Hi
I am building a flat roof on my back extension.
I am building a flat roof and above the timber joist i am putting OSB3 board 18mm than with this vapor proof barrier https://www.ebay.co.uk/itm/115612903087 not sure if its the correct item i have bought? If someone can help me that will be great and if its correct do i need to put anything to stick it down?
after the vapor proof barrier i am putting Celotex 150mm PIR insulation (taping the joints together with aluminum foil tape from top and fixed with screw from insulation to OSB 3 bord.
above the insulation i am putting OSB 3 board again and on top of that will be felt.
if someone can help me with the vapor proof barrier as stated above as that where i am thinking i am going wrong.
I am building a flat roof on my back extension.
I am building a flat roof and above the timber joist i am putting OSB3 board 18mm than with this vapor proof barrier https://www.ebay.co.uk/itm/115612903087 not sure if its the correct item i have bought? If someone can help me that will be great and if its correct do i need to put anything to stick it down?
after the vapor proof barrier i am putting Celotex 150mm PIR insulation (taping the joints together with aluminum foil tape from top and fixed with screw from insulation to OSB 3 bord.
above the insulation i am putting OSB 3 board again and on top of that will be felt.
if someone can help me with the vapor proof barrier as stated above as that where i am thinking i am going wrong.
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