Honestly, clean sand is often preferable to heavy clay from a foundation perspective. The main issue is usually trench stability and collapses during excavation rather than the actual bearing capacity.
If the existing bungalow has been sitting on strip foundations for 70 years without...
Personally I wouldn’t automatically scrap it.
I work in the metal garage industry and a properly reinforced steel structure can last decades if condensation and insulation are done correctly. The main issue with older garages is usually ventilation and moisture rather than the steel itself.
If...