Brief history:
1970s house originally with understairs, external access store (coal store some would say). This was then blocked up and opened up internally for under-stairs toilet.
No gas originally, but 20 years ago central heating fitted. Gas meter is on side of house in one of those white...
we currently have a porch which has 1 wall single skin brick and the other two walls are uPVC, including the door. Internally we still have the old wood framed main door. It has a flat felt roof. Floor area of existing must be around 2.5m2
Due to the single skin wall, the leaking roof and the...