Hi, hope someone has experience on this!!
I'm in the process of (slowly) renovating our house, and being winter would like to increase the 100mm of loft insulation to the max levels to reduce heat loss. Last week we also had a couple of rooms re-plastered, putting a lot of water and condensation into the house. Being worried, I have been checking in the loft to see if there was condensation forming in the existing insulation and what effect this might have as it's been cold recently.
What I found was that some of the insulation felt slightly damp, but more so, when I moved some of the boards I have been using to line the floor enabling me to store things up there, the underside of the melamine faced boards were soaking wet, being the first cold surface the moisture had come to.
I would like to increase the insulation across the entire floor space, but in one particular area of the loft I would still like to be able to use the floor space. I thought of using polyurethane boards protected by chipboard to keep the storage space but also having the maximum levels of insulation. The rest of the loft will be filled with an extra 170mm of mineral wool.
My question is: As polyurethane boards are foil backed, will condensation form under the boards risking the rotting of the the structural timbers etc.?
Or is there an alternative way of doing this. Some of the ceilings will need replacing (most likely with foil backed plasterboard) but some will stay as is.
I'm in the process of (slowly) renovating our house, and being winter would like to increase the 100mm of loft insulation to the max levels to reduce heat loss. Last week we also had a couple of rooms re-plastered, putting a lot of water and condensation into the house. Being worried, I have been checking in the loft to see if there was condensation forming in the existing insulation and what effect this might have as it's been cold recently.
What I found was that some of the insulation felt slightly damp, but more so, when I moved some of the boards I have been using to line the floor enabling me to store things up there, the underside of the melamine faced boards were soaking wet, being the first cold surface the moisture had come to.
I would like to increase the insulation across the entire floor space, but in one particular area of the loft I would still like to be able to use the floor space. I thought of using polyurethane boards protected by chipboard to keep the storage space but also having the maximum levels of insulation. The rest of the loft will be filled with an extra 170mm of mineral wool.
My question is: As polyurethane boards are foil backed, will condensation form under the boards risking the rotting of the the structural timbers etc.?
Or is there an alternative way of doing this. Some of the ceilings will need replacing (most likely with foil backed plasterboard) but some will stay as is.
