flat roof

Hi there! I am about to replace the flat roof above a bay window, removing the felt as it is starting to leak/deteriorate, and replacing it with a GRP one. I have a few questions and don’t know whether anyone can help?! I have attached a few photos of the existing roof. 1) The roof has a...

Hi, I am currently renewing a large cold roof which has rotted from the inside, no ventilation or vapour barrier with a GRP top. The roof is on a dormer where the roof joists joined directly onto to the ridge beam with no ventilation and no scope to convert to warm roof due to ridge height. The...

I had a new lean-to garage built two and a half years ago. It seemed to be a good job and I was very happy with it. (Only minor glitch I was aware of was that the roof has always ponded at the back, which is visible on the photo below but not related to the main problem). However, earlier...

Hi, a friend has recently used and recommend a paint on liquid rubber roof membrane called mono bullet roof. It sounds too good to be true as the application of it is very easy making it ideal for any DIY’er, simply roll the product on to a new ply deck. Also will save a lot in money. I plan...

Hi, I am in process of replacing my existing flat roof with new pitched roof. After much thought, apex type pitched roof will be best option for this kind of structure. It is for kitchen extension at the back of the property. Photo attached. Following are the measurements: Length (from the...

Hi, I got a kitchen extension which is 5 meter long and currently has flat roof (which I am sick and tired of it as its leaking all the time + it looks ugly). So I was thinking about replacing it with mono pitched roof but I am not sure given the meaurement if its possible. Length of the...

Hi all, After years of hanging around this site, I finally have a big enough project of my own to share. I am building a garden room (yes... it's another garden room post) with a view to discovering if I can learn enough skills to eventually build my own timber frame house extension (which I...

Hi, Just after some thoughts on Rsj sizes for a flat garage roof Garage is new built single skin 6.5m x 6.5m and its got 2 pillars on the left wall and 2 pillars on the right wall evenly spaced out @ 1/3rd & 2/3rds of the way, So will need 2 Rsj's to support 6"x2" joists (400 centers) with 18mm...

Hi Wonder if anyone can advise, I have a rubber flat roof, but it has now cover flashing installed. Wondered if it's advisable to have some installed and are there any codes or specs that are advisable? Do you know roughly how much you'd be looking at getting it done? Approx 8-10 metres in...

Hi Wonder if someone can give me some advice. We had a new flat roof installed last year and it looks a good job by a reputable company. We discovered a leak recently and they come to look at it and added some sealent over the existing seal. I'm a bit concerned this isn't the best remedy if the...

Just moved in to a 1950 build house and was hoping someone could give some advice. I’m a long time reader of the forum but this is my first post! I’ve started working on a room in the house which I believe used to be the garage - which has been converted into a room attached to the house at...

My parents have had a porch built with a flat roof cut into the existing pitched roof. The walls are damp externally so I took a quick look at the roof and thought it looked rough. The dampest part is to the left of the front door. The builder has come back and squeezed a tube of silicone in...

DAMP BELOW PARAPET ON FLAT ROOF Hi! Was hoping anyone on here could contribute helpful advice and diagnosis as my family are suffering and the situation is getting us all down. We have a damp problem on our front elevation wall (first floor) which sits below a parapet wall, - the parapet...

Hi All, We have a flat roof over the porch, and there has been some water getting in over the past few weeks. It is a 50s concrete flat roof, and although you cant see from the pictures there is a drip groove which does filter a lot into the guttering. There is still a fair bit still working...

Ive had a quote to replace lead which is between the house and a flat fibreglass roof (which is also a fairly large balcony area). The original lead, I am told, was installed wrong, as it wasnt split in to sections to allow thermal expansion and contraction, so it has split. It also seems to...

I appreciate things are hard to explain without pics but here goes. I have a square house with an attached square garage (just say it is the same size as the house) but this is set forward of the house by around 2 metres. I am building a small extension to the rear of the garage so back of house...

This flat top roof porch was installed by a cowboy leaving exposed timber to the elements. I want to reroof it. What is the easiest way to do this without the use of a blow torch?!

Flat roof is in need of some tender love, confused about all the different products. Have tried some before, esp the paint-on ones (Thompson, Acrypol,Cromapol), but not sure they are that effective, esp as they are only a thin layer of paint. Spotted a video about Watco Roofite, not in typical...

Hi, I've recently had a flat roof (warm) installed by a local contractor, who used 100mm Kingspan over the main deck, followed by torch-on felt. BC now advise that the insulation is too thin: 100mm gives 0.22W/m2K, requires 0.18W/m2K. Is that reasonable? What is my recourse? can anything besides...

Hi Our soil pipe stack is leaking from a pipe joint where it enters the flat roof of our extension. I noticed a tiny pool of water on the dry roof when looking out the window today. Photos show pipe joint and leak. Upstairs taps, bath, sink and shower all drain properly but upstairs loo often...