Hello,
i'd like to fit internal wall insulation to one of the bedrooms in my victorian semi. I plan to install it throughout the house as i do up each room. A builder did two rooms already (as part of a wall/chimney removal) and he did it with metal studwork, kingspan and plaster board. He didn't tape the kingspan joints to maintain the vapor barrier and left a large gap between the brickwork and the kingspan circa 75mm.
The room I am doing is fairly straightforward 1 flat plastered external wall , 1 centrally located sash window , and I was going to do the kingspan tight to the plastered wall, tape the joints , seal the perimeter with expanding foam and then plasterboard... I'll probably use metal studding to support the plasterboard but make sure it doesn't contact the external wall... i.e. 50mm studding , 80mm kingspan
My question is about the detail around the floor boards / joists. The joists run parallel to the wall and my plan was to cut back the floor boards where they overhang and fill the gap between the wall and the joist with insulataion/ and or expanding foam... however I've realised there is a flat roofed bay window in the room below which means that there is a wooden beam in the wall (below the floorboards) which is supporting the external wall that I am talking about doing. If I insulated between the last joist and this beam it will leave this wooden beam on the cold side embedded in the wall. Am I better off accepting that I cant do a full job on a period property like this and just do the area of the wall above the floorboards?
p.s. any other advice on fitting IWI is much appreciated!! If the joists ran the other way into the wall what is the best approach/ current thinking?
i'd like to fit internal wall insulation to one of the bedrooms in my victorian semi. I plan to install it throughout the house as i do up each room. A builder did two rooms already (as part of a wall/chimney removal) and he did it with metal studwork, kingspan and plaster board. He didn't tape the kingspan joints to maintain the vapor barrier and left a large gap between the brickwork and the kingspan circa 75mm.
The room I am doing is fairly straightforward 1 flat plastered external wall , 1 centrally located sash window , and I was going to do the kingspan tight to the plastered wall, tape the joints , seal the perimeter with expanding foam and then plasterboard... I'll probably use metal studding to support the plasterboard but make sure it doesn't contact the external wall... i.e. 50mm studding , 80mm kingspan
My question is about the detail around the floor boards / joists. The joists run parallel to the wall and my plan was to cut back the floor boards where they overhang and fill the gap between the wall and the joist with insulataion/ and or expanding foam... however I've realised there is a flat roofed bay window in the room below which means that there is a wooden beam in the wall (below the floorboards) which is supporting the external wall that I am talking about doing. If I insulated between the last joist and this beam it will leave this wooden beam on the cold side embedded in the wall. Am I better off accepting that I cant do a full job on a period property like this and just do the area of the wall above the floorboards?
p.s. any other advice on fitting IWI is much appreciated!! If the joists ran the other way into the wall what is the best approach/ current thinking?