flat roof

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...

We have a ground floor extension with a flat roof. There is a damp area in the corner. The ceiling use to be wet but we had this fixed and so the ceiling is never wet anymore.The damp never gets any worse even in heavy rain but also doesn’t dry out. The Celcon bricks are exposed at present so we...

Our builder told us he used glue to attach treated wood over flat GPR garage roof in order to extend our pitched porch roof over front of garage (he built the frame in wood and glued it over the GPR flat roof). Is this acceptable, to use glue to attach wood? My concern is that its not strong...

Good evening. We have submitted a lawfulness certificate to convert some outbuildings connected to the house which include an integral garage/stable type space and an outside toilet and coal store into a kitchen diner and utility. The planner is fine with the majority of the application but we...

I am putting a new flat roof on a brick built garage, stage 1 is to get the roof watertight and stage 2 next year is to make it into a green roof, probably sedum. The garage is approx 5.25m x 3m with joists to run across the width (3m) I have been looking at some of the weight considerations...

We are in the process of having a huge dormer built. The approved drawings the builder is working from says single layer membrane roof covering bonded to19mm plywood, also sides from 25mm plywood (exterior grade ply). The builder has used 11mm OSB3 board all over (also gaps all over between...

Hi My house was built in 1950, it has a single story extension with a flat concrete roof. The roof does not leak but has always had condensation on the inside through the winter due to not being insulated. Whilst renovating I have removed some plaster from the ceiling and found that some of...

Hi Guys, new to the forum and DIY in general. Note, I have no DIY experience at all, except for assembling home furniture. I had a garden building built in 2018, and now the flat felt roof has already failed and caused a massive leak inside the building. Large puddles form on the roof, and...

Hello all, I have a flat felt roof Garage, which is in the middle of a large block. There’s a substantial amount of water ponding on top in a bottom corner. (I cleared this today along with cleaning out the guttering) There’s no guttering at the rear where the ponding is, only at the front so...