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We've got a couple of places where we're having built in wardrobes. In one area the house design is such that the depth of the alcove which will contain the wardrobe is only 570mm which after doors is likely to reduce down to 540-550mm of internal depth. This is slightly smaller than the recommended 600mm depth for a wardrobe (Having said that we have a couple of free standing wardrobes that only have an internal depth of 550mm and a coat-hanger is 400mm wide, so perhaps not a huge issue?). Anyway it got my mind thinking about the 38mm service cavity in the back wall of this alcove. At the moment I don't envisage any services at this point so this is feeling like wasted space which I could recover for the wardrobe. However, does it also act as a ventilation gap (MBC Timber Frame) or provide other benefits (such as aiding airtightness of the frame)? The last line also leads to a further question. "If you place a screw into an airtight board do you compromise its airtightness?". I accept it might to an extent but surely its by a tiny level? Or even nil if a squirt of silicone was applied to the screw thread? Typical wall build up for info:
