When checking my contractors work I usually go by a simple rule, “If it looks like poor workmanship, then it probably is.”
The majority of my extension involves a suspended timber floor. When the contractor got up to DPC I noticed the lack of air bricks. When I brought this up I was told they were to be notched in later and cavity trays will be installed as they move up.
The contractor is halfway up to GF wall plate and he has started to notch in the air bricks. Outside looks fine, with cavity trays and weep vents. Internally, to me anyway, it looks a complete mess. I also feel the internal load bearing skin has now been compromised (when compared to a non notched wall).
what do you guys think? I feel like I need to now insist on small 65x100 lintels. Only two pictures but there are 6 openings, all of the same quality internally.