If I drill an hole through my external cavity wall, to run a cable
(telephone, TV aerial etc) - how should I seal it round the cable at
each side of the wall? Are there grommets I can purchase or should I
use silicon sealant or...........?
Ideally make the hole go slightly downward towards the outer wall and when
you feed the cable into the hole from the outside make a small loop
downwards to ensure that if there is any water ingress that gravity takes it
away from the inner wall and the cable does not act as a drip collection
Also use silicon sealant around the cable as it enters the outer wall. No
need for it to be silicon sealed from the inner wall.
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