Should a cavity tray have been fitted above the drainage access but below the damp proof course?
My concern is that the cavity wall hasn’t been filled below the DCP throughout the walls? Is this conceivable?
I’m looking for a little advice re; the construction of mine and my neighbours terrace of houses. In the last year or so we’ve started to suspect that rats have accessed our cavity walls and are moving between the properties.
We have each noticed burrow holes coming out from close to the...