Contact
Call or send an enquiry during working hours to discuss your roofing needs.
- 2
Scope
Discuss the roof condition, access and proposed work with Billy.
- 3
Free quote
All work is quote-only, with free, no-obligation quotes.
- 4
Agree details
Confirm materials, timing, payment arrangements and how any additional work would be agreed before accepting.
- 5
Guarantee terms
New pitched roofs carry a 20-year guarantee. Flat roof guarantee length varies by system. Ask what terms apply to this job.
Benefits and considerations
Results depend on the roof condition, specification and work agreed. Customer feedback describes individual jobs, not a guarantee of the same outcome. Ask for the scope and applicable guarantee terms in your quote.
Built from a sound base
Fixing the deck first means your new covering is not sitting on rot.
Choice of system
Lava 20 and felt options let you balance budget and performance.
Clean finish
Neat edges and trims improve how your extension or garage looks.
Customer feedback
A supplied flat-roof review praised quick quoting and dates for work. Timing for another job depends on availability and scope.
Fair pricing
One customer told us our price was realistic compared with the over-priced quotes they had been getting.
Peace of mind
Checkatrade member with £1m public liability insurance.
In detail
Materials and methods to discuss
These are general roofing considerations, not a confirmed specification for every job. Materials, matching, access and installation details need to be agreed with Billy for your roof.
The right flat roof depends on the size, use and exposure of the roof, and what is underneath.
Lava 20 systems
Lava 20 is one of the flat roof systems we install. We will explain how it compares with felt for your roof and what guarantee comes with it.
Felt flat roofs
Modern felt systems are a proven, cost-effective option for garages, extensions and dormers when laid correctly on a sound deck.
Repairs to asphalt and existing roofs
Not every flat roof needs replacing. A supplied TW17 review describes repair of an asphalt loft-extension flat roof. Suitability for repair depends on its condition.
Decking, edges and drainage
We replace rotten boards, fit new trims and make sure water drains to outlets or gutters rather than ponding.
Extensions, garages and dormers
Each location has different details where the flat roof meets brickwork, tiles or windows. We finish these junctions so they stay watertight.
Getting flat roofing right
A flat roof is never perfectly flat. It needs a slight fall so water drains to a gutter or outlet. Many older flat roofs were laid with too little fall, or the deck has sagged over time, so water ponds in the middle. Correcting the fall during replacement is one of the biggest improvements you can make to how long a flat roof lasts.
The details matter as much as the main surface. Upstands where the roof meets a wall need to be dressed up and sealed under flashing. Edge trims must shed water into the gutter, not behind it. Outlets need to be sized and positioned so water actually reaches them. These are details to discuss when agreeing the specification for a flat roof.
Why homeowners choose BMB Roofing
BMB Roofing is owned and managed by Billy, who has 16 years of roofing trade experience. The business has traded for over two years and works with a dedicated on-site team.
All work is quote-only, with free, no-obligation quotes. Payment is by bank transfer or cash only; deposit and staged-payment requirements have not been provided.
The supplied reviews include individual accounts of communication, paying the quoted price and tidy sites. These are customer experiences, not universal promises about timing, price changes or results.
BMB Roofing is a Checkatrade member and carries £1 million public liability insurance. New pitched roofs come with a 20-year guarantee; flat roof guarantee length varies depending on the system installed. Working hours are Monday to Friday, 8am to 7pm.
What to expect on the day
Before accepting your quote, discuss the work included, materials, access, expected timing and payment arrangements with Billy.
Ask how any additional work and costs would be agreed if the roof reveals further issues. Timing can depend on the scope, access and weather.
Payment is by bank transfer or cash only. Ask for the guarantee terms applicable to your job; only new pitched roofs have a confirmed 20-year guarantee, and flat roof guarantee length varies by system.
What customers say
10/10 · Supplied review excerpt
"I had 5 quotes and found Bill to be the most thorough when assessing the work. He took the time to show me photos of the work needed to fix the roof. The quote was very competitive and he gave me a lot of confidence he was the right person to complete the work. The work was completed to a high standard. Even when some additional repairs were needed he explained the work and communicated exactly what was needed.…"
10/10 · Supplied review excerpt
"I was impressed by the two man team who looked at the roof edge and chimney problem and assessed what action was needed. They did not try and sell me a new roof or new chimney but were very honest and efficient. A price was quoted and a date set. They turned up on time and cleaned up after them and I paid the quoted price. They were also helpful and engaging. I would heartily recommend them. They did a good job.…"
10/10 · Supplied review excerpt
"I had a leak from my roof due to a problem with my ridge tiles and called BMB Roofing. I was really impressed with their work ethic and professionalism from start to finish. They didn't cut any corners and made sure the job was done correctly and to a high standard, They were very customer-orientated, happy to explain everything and answered any questions I had.…"
Where we work
Flat Roofing across Bucks, Berks and Herts
BMB Roofing is based in TW19 5NG and provides residential roofing services across Buckinghamshire, Berkshire and Hertfordshire, including the named towns listed here.
Flat Roofing: your questions answered
How much does a new flat roof cost?
+
It depends on size, access, the system chosen and the condition of the deck. We provide a free, no-obligation quote after inspection.
How long does it take to replace a flat roof?
+
The timeframe depends on size, deck condition, access and weather. Ask Billy about the expected duration.
What guarantee comes with a flat roof?
+
Flat roof guarantee length varies depending on the system installed. We will confirm the guarantee for your chosen system in your quote.
Lava 20 or felt, which is better?
+
Both can be the right choice. We recommend based on your roof's size, use and budget and explain the difference clearly.
Can my flat roof be repaired instead of replaced?
+
Often, yes. If the deck is sound and the damage is localised, a repair may be all you need.
Do you fit flat roofs in Reading and Maidenhead?
+
Yes. We also cover Henley-on-Thames, Basingstoke, High Wycombe, Amersham, Chesham, Rickmansworth and Hemel Hempstead.
How long does a flat roof last?
+
Lifespan depends on the system, installation quality and maintenance. A properly installed roof on a sound deck will last far longer than a recovered one.
Do you offer emergency call-outs?
+
No. We work Monday to Friday, 8am to 7pm, and do not offer emergency call-outs outside those hours. Call or send the form and we will respond within working hours.
How do I pay?
+
We accept bank transfer or cash.
Are you insured and accredited?
+
Yes. BMB Roofing is a Checkatrade member and carries £1 million public liability insurance.
What happens if extra work is needed once you start?
+
A roof may reveal further issues once opened up. Before accepting your quote, ask how additional work and any changes in cost would be agreed. The supplied business information does not specify this policy.
Will I be dealing with the owner?
+
BMB Roofing is owned and managed by Billy, who has 16 years of roofing trade experience, and works with an on-site team. Contact the business to discuss who will assess and carry out your work.
Is the quote really free?
+
Yes. Every quote is free and comes with no obligation. We work strictly on a quote basis, so you know the price before any work starts.
Related services
Roof Repairs & Maintenance
Roof leak investigation, repairs and general maintenance. Free, no-obligation quotes.
Fascias, Soffits & Guttering
Replacement and repair to protect your roofline and walls.
Leadwork & Flashing
Lead flashing, valley and soaker repairs and renewal.
New Roofs & Roof Replacements
Slate and tiled pitched roofs, with a 20-year guarantee on new pitched roofs.
Get your flat roofing sorted, at a price agreed up front
Free, no-obligation quote. Honest advice. Checkatrade member with £1m public liability insurance. Mon–Fri, 8am–7pm.
07379 843940Prefer to write? Contact us.