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Dry ridge system installation in Windsor, Berkshire and South West London, fitted as standard on our new roofs and as an upgrade on existing ones. Book a free roof inspection and you get photos of your ridge and a fixed written quote before we start.
A traditional ridge holds each ridge tile on a bed of sand and cement. A dry ridge system replaces that mortar with a mechanical fixing. A ridge batten is fixed along the top of the roof, a ventilated roll is laid over it and dressed down onto the tiles either side, and every ridge tile is screwed down through a clip into the batten. Union pieces seal the joints between ridge tiles and end caps close the ends.
The same system works on hips, the sloping ridges that run down the corners of a hipped roof. On a dry hip each hip tile is fixed the same way, with a hip iron at the bottom to hold the line.
What you get:
On a new roof the dry ridge is the last stage of the build. On an existing roof it replaces the old mortar ridge in one visit.
On an existing roof the old ridge tiles come off and the mortar bed is cleared back to the top course of tiles.
A treated ridge batten is fixed along the line of the ridge at the right height for your ridge tile.
The ventilated roll goes down over the batten and is pressed onto the tiles either side to seal against rain.
Each ridge tile is clipped and screwed down, the joints sealed with union pieces and the ends capped.
The ridge is the most exposed line on your roof and, on older homes, the thing we are called out to more than anything else. Mortar expands and contracts with the weather, cracks, loosens and lets go, and then the ridge leaks at its highest point or a ridge tile comes off in a storm. Most of the emergency ridge calls we take are on roofs that were bedded in mortar decades ago.
The current British Standard for tiling and slating, BS 5534, calls for ridge and hip tiles to be mechanically fixed, not held by mortar alone. A dry ridge meets that by design. That is why it goes on every new roof we build, including our recent re-roofs in East Ham, Fleet, Hampton and Kingston upon Thames.
The ventilated roll matters too. Moist air from the house collects at the top of the roof space. A dry ridge gives it a way out, which helps keep your rafters and battens dry for the life of the roof.
On a new roof the dry ridge is already included in the price. Our new roof cost guide covers full replacements, with a 3-bed semi in concrete tile at £7,000 to £11,000.
On an existing roof, converting a failing mortar ridge to a dry ridge is priced in the same bracket as rebedding it. Our roof repair cost guide puts ridge tiles rebedded or refixed at £200 to £600 for 2026, and the length of the ridge, the number of hips and the access set where yours falls. The upgrade makes most sense when the mortar has failed along the whole ridge: you pay once and never repoint it again.
A dry ridge is not the right look for every house. On some period homes in a conservation area a traditional mortar ridge suits the street better, and then we rebed and repoint it with the tiles mechanically fixed as well. See our ridge tile repointing page for that option.
This East Ham re-roof had several hips running down from the ridge. Every ridge and hip tile was clipped and screwed onto a ventilated dry system, with lead dressed in where the hips meet the ridge. No mortar anywhere on the top of the roof.
Tell us about your roof and we will book a free inspection and give you a fixed written quote for a dry ridge, either as an upgrade or as part of a new roof. Ridge tiles loose now? Call us any time.
Tell us about the job, we usually reply within the hour.
Prefer to talk? Speak to Cornelius on 01753 330566 or
Expert Roofer Verified member“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 delivered a great service. The team were knowledgeable and worked carefully to ensure everything was done properly. The roof looks solid and well finished. Very happy with the professionalism shown.”
Complete new roofs stripped to the timbers and rebuilt, with one fixed written price.
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