flat roof

Hi all, I'm building a single skin brick garage. The garage is 6.1m long and 3.1m wide. I need some advice on getting the roof started. I'm planning to put the joists accross the shorter span and have the fall going towards the back of the garage. I will be using 47mm x 175mm C24 timber for...

We have a flat roof on our ground floor which acts as a large bay area to our living and kitchen area. It's approximately 5 meters by 2.5 meters. We have an issue in that the builder (who has since done a runner but that's another story) mis measured our steel and had to fit new steels after...

Hi I have an old flat roof which is failing. The roofers have stripped the felt and replaced some of the OSB. Underneath there's a (to my mind, not well constructed - e.g. gaps in insulation/no foil taping) cold roof, using PIR (I'd guess 75 or 100mm). The roofers have put on a VCL and PIR...

Hi Folks, I've got what is essentially a shed attached to the side of my semi, it's got a decaying flat felt (part torch on, part patched) roof and it needs replacing, but I'm also planning on making better use of the space so want to give it some insulation. The building is 2.3 meters high...

Hello, I am currently having a rear extension built and have had a warm flat roof installed. It is only now however that I have realised the wall insulation is supposed to carry on up to meet the base of the warm flat roof!! What would be the best way to insulate this gap before plasterboard...

I am after some help if possible on the below situation. I have a 1950s semi detached house and I am looking to convert the garage into livable space. It’s currently got an asbestos roof which I’ll have removed and disposed of. I need best advice as how to have the new warm roof. It’s 6 meters...

Hi Everyone, First time posting here, so sorry if I'm not doing something right. I bought an old (1919) house in June last year and have started some renovations in the meantime (new bathroom and new insulation), which are almost done. But after removing the roof fascia of the flat roof from the...

I would like to have a flat warm roof for our new extension but as the our house has a pitched roof am not sure how the abut the too as the exterior walls will be flush and so the large flat roof fascia, deck and insulation will cut awkwardly into the pitch roof and i am not sure it is even...

Hello I have recently recovered a flat roof dormer with Sika Sarnafil here is my video covering the project has anyone else used this product before ? Loft Dormer Flat Roofing Don’t Worry We Are Professionals Sorry about the title couldn’t think of anything

I had my flat roof completely re-done a few weeks ago. Stripped down to the joists. New boards and 3x layers of felt. Then it rained and this happened. The roofer said pooling is normal but I’m worried that there are lots of joins in the felt that could open up and there is such a lip on the...

I need advice for a solution for a totally botched job by some roofer cowboys. They said they would fix the issues with my terrace leaking by using liquid rubber. The fibreglass terrace floor was to be replaced by these guys. However instead of stripping off the previous floor and boards then...

Hello. When I look at construction details for warm flat roofs I see the VCL is placed above the joists. However for a warm pitched roof the VCL is placed below the rafters. For example see the attached image from...

Hi all, I moved into a property a while back and it's got a kind of lean to building attached to the side. It's essentially a custom sized insulated (poorly) shed. I've had a ton of issues with the roof felt leaking at one end and despite some rather rushed patching I'm not overly confident in...

Hi all Currently renovating our bedroom. We have a bay window which has leaked on and off. We thought we fixed the leak by painting some of that liquid roof stuff on and repointing the stone. But there's been heavy rain and I think the internal drain is failing now. I noticed the damp again...

Hello, We’re figuring out the design for our crown roof - something like the attached image, where we have a flat part on the top (with appropriate fall to stop water pooling), and then it would be pitched on three sides. Would this kind of roof be better as a cold roof or warm roof? I...

Hi all, I'm planning on having a flat roof extension (5x3m) with a parapet style walls but stuck on height requirements for the parapet wall. I'd like to have the parapet style walls with either stone or metal coping to avoid having plastic trims/ visible gutter pipes/etc. but I'm having...

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...