Crawley · Sussex · Surrey · Kent
Bonwycks is a family-run roofing company based in Crawley. We repair, replace and look after roofs across the South East — with honest advice, tidy sites and a guarantee we actually stand behind.
What we do
Slipped tiles, leaks, storm damage and everything in between — fixed properly the first time.
Learn moreFull roof replacements in tile, clay or slate — stripped, re-felted and rebuilt to last 60 years.
Learn moreGRP fibreglass, EPDM rubber and high-performance felt — flat roofs that stay dry for 25+ years.
Learn moreFrom handmade clay to Welsh slate — heritage-grade pitched roofing with modern fixings.
Learn moreNew uPVC roofline, gutter repairs and clearing — the unglamorous work that saves your walls.
Learn moreRepointing, rebuilding, flaunching and flashing — chimneys made safe and watertight.
Learn moreStorm damage, sudden leaks and make-safes — rapid response when the weather wins.
Learn moreFlashings, valleys, bay tops and box gutters — traditional lead, dressed by hand.
Learn moreCareful de-mossing and soft biocide treatment — no pressure washers, no wrecked tiles.
Learn moreDrone and physical surveys with honest photo reports — for buyers, sellers and peace of mind.
Learn moreRecent work
Real jobs, real photographs — no stock imagery, no borrowed portfolios.
A full-width scaffolded re-roof photographed from the front with the Bonwycks van on site.
See the job
Fresh covering laid across a fully renewed batten and membrane build-up.
See the job
The same flat roof before the work and after the new waterproof finish went down.
See the jobHow it works
Tell us what's going on — a photo from the garden helps. A real roofer replies, not a call centre.
Ground, ladder or drone — we inspect the roof and photograph everything we find, good and bad.
Itemised, honest, valid for 60 days. Scaffolding and waste included. Compare us with anyone.
We turn up when we said, protect your garden, and hand over a photographed, guaranteed job.
Free roof tools
We built these so you can get honest numbers and a straight steer in two minutes — no email address, no follow-up calls.
A realistic price range for repairs, re-roofs and flat roofs, built on real southern-England rates.
Get a ballparkTurn a rise and run into degrees — and find out which tiles can legally go on your roof.
Work out your pitchEight quick questions, an instant verdict. Find out if your roof needs help before the weather decides.
Check your roofWhere we work
Before you commit
We would rather you were well informed than easily sold to. These are the guides we send people most often.
Straight numbers, no gatekeeping. Here's what a re-roof actually costs around Crawley in 2026, what pushes the price u…
Read the guide · 9 min readMost people call a roofer either far too early or years too late. Here's how to work out which one you are, using noth…
Read the guide · 7 min readThree materials cover almost every flat roof in Sussex. They are not interchangeable, and the cheapest one is rarely t…
Read the guide · 8 min readWord of mouth
"Found the leak two other firms missed, fixed it the same week, and charged less than either had quoted. Photos of everything."Sarah M. Roof repair · Pound Hill, Crawley
"Full re-roof in clay tile. Scaffold up Monday, down the next Friday, and the garden was cleaner than they found it."David & Anne P. Re-roof · Horsham
"Honest to a fault — told us the roof had ten years left and to save our money. We'll never use anyone else."Raj K. Roof survey · Reigate
Good to know
For a typical three-bed semi in the South East, a full re-roof in concrete tile usually lands between £7,000 and £10,500, with clay and natural slate costing more. Size, material, access and what we find under the old tiles all move the number — which is why our written quotes are fixed, itemised and free. For a quick ballpark first, try our roof cost calculator.
Most full roof replacements take five to ten working days: a day or two to scaffold, three to six on the roof itself, then snagging and a thorough tidy-up. Weather can stretch that — we never strip more roof than we can make watertight the same day, so your home is protected even if the heavens open mid-job.
Our rule of thumb: if less than about a quarter of the roof has problems and the timbers are sound, repair it. If the underlay has perished, tiles are failing across every slope, or you're paying for repairs every winter, replacement is usually cheaper over ten years. We always price the repair honestly first and show you photos of what we've found.
Yes — it's a big part of what we do every winter. We make the roof safe first, then provide a dated photo report and written scope of damage in the format insurers want, and we're happy to speak directly with your insurer or loss adjuster. One tip: photograph any damage from the ground as soon as it's safe to, and note the date of the storm.
It depends entirely on the system. Modern GRP fibreglass and EPDM rubber, properly installed, last 25–30 years and often longer; high-performance felt around 15–20. The old pour-and-roll felt that gave flat roofs a bad name managed about ten — if your flat roof dates from the 80s or 90s, it owes you nothing.
Genuinely bad, unfortunately. Moss holds water against the tiles, which freezes and cracks them in winter; it lifts tile edges enough for wind-driven rain to get underneath; and it slides off in clumps that block gutters. We remove it by hand with a soft biocide treatment — never a pressure washer, which does more damage than the moss ever could.
Call and speak to a roofer now, or send a photo and we'll tell you what it likely is and what it likely costs.
Give it a moment and tap again — or call us now and speak to a roofer straight away.
01293 387 599