flat roof

  1. F

    Flat roof - felt vs. membrane - pros and cons?

    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...
  2. T

    Pitched to flat roof ridge ventilation - how to do it?

    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...
  3. handcraftedfloats

    Flat Roof Insulation

    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.
  4. Moonhead

    Protect flat roof

    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...
  5. T

    Garden room roof support

    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...
  6. F

    Options to maintain apartment block flat roof

    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...
  7. S

    Garage/workshop flat roof options - Joist hangers or wall plate?

    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...
  8. P

    Pitched roof on top of old flat roof

    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...
  9. S

    Flat roof repair

    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...
  10. N

    EPDM Repair Advice/Products

    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...
  11. TeachMeObiWan

    Thoughts on a beam

    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...
  12. SpaceWorm

    Garden Room Warm Roof

    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...
  13. O

    Inverted Warm Roof

    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...
  14. TeachMeObiWan

    Seems a bit steep ?

    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...
  15. N

    Flat roof insulation advice

    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
  16. S

    Bodging a flat shed roof

    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...
  17. G

    Damp in corner of ground floor extension

    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...
  18. T

    Wood glued over flat roof - will this last?

    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...
  19. Rachael1976

    Conversion of coal shed/outside toilet

    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...
  20. D

    Green Roof Joist sizes

    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...
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