Flat roofs & EPDM
Flat roofs & EPDM
rubber roofing
Durable, seam-free EPDM rubber flat roofing for extensions, garages and flat-roofed sections across Bath. Replaces failing felt with a covering that actually lasts.
Why we recommend EPDM over felt
Old felt flat roofs are one of the most common sources of leaks we see on extensions across Bath — the joints and seams degrade, and once one goes, water can travel a long way under the roof before it shows inside. EPDM rubber is a single membrane with no seams to fail, and it’s what we recommend whenever a felt flat roof needs replacing.
Single-membrane rubber
One continuous sheet with no joints across most domestic flat roofs — nothing for water to find a way through.
20+ year lifespan
EPDM significantly outlasts traditional felt, with far less maintenance needed over its life.
Suits extensions & garages
Ideal for the flat-roofed extensions common across Twerton, Oldfield Park and newer parts of Bath.
Low maintenance
No re-coating or re-felting every few years — an occasional check is normally all that’s needed.
Installing an EPDM flat roof
Assess & measure
We check the deck, falls and drainage, and take exact measurements so the membrane can be cut to size.
Strip old covering
Old felt is removed and the deck checked and repaired if needed before the new membrane goes down.
Fit EPDM membrane
The rubber sheet is fitted, bonded and dressed into trims, upstands and outlets.
Written guarantee
Every EPDM installation comes with a written guarantee — see our guarantee page.
What EPDM costs
Small flat roof (garage/porch)
£700–£1,400
Extension flat roof
£1,500–£3,500 depending on size
Full dormer or larger flat roof
£3,500–£6,000+
Flat Roof FAQs
My flat roof has standing water after rain — is that normal?
A little is common and not always a problem. Persistent pooling that doesn’t drain within 48 hours is worth getting checked, especially on older felt or ageing EPDM.
Can you fit EPDM over our existing felt roof?
Sometimes, if the deck underneath is sound — but we’ll usually recommend stripping back to the deck first so any hidden rot or damp gets caught early.
How long does an EPDM install take?
A typical garage or small extension roof takes 1–2 days, weather permitting. Larger flat roofs may take longer.
Is EPDM noisy in the rain?
Not noticeably more than felt or tile — any extra noise usually comes down to the insulation and deck underneath rather than the membrane itself.
Got a pitched roof instead? See our new roofs or roof repairs pages. Dealing with an active leak right now? Go straight to our leaking roof page.
Read more about the difference between repairing and replacing a roof on our roof repairs page, or see our full cost guide for realistic Bath pricing across all roof types.
Got a failing flat roof?
We’ll assess it, tell you honestly whether it needs replacing, and quote a proper EPDM fix.