Repair or replace? Straight advice first
The most important roofing decision is also the one some firms get wrong on purpose. A few slipped tiles on a sound roof is a repair — not a reason to sell you a whole new roof. But if your roof is 60+ years old, the felt underneath has perished, or you're getting the same leak back every winter, patching is throwing good money after bad and a reroof is the honest answer. We inspect, tell you which it is, and put it in writing.
What we do
| Service | What it covers |
|---|---|
| Roof repairs | Slipped/broken tiles, leaks, storm damage, ridge and flashing repairs |
| Reroofing | Full strip and reroof — new felt, battens and covering |
| Slate & tile | Natural slate, clay and concrete interlocking tiles |
| Flat roofing | EPDM rubber, felt and fibreglass (GRP) with proper falls |
| Leadwork | Flashings, valleys, chimney soakers and detailing |
| Chimney work | Repointing, rebuilds, flashing and capping |
| Gutters, fascias & soffits | Supply and installation, and clearing/repairs |
Signs your roof needs attention
- Water stains on upstairs ceilings or in the loft after rain
- Slipped, cracked or missing tiles visible from the ground
- Daylight through the roof when you're in the loft
- Sagging in the roofline, or granules from tiles collecting in gutters
- Damp or crumbling mortar around the chimney
Any of these is worth a look before it turns into a bigger — and more expensive — problem. Left alone, a small leak rots timbers and ruins insulation and plaster below.
What a reroof costs, and how long it takes
A typical reroof on a London semi or terrace ranges from around £6,000–£15,000 depending on size, pitch, access and the covering you choose — concrete interlocking tiles at the value end, natural slate at the premium end. A standard reroof takes 5–8 working days, weather permitting: scaffold up, strip the old covering, replace felt and battens, lay the new tiles or slate, finish the leadwork and ridge. Repairs are far quicker and cheaper. Every job gets a fixed-price quote after we've actually looked at the roof.
Why build with Delta
- Honest repair-vs-replace advice — we won't sell you a roof you don't need.
- Finished properly — correct felt, battens, ventilation and leadwork, not a quick patch.
- Guaranteed — workmanship guarantee plus manufacturer material warranties (15–30 years), £2M public liability insurance.
- Local & responsive — our yard is in Hounslow, so for urgent leaks and storm damage we can often attend quickly. Serving Hounslow and across West London.
Frequently asked questions
Should I repair or replace my roof?
A few slipped tiles on a sound roof is a repair. If it's 60+ years old, the felt has perished, or leaks keep returning, a reroof is usually more cost-effective. We advise honestly after a free assessment.
How much does a new roof cost?
Around £6,000–£15,000 for a typical London semi or terrace, depending on size, pitch, access and material. Repairs cost far less. Fixed-price quote after inspection.
How long does a reroof take?
Usually 5–8 working days for a standard semi or terrace, weather permitting.
Do you do flat roofs?
Yes — EPDM rubber, felt and fibreglass (GRP) for extensions, dormers and garages, with proper falls and detailing.
Is the work guaranteed?
Yes — workmanship guarantee plus manufacturer material warranties (15–30 years), and £2M public liability insurance.
Related
Get a free roof assessment
Tell us the address and what you're seeing — a leak, missing tiles, or a roof that's just looking tired. We'll take a proper look and give you honest, fixed-price options. No obligation.
Request a free assessment