dbyter

We have planning permission for a new build and this shows the drainage design for the house. We've unearthed the pre-existing sewer connection (red dotted line) which served the demolished house and it is located in the area circled red. Thinking that the current design looks pretty sensible and we can change direction and follow the red line, putting in a long radius bend towards an i.c at the circled point roughly in that circle area where we connect to the existing pipework? I'm asking incase anyone with knowledge thinks that changing the route and instead running it under the slab more directly is any sense. From reading comments in other posts it seems the general consensus is to run drainage outside of the foundation wherever possible? The waste pipe running the depth of the building shown at the wall of the bedroom is there because of an upstairs bathroom above the plant room next to the bedroom, architect didnt think it could work running through 1st floor joists given warm roof with exposed joists on the lean to section. He said a long swept bend coming down through plant room and into slab with rodding eve at front of property might work well for this? He has suggested the SVPs in roof vent tiles. Given there is that pipe running the depth of the building, and no obvious way round that I guess I'm wondering if the whole lot could just come from back to front under the slab and then across the garden from roughly that rodding eye outside the bedroom location. Thanks for entertaining queries from an enthusiastic DIYer, in way above his head!

@JohnMo Thanks also. I think they must comply as they are on a few roofs up here.

@Gus Potter Thanks for taking the time to do put your thoughts down. I will raise these with the architect. Point also taken re slate hooks. Lots to learn!

We are going for integrated solar and slate hook fixings-maybe we could lose the battens and counter battens?

Thnaks for input. I did ask about roof venting and my architect told me that because its natural slate on sarking boards - nailed with gaps betwen boards for movement - there would be enough airflow through the sarking boards and the small undulations which occur with natural slate. Hoping this to be the case. Good point re vcl between 1st floor joists. We are going for factory injected PIR panels for walls but will ask him re pros/cons of mineral wool for between rafters. Thanks.

Hi, new to the forum and this is my first post. Looks like there is a wealth of information here and in time I hope to be able to contribute something useful back once we are further on with our new build in Shetland. Our architect has just come with the preliminary drawings in preperation for the build warrant submission and I'm wondering if the VCL is in the best place within the makeup for fitting and achieving good airtightness? Thoughts or input on other aspects of the detailing welcomed. Thanks, David.