warm roof

  1. 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...
  2. wilco88

    Is this a leak or condensation

    Hi, This is a small flat roof that joins to the house and main pitched roof. Some background info: It has never had any insulation between rafters and doesn't have insulation on top. Timber roof joists/rafters with timber furring. Then plywood and then torch on felt. We discovered the...
  3. G

    Parapet wall

    First of all thanks everyone for helping with my self build, so much appreciated. Next stage complete the parapet wall design,roof timbers on for warm roof.My plan is to complete the top of the parapet wall either side,them fix the roof down. Need to keep the parapet wall to minimum height...
  4. C

    GRP warm roof got wet

    Hi all, I have recently installed a warm GRP flat roof on my extension, the roof is 90m² with a parapet wall all the way around and and a hidden box gutter built in and two 3000mm x 1000mm flat roof. Due to the size of the roof, a few fiddly details and doing it on my own i have had to do the...
  5. A

    Insulating eves with warm roof (Annexxe)

    Hi Garden detached room under construction . Warm roof will be used (18mm osb then 100 celotex then 18 osb) Query : Insulation with the eves at end of joist runs, as there are noggins etc please see attached Before answering - thanks
  6. J

    Warm roofing and GRP Fibreglassing Single Storey Flat Roof

    Looking for advice please. I've got a flat roof single storey bathroom that needs a new roof and I've looked at GRP Fibreglass as the route to go down. I also wanted to insulate the flat roof and have read all the advice stating that a warm roof is superior to a cold roof. If the Celotex for the...
  7. A

    Converting flat roof from cold to warm 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...
  8. T

    insulation boards stacked on the roof

    Hi all, a quick opinion would be appreciated, it is our first (re)build and obviously I have a lot to learn and potentially not everything which looks odd is an issue (this is my behaviour by default! :P ) Came back home to find a bunch of 45mm Kingspan TW50 boards, which will be presumably...
  9. T

    Insulating the fascia of a warm flat roof and VCL / VCB?

    Unfortunately we are already amidst our renovation job, which includes also the redoing of a flat roof and upgrading it to a warm roof and I have a question regarding the insulation of the fascia, I find shocking that there isn't really much material on the web about it! The new joists have been...
  10. C

    Polythene VCL Warm Roof -upstands?

    I have a 15m2 felt flat roof that I am replacing with Warm Roof. Should the VCL be continued up the walls at the edges (it is surrounded on 3 sides by the next storey). If so how do you attach it to the wall? 2 sides are limewash cob, one side painted brick. There will be a lead flashing set...
  11. Bagheera

    Flat warm roof- VCL needed with celotex?

    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...
  12. fatmcgav

    Summer House refurb - Warm Roof

    Afternoon all We've got an existing Summer House at the bottom of our garden that's in need of some TLC. The intention is to try and make the room more usable all-year round, and possibly use it as a small photo studio. Therefore it will need permanent electrics, and ideally some insulation in...
  13. Martin Spindlow

    Warm flat roof - 2 Decks?

    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...
  14. M

    Banging fibreglass roof

    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...
  15. T

    Insulating behind fascia board in between joists

    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...
  16. EdBeard

    Flat roof - botch job or not?

    We've recently had a loft conversion done, with a warm deck roof. Inside the loft the ceiling feels cold. The builder said that's normal. A different roofer has come round and said the flat roof has definitely not been done correctly. Some pics are attached - I'd love to know your thoughts...
  17. S1llyB1lly

    Pitched roof and sarking

    Does anybody here have a good working knowledge of sarking boards in roof applications? :) I'm thinking to go with the following construction on the pitched part of my warm roof (top down): 1. Cupa Heavy 3 slate 2. Counter battens / battens 3. Breathable membrane 4. OSB3 or sarking boards 5...
  18. S1llyB1lly

    Warm roof deck design - is this modification OK?

    I have a roof which is being totally redone from scratch, new rafters, everything. The top is flat, pitched at the sides,l so nothing too complex. Traditionally, a warm deck roof design has insulation sitting on top of the roof, as per image below. My question is this: in between the...
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