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Hi Is it acceptable to use Kingspan K17 Insulated Plasterboard against an outside wall of a 1930's semi (in the living room, Hall and Bedrooms), with little or no cavity, for added insulation? Apparently this can be dot and dabbed directly onto a wall. Also...... Is the Kingspan K17...

Hi I've attached a photo of what the issue is. Ultimately we are buying a house and we have just noticed that the roof has a bit of sagging over the open rafter eaves. Half of the rafters appear to project out from the wall as expected but half don't appear to be there. What could be the...

Hi I'm looking at putting a double winder staircase off my landing over the existing staircase and into the loft. There is more than enough head height in the loft for this and rough calcs/measurements show that a double winder staircase should fit within the designated space. Can anyone...

Hi The three way diverter valve on my Y type system appears to have stopped working. The symptoms are: When the system is turned on at the time switch the CH and HW both work i.e get hot. However when the thermostat is turned down the CH (rads) remain hot. The thermostat has been...