June 13, 20224 yr Morning all, Thinking about airtightness/sealing up of the gable blockwall in my loft space, and similarly the bits of block wall at the ends of my voids in the dormer, I'm not expecting the plasterer to get into these spots. Would it be acceptable to paint the walls in one of the sealing paints, soudatight or similar, the loft space has been insulated between and below the rafters so walls are in an insulated room.
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