Roofing and building work in North London
Roof repairs, re-roofs, conservatory roofs, flat roofs, chimneys and general building. We find the actual problem, price it in writing and fix it properly.
- Quotes
- Free, written, itemised
- Insurance
- Fully insured
- Workmanship
- Guaranteed in writing
- Emergencies
- Call 07935 250505
Roofing and building services
One team for the whole job, from a single slipped tile to a new roof or an extension.
Roof Repairs
Leaks, slipped or broken tiles, storm damage and worn ridges — found and fixed properly.
DetailsNew Roofs & Re-Roofing
Full roof replacements in tile or slate, stripped back and rebuilt to current standards.
DetailsConservatory Roofs
Glass and polycarbonate roofs replaced with a solid, insulated tiled roof.
DetailsFlat Roofing
EPDM rubber, GRP fibreglass and torch-on felt for extensions, garages and dormers.
DetailsChimney Repairs
Repointing, flaunching, rebuilds and removals — plus the leaks chimneys cause.
DetailsFascias, Soffits & Guttering
Timber roofline repaired or replaced in uPVC, plus bargeboards, cladding and guttering.
DetailsLeadwork
Flashings, valleys, bays and dormers — the details that keep water out.
DetailsPorch Canopies & Bay Roofs
Porch canopies, bay window roofs and lean-tos rebuilt and re-tiled.
DetailsEmergency Roof Repairs
Storm damage and active leaks made safe and watertight — fast.
DetailsLoft Insulation & Boarding
Insulation topped up, loft boarded for storage, new hatches and ladders.
DetailsBuilding & Brickwork
Extensions, brickwork, repointing and brick cleaning.
Details
What happens when you get in touch
- 1
You call or send the form
Tell us roughly what’s wrong. A photo helps if you can take one safely from the ground.
- 2
We inspect the roof
We look at it properly, take photos and show you what we’ve found.
- 3
You get a written price
Itemised and fixed. Take your time deciding; we won’t chase you.
- 4
We do the work
On the agreed date, with the site cleared at the end of each day.
A local firm that turns up and does it right
Keystone is a local roofing and building company. The person who quotes your job is on the roof doing it, not passing it on to a subcontractor.
If a repair will do, we’ll quote for a repair. You’ll get photos of what we’ve found so you can see the problem for yourself.
Recent jobs, before and after
See more of our work
BeforeAfterGlass conservatory roof replaced with tiles 
BeforeAfterGarage roof rebuilt in EPDM rubber 
BeforeAfterPorch canopy rebuilt and re-tiled
What customers say
“The works satisfactory, we are pleased, they kept in contact before they came, informed me when they were coming and kept to the dates.”
“Great work 👏”
Areas we cover
We work across North London and the towns and villages listed here. If your town isn’t listed, call and ask.
Questions people ask us
Are your quotes really free?
Yes. We visit, inspect and give you a written, itemised quote with no obligation.
Which areas do you cover?
We cover North London and the surrounding area. If you are unsure, give us a call.
Are you insured?
Yes. We carry full public liability insurance and can show you the certificate on request.
Do you guarantee your work?
Yes. Our work comes with a written workmanship guarantee, and materials carry the manufacturer’s warranty.
Do you tidy up after the job?
Every day. Magnetic sweeps for nails, all waste removed, and gutters cleared of debris before we leave.
Tell us what’s wrong with the roof
We’ll come out, find the cause and give you a fixed written price.