I was wondering if I could pester you good people for some advice. My house (1932 semi in Essex) has, in every room, vents built into the walls. These look a little like airbricks from the outside but are high up in the walls. On the inside they are a metal grid buried into the plaster. Obviously they provide ventilation but they also increase my heating costs and modern houses (and older ones) don't seem to need them.
Would there be any negative impact if I were to fill them with expanding foam, ie block them up? I guess the degree of ventilation would decrease but I find that desirable. There's enough of a draft through my ancient doors and windows anyway! Is there anything I'm missing? Will blocking them up increase dampness somehow (there's no damp problem at the moment)?
Would there be any negative impact if I were to fill them with expanding foam, ie block them up? I guess the degree of ventilation would decrease but I find that desirable. There's enough of a draft through my ancient doors and windows anyway! Is there anything I'm missing? Will blocking them up increase dampness somehow (there's no damp problem at the moment)?