Technical resolutions for the most frequent structural and planning obstacles encountered during major residential remodeling.
Review the joist orientation above the wall in question. If joists run perpendicularly across the top plate, or overlap directly above the wall, it is load-bearing. Exterior walls are universally load-bearing. However, multi-directional roof trusses can sometimes transfer loads to seemingly parallel interior partitions—always consult an engineer.
Yes, but it requires doweling. Rebar must be epoxied into drilled holes in the existing concrete face to tie the new pour to the old structure. Additionally, an expansion joint material or waterproofing membrane is often required at the cold joint to prevent water ingress due to differential settling.
Span length and height restriction. Timber beams deeper than 16 inches intrude heavily into head-space. A W8x31 steel beam (only 8 inches deep) can span distances that would require massive, obtrusive timber assemblies. If flush-mounting inside an existing ceiling joist cavity, steel is often mandatory.
When executed via the staggered pin method under strict engineering supervision, yes. It involves excavating and pouring new footings under the existing foundation in alternating small sections (pins) to lower the floor level without compromising the structure above.
If you are adding square footage, a dedicated HVAC zone, or heavy appliances (induction ranges, steam showers), a 200-amp service minimum is required. Code often mandates updating the grounding system during major renovations, triggering a panel replacement regardless.