flat roof

One of the many little gems I've come across when renovating my house is that my flat roof is a cold roof - the insulation sits directly upon the plasterboard with a gap above between the insulation and actual roof. I'm contemplating converting this to a warm roof as I may as well do it now...

Hi All I am looking to buy a semi-detached property which currently has a rear ground floor extension (extension also goes slightly down one side of the house) and as the roof needs re-felting etc. I would like to know/clarify whether changing this roof to a pitched roof would require Planning...

Hi, hope I have posted in this in the right section of the forum.. i'm getting a loft conversion built - the builder has put 25mm of insulation above the joists and 120mm inbetween the joists in the flat roof. he's said this makes it a warm roof therefore it doesnt need any ventilation.. is...

Hi all, We are having a single story extension built. The house was originally built as one of a pair of similar properties in the late 70s. Our neighbours already have a single story extension with a flat roof and parapets. Due to this, we opted to go for the same style of extension to keep...

My wife has very kindly volunteered me to replace my mother in laws flat roof. Last year one of her neighbours was doing some painting outside and it appears he damaged the roof (which I'm guessing was already rotten). So my plan is to remove the existing felt and ply and replace in reverse...

Hi Everyone, First post so please be kind :-) Seeking some advice to change my corrugated roof to a flat felt system. My garage is joined to the neighbours. Currently the plan is to remove the roofing sheets, add a new lintel over the garage opening, add strengthing battons every 4ft to the...

Hi all, I'm building a timber framed garden room with a flat warm roof. my build up for the roof will be: joists 18mm OSB3 sub-deck vapour control layer 100mm foil backed celotex GA4100 or similar 11mm OSB3 top deck EPDM My questions are: 1. Do I need a VCL considering the foil on the...

Planning on using a torch on cap sheet direct to fresh osb without using the recommended underlay...is this a bad idea? If the cap sheet is bitumen backed and therefore fully water proof and has good adhesion to the osb I'm struggling to work out what the underlay actually does...unless I'm...

Been looking for weeks but cannot find any specific details on this; I'll try to explain but apologies if I waffle. I'm building a garden studio, timber frame, without overhang. The top of the cold roof has 25mm air gap above celotex insulation then osb roof, then will be epdm. The walls have...

About to wrap my timber framed garden office with the breathable membrane and battens but am unsure how the edge detail is finished with an EPDM roof. The cold roof rafters end flush with the stud wall rather than any overhang. If I go by the limited diagrams seen so far (see attached), then...

I have searched high and low and not been able to find a solution to my problem. I want to convert my garage to a bedroom. It is the link between two bungalows with traditional pitched rooves. My problem is that the joists run at a right angles to the normal path of cross ventilation, across...

Hi all... hope you can help, I'm finding conflicting information online! I'm about to put a GRP warm flat roof on an outbuilding, I'm using 100mm PIR foil backed insulation and was wondering do I need a deck between the joists and insulation or only one above the insulation (the joists are at...

Hi, we are in the process of buying a 1960s Bungalow that has a 6% pitch flat roof. According to the survey, it recommends replacing the roof some time soon. I've enquired about replacing this with Single Ply Sarnafil but have been quoted £25k.Having done a bit of online research I came across...

We had a new 45m2 warm construction flat fibreglass roof installed in October. It makes intermittent loud banging and creaking noises. It is worse during the morning and evenings when the sun rises/sets and the temperature rises/falls. The roof is south facing. I have found numerous old threads...

Hi all I've bought some celotex insulation to put up on the ceiling in my garage but I'm not quite sure on the ventilation. I want to place the whole sheets underneath the joists to seal the roof structure from the garage room. This is a cold roof configuration I understand. I'm not living in...

Hi Sorry for the vague title, I have rain somehow get through and starts to seep down the plaster by my living room window My property is a flat roof terraced, it has hardly any brickwork because it has one whole length of wall between two columns of brick that separate me and my neighbours...

Hi all, I've just done my first flat roof and I've left noggins to pick up the Fascia's where the joists run parallel to the wall. The joists overhang at the front also for the fascia. The brickwork is two course higher on the outside so I could have a smaller fascia board by the time the warm...

Hi all, I'm putting 10 x 2 joists in for a flat roof. The span is about 3m from wall plate into steel and then the same out of the other side of the steel to the fascia. The steel section is 254 tall so I've gone for 10x 2 to give a flat roof and a flush ceiling. Can anyone advise on the...

hi all, just wondering if anyone can help with a little roof issue a workmate has, he's had an extension that has an almost flat roof(slight pitch) which butts up against the pitched roof of the garage, currently theres a 200mm brick upstand to the rear of said flat roof, the tiles from the...

Hi all, I’m having a flat roof on an extension I am building and the area is approximately 8m x 6m - 48m2 (not taking into account the skylights) please can anyone recommend a roofing system that’s suitable for large areas such as this. It will be visible from the upstairs windows but I...