Thanks Alastair - that's what I thought, logically. But just wondered about the risk/possibility of the existing solid wall getting saturated and dripping into the new extension and if building control would query. But I guess with a solid wall, it just is what it is....
Hi,
Has anybody ever had to do a pitched roof abutment to a solid wall with a rendered finish? obviously you can't use a cavity tray to a solid wall, so do you tend to do anything else additional to the lead flashing? i.e .do you try to cut a DPC into the wall as deeply as possible?
Thanks