I live in a detached house with a garage joined to the property with a bedroom above the garage. Separating the garage (and the bedroom above) from the main house is an internal cavity wall of 350mm (including 100mm thermalite blocks either side). I plan on drilling a hole from the top of the internal garage wall into the cavity to pass some data cables through and up into the loft. I’m planning on covering up the holes once the cables are installed into the garage with fire rated foam. Is this the best way and should I be concerned with damp getting up into the loft with the hole made in the garage wall into the cavity?
I’m planning on drilling a 90mm hole into the 100mm thermalite blocks to get into the cavity.
I’m planning on drilling a 90mm hole into the 100mm thermalite blocks to get into the cavity.