Flat roofing in Winfrith Newburgh

The survey follows the water. That is how we look at a roof in Winfrith Newburgh, and it finds the fault more often than staring at the covering does. Across the deck, into the outlet, through the hopper, down the pipe. A silted outlet stops the first stage and everything backs up behind it.

After that come the ordinary faults: a fold that has cracked, a blister risen and burst, a lap that has opened, a trim off its fixings, an upstand gone perished. Hours rather than days, all of them.

Re-covering. A surface that no longer bends comes off. EPDM rubber goes back as one bonded sheet with nothing crossing the field, which suits a plain garage. GRP fibreglass is laid wet and cures to a single skin with its own trims, so it takes traffic. Torch on felt in three built up layers under a mineral cap sheet handles a roof full of upstands. Single ply is welded at the joints and belongs on a large span. Two to three working days for a garage or a small extension.

Deck and build up. Plywood, OSB, chipboard or older boarding underneath, and the chipboard is what usually softens. Firm decking gets covered over, soft decking comes out and the joists are inspected while they are bare. Water standing about after rain means no fall was cut or the outlet is buried, and firrings or tapered insulation correct that before anything new is laid. On a rebuild the insulation goes above the deck as rigid PIR with a vapour control layer beneath it, holding the timber above the dew point and leaving interstitial condensation nowhere to happen. That is what BS 6229:2025 on flat roofs sets out and what Approved Document L asks for where a room sits below.

Edges, openings and abutments. An upstand with a cover flashing chased into the wall, an apron in lead where lead is already there, a cavity tray where there is a cavity, and parapets and copings taken as part of the roof. A kerb built to carry a rooflight, a lantern, a Velux, a hatch, a soil pipe or a vent pipe. Then the drip and the edge trim, and below them the gutter, the hopper and the downpipe, which on a small roof matter more than anything in the middle of it.

Thomas comes out to Winfrith Newburgh, gets onto the flat roof and lifts a corner of the old covering to see the deck. His quote then sets out how we get up there, stripping the old felt, any new deck boards or firrings, insulation, the new membrane, and each upstand, outlet and edge trim, with taking it all away as the last line. Every part comes under one written quote.

Out in Winfrith Newburgh the flat roof is often a garage, a porch, a rear extension or a link between two older buildings. A tower usually does for single storey work, set on boards where the ground is soft. Anything above a two storey wall needs a scaffold. We plan the day around the forecast, and the roof is never left open overnight. Old felt is bagged and goes with us each day. Where the joists under a wet deck have rotted, Thomas shows you on his phone and gives you the added cost before any are replaced.

A re-cover in the same form is maintenance, and Planning Portal guidance marks the limit. On a listed building check listed building consent first, and ask Dorset Council about a conservation area if the roof shows from the lane. Where a new deck goes over a habitable room, building control come in under a building notice or an application with full plans, and the insulation has to meet Approved Document L.

Ring us, as the form takes longer. A split, a blister or an upstand lifted by wind lets water straight onto a ceiling, and the deck keeps soaking after the rain stops. Catch the drips, empty the room below and stay off the roof.

On the first visit we find the entry point and cover it with a temporary patch or a weighted sheet, then price the permanent job once we can see how much deck has gone. We run booked work Monday to Friday, 8am to 6pm. If water is coming in, phone us, and if we miss you we call back as soon as we can.

Call now: 07435 839745

Parts of Winfrith Newburgh sit in flood zone 2 and 3, with the Win running close by, and that changes one thing about a flat roof: the outlet is not the end of the story.

On a low lying plot with a high water table, a downpipe running into a soakaway often has nowhere to soak away to during the weeks when it matters most. The water backs up the pipe, the outlet on the roof stops taking anything, and you get standing water on a roof that was laid perfectly well. the government flood risk service will tell you what applies at your address.

So when we look at a roof in Winfrith Newburgh we follow the water all the way down: the fall across the deck, the outlet, the hopper, the downpipe and where it finally discharges. If the ground cannot take it, the answer is a positive outfall to a drain rather than a bigger soakaway, and Approved Document H covers how rainwater drainage should be dealt with. It is also why we would size an overflow into the detail on a roof that has only one outlet. One blocked gully should not mean a ceiling.

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