First question: I have builders doing some work in a room at first floor (under the loft) and, while they were taking down old plasterboard, it became apparent that the ceiling had previously been over-boarded. The top layer of plasterboard had clear and extensive water damage but the added layer is perfectly fine. In the loft I cannot see any sign of water damage on the rafters and joists (but it has also not rained lately). I got a bit suspicious so I've had a good look from the outside and I've realized that a bit of the roof actually looks like it is sagging (red area in picture attached). Should I be concerned about this or is it likely an historical problem and not really concerning?
Second question. The builder has removed the vent pipe so now there is just the remaining ventilation slate (see picture attached). The builder is planning to just cap it with something to prevent water the water from getting in. I am wondering, without the soil vent pipe inside, will this arrangement be stable or will it be moving a potentially be displaced in case of strong winds?
Second question. The builder has removed the vent pipe so now there is just the remaining ventilation slate (see picture attached). The builder is planning to just cap it with something to prevent water the water from getting in. I am wondering, without the soil vent pipe inside, will this arrangement be stable or will it be moving a potentially be displaced in case of strong winds?