Hi,
Have an exterior wall (cavity behind it is ventilated with outside air as in roof space), west facing. The old wall is just your standard lime plaster on wood laths that are basically strapped straight to the stone. Want to tear it all down and insulate, as I have had issues with small patches of mould forming on the backs of wardrobes close to that wall before.
Keeping mindful of space, I was hoping to get away with battening out with 2x2s and infilling with 50mm PIR, then slapping 25mm over the top of it all to stop cold bridging from the studs.
When done, I want to put a couple of PAX wardrobes slammed right up against the wall (this is the only good wall to have a wardrobe in that room). Would be used for clothes and storage of various items I wouldn't want getting damaged due to poor conditions.
Looking at internet calculations, 75mm of PIR in this configuration would give me a rough U value of 0.3. What I'm mostly concerned about, though, is will this entirely solve the problem of that wardrobe getting too cold? Ultimately, I'm just not sure how much insulation is 'enough' to have the wardrobe on an exterior wall basically be equivalent to if I was putting it on any other wall where these issues would never be a problem.
Have an exterior wall (cavity behind it is ventilated with outside air as in roof space), west facing. The old wall is just your standard lime plaster on wood laths that are basically strapped straight to the stone. Want to tear it all down and insulate, as I have had issues with small patches of mould forming on the backs of wardrobes close to that wall before.
Keeping mindful of space, I was hoping to get away with battening out with 2x2s and infilling with 50mm PIR, then slapping 25mm over the top of it all to stop cold bridging from the studs.
When done, I want to put a couple of PAX wardrobes slammed right up against the wall (this is the only good wall to have a wardrobe in that room). Would be used for clothes and storage of various items I wouldn't want getting damaged due to poor conditions.
Looking at internet calculations, 75mm of PIR in this configuration would give me a rough U value of 0.3. What I'm mostly concerned about, though, is will this entirely solve the problem of that wardrobe getting too cold? Ultimately, I'm just not sure how much insulation is 'enough' to have the wardrobe on an exterior wall basically be equivalent to if I was putting it on any other wall where these issues would never be a problem.