Flat Roofs
Full replacements on extensions, garages, dormers and terraces, built up in three bonded torch-on layers exactly like our Chatham job.
Flat roofs →
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Roofing across the Medway towns, rated 5.0 from 200+ Google reviews. Our most recent Medway job was a full flat roof replacement on a rear extension in Chatham, completed in July 2026 and photographed stage by stage below. Free inspection, fixed written quote, 24hr callout.
Plenty of roofing companies will tell you they cover Medway. We would rather show you a roof we finished here. In July 2026 we replaced the flat roof on the rear extension of a house in Chatham, and the whole job was photographed from the first board coming off to the handshake at the end.
The old covering came off and the roof was stripped right back to the joists, which is where the real story was. The deck was saturated and several of the joists underneath had rotted. Felting straight over that would have looked fine for a season and then dipped, split and started letting water in again, with the rot spreading quietly the whole time. Every failed timber was cut out and replaced with new treated timber before anything went back on.
Then it was built up properly: Superglass mineral wool insulation between the joists, a new SterlingOSB Zero deck laid over the top, and a three-layer torch-on felt system finished with a mineral-finish grey cap sheet. The upstands, the wall abutments and the threshold at the patio doors were all dressed and flashed, and the adjoining raised terrace area was covered in the same system so the two surfaces run as one. It is covered by our company workmanship guarantee.
Most failed flat roofs in Medway did not fail at the surface. They failed underneath it, months before anyone noticed a stain on the ceiling.
Timber that has taken on water does not dry out under a new covering, it keeps rotting. We strip back far enough to see what we are dealing with and replace what has failed, which is why the Chatham roof got new treated timbers before a single sheet went down.
Torch-on felt is only as good as the board beneath it. A fresh SterlingOSB Zero deck gives a flat, solid surface for the layers to bond to, instead of a soft old board that flexes every time someone walks on the roof.
Each layer is heated and bonded to the one below, so nothing has to be nailed through the finished waterproofing. Every mechanical fixing through a covering is a hole, and the mineral cap sheet on top takes the UV that turns cheap felt brittle.
Medway is not one town, it is five running into each other along the river, plus the estates on the hills behind them. The housing changes street by street and so does the roofing work.
Chatham is where our most recent Medway job was completed, a full flat roof replacement on a rear extension. Terraced and semi-detached houses here very often have a rear extension, an outrigger or a garage with a flat roof on it, and those are the roofs that get patched for years instead of replaced once.
Gillingham runs straight on from Chatham, with long runs of terraces and inter-war and post-war semis. Same story on the roofline: pitched roofs at the front, flat roofs and lean-tos out the back.
Rochester has the oldest housing in the group, and older properties bring slate, clay tiles, valleys and leadwork rather than a simple strip and re-cover. Strood sits across the river with a mix of older terraces and newer estates. Rainham is largely post-war and later, so it is fascias, guttering, garage roofs and dormers as much as full re-roofs.
Walderslade and Hempstead sit up on the higher ground behind Chatham and Gillingham, where the estates are newer, the plots are more open and the wind gets at a roof from every side. Ridges, verges and flashings are usually the first things to go up there.
Not on the list but close by? Call 07777 735785 and we will tell you honestly whether we cover your street.
Flat and pitched, repairs and replacements, all carried out by our own team rather than subbed out to whoever is free that week.
Full replacements on extensions, garages, dormers and terraces, built up in three bonded torch-on layers exactly like our Chatham job.
Flat roofs →
Leaks traced to where the water actually gets in: failed upstands, tired flashings, slipped tiles and split coverings, then repaired properly.
Roof repairs →
Full re-roofs in tile or slate, stripped and rebuilt with new underlay, battens and a dry ridge finish where it is the right call.
New roofs →The Chatham roof on this page is ours, photographed at every stage including the parts most companies would rather you did not see. Nothing on this site is bought from a photo library.
Cornelius owns the company and handles every enquiry himself. He was on the Chatham roof at handover, which tells you where the owner of this business actually spends his time.
We look at the roof, tell you what it actually needs and put a fixed price in writing before anything starts. No day-rate creep, no extras discovered halfway through.
Leaks and storm damage answered around the clock. We make the roof safe first and quote the permanent repair afterwards, rather than the other way round.
Fully insured, with a company workmanship guarantee on the work we complete. Seal Pro Roofing Ltd, Company No. 15914993, so you know exactly who you are dealing with.
A 5.0 Google rating built on 200+ reviews from homeowners who let us on their roof and would do it again. That number is the whole business plan.
"Seal Pro Roofing did a superb job on our roof replacement. They were punctual, tidy and kept us informed throughout. The workmanship was excellent and the price was fair. Very impressed with their customer service and would happily use them again in future."
"Seal Pro Roofing did an outstanding job on our roof. The staff were courteous and clearly skilled. They worked efficiently and completed the job to a high standard. Everything was left clean and tidy. Excellent service overall."
Tell us about the roof and we will arrange a free inspection and a fixed written quote. If the deck or the joists have gone, you will hear it from us before you spend a penny.
Tell us about the job, we usually reply within the hour.
Prefer to talk? Speak to Cornelius on 07777 735785 or 01753 415 442
Free written quotes. 24hr emergency callout. A local team rated 5.0 by 200+ homeowners.
