Search results

hi its a lean to roof with gable and 1 abut wall. shallow pitch of 12.5 degrees with correct tiles to suit pitch. rubershield trade doesnt need any extra vents, the BBA confirms that and their technical dept. unvented cold roof, profiled tiles, 25mm batten, breathable membrane, min 25mm...

rubbershield is being used. i have spoken to manufacturers who agree that no extra ventilation is needed, however they were 50/50 on weather fascia vents would help or not. they confirmed that the breathable membrane and tiles being used was enough on its own. the argument for fascia vents is...

woody - thanks, will leave it out.

hi yes thats what the recommendation is for, to achieve a bit more of an airtight room. if the sides are lapped up the walls and under the plasterboard, or even taped to the walls before its dot and dabbed then this will help a little i assume. some may argue that its a bit of a waste of...

thanks. some guides do suggest a polythene sheet over the joists. its not required but some recommend it?

hi, its ventilated by breathable membrane. no further vents needed

hello there is a new room over the garage in the extension. plans show this as having 100mm kingspan in the ceiling/floor. this is a room over a cold space below. its got 225mm floor joists and one inspector said i could put 200mm insulation quilt / rockwool style insulation in instead...

hello i have 100mm full fill cavity bats in the walls of a new extension. the roof is a shallow pitched roof. the insulation in the roof is going to be a warm roof design of profiled tiles, breathable membrane, 50mm air gap (i know only 25 is needed), 75mm kingspan between rafters, 50mm...

Hi In my extension i have a pitched roof with a flat horizontal bit at the top. I wanted to keep as much height as possible. The kingspan is 75mm between rafters and 50mm under. This runs right upto the UB ridge beam and the beam protrudes down, to white 4x2's are fixed touching it...