flat roof

I've got a single skin building, wall plate is on and it will have a cold roof. Where do I position the first joist and the last joist? E.g. How do I create an overhang for drips on the side but also have a place to stick the edge of the ceiling plasterboard? Front and rear overhang is...

Hi, Hopefully somebody can give me common sense advice on a problem I'm having. I lost all hope. The picture shows a flat PVC roof over my back bedroom before the hole was cut out. I don't have a current picture, but it was leaking a bit in one place and a rouge contractor cut out about...

My garage is about 5 years overdue repair and i’ve recently been cutting out and replacing the qworst affected OSB (sagging/ponding) with fresh boards, refelting and sealing gaps & overlaps with Cromapol. Where there are very small ponds I plan to fill these with a bit of Cementone, then cover...

Hi, I have a single-skin brick extension with a concrete flat roof from the 50s/60s that I’m getting re-covered. The concrete roof overhangs the exterior by 100-150mm. I’m trying to decide whether to go warm or cold roof. I originally thought warm but now I’m concerned about potential...

Hello, everyone. We need to get a flat garage roof - with a large upstand at one end - replaced. It's a double-length garage, and a decent width (i.e. you can still get a modern car in it) so a large area. The woodwork underneath appears to be in generally good condition apart from some...

Hi all, Really hoping you can help with a problem with the roof of my newly converted loft. I had a torrid time with the build (over budget, overran, had to do loads myself) but it has been generally finished and has been signed off by building control. The loft conversion is a full width flat...

My new(refurbished) bathroom roof is going to be, corrugated metal and Plastisol, 12mm structural exterior ply (fibre glass sealed and planning exposed beams(mono trusses). Can someone direct me to a site showing insulation design and detail options, please.

I've got an old flat roof on my extension that is well due a change, it's not leaking but it's definitely dry and cracking in places and has a carpet of moss on it. We're planning on replacing the roof when we have the bathroom in the extension done next year. I've started to remove the moss...

Hi all, I am planning to build a garden room which will be 6.6 meters wide and 5 meters long/deep. I have managed to find joists that are 6 meters long which will give me the overhang on the front and back. The roof will then have firring strips on top, 18mm OSB board and then EPDM rubber on...

We've got a flat roof on top of our apartment block that is approx 30 years old, and are looking for general advice on maintaining it, as we are concerned about the discoloration. Some basic questions we have are: - What is the roofing material? Zinc? Tin? Lead? Something else? - Is the...

Hi All I am planning ahead in regards to my flat roof for the garage. It is completely isolated in the garden and there are no walls on either side to use the bolted wall plate. The builder is in process of laying the block work sometimes this week. I have watched EPDM videos on youtube and it...

Had a leak from upstairs downpipe so fitted a new rubber boss. First time popping my head into garage roof hatch since moving in. See photos I’m thinking of tearing the remains of the garage flat roof out and insulating and boarding for storage. Will I be ok removing the short vertical...

Hello We had a a leak in the kitchen. The roof above is a flat roof on the kitchen extension The best I can work out the problem is on the wall/roof junction. Specifically behind the soil pipe. There is no leading on the wall/roof junction behind the soil pipe. It looks like the roof felt or...

Hi. We have had a flat roof kitchen extension built, with EPDM and two skylights. The company that built it pulled out of the project neat completion, it was really weird and I don't know why they didn't finish it but I get the feeling that they misquoted and were just cutting their losses at...

Hi, I'd appreciate anyone's thoughts or suggestions or recomendations. I have a crappy old conservatory that needs something doing. Also it's too hot, so my thinking is to convert it into a garden / sun room. It's currently a lean-to with the left side wall being the garage wall, so the front...

Alright ladies, I am planning a garden office build with a flat roof within 1m of a boundary and want to avoid a cold roof and the issues that come with them, especially as I want downlights. I have more than enough 50mm PIR board that I have pulled out of my roof (crap, non-compliant loft room...

Hi, I want to keep the roof height to a minimum and thus planned to install a cold roof rather than a warm roof. Because this requires venting, which can be problematic, the inspector suggested an 'inverted warm deck' / hybrid. The cold roof plan was to put in 100mm of insulation between...

Hi Everyone, I just had a quote from a builder, and it astonished me. I'm not looking for any specifics here, but I'd be interested to hear anyones thoughts. Im looking to knock down an old carport (3m square) replace it with a small porch extension, same size but with a pitched roof that's...

Hi :) I have just bought a house in need of much renovation! One room is flat roof and I am unsure if I need to add any insulation between the rafters or if there is a layer of inuslation above the boards and the space between the rafters is for air flow. Any advice welcome :) Thanks

I have a patch of flat roof where the felt has ripped off exposing the plywood deck. As this is an unheated shed roof which will be in need of proper re-roofing soon, I want to do it as quickly and cheaply as possible - e. g. Bostik Roof repair brushed over the ply and lapping over the...