If you’re a contractor, and I’m referring to any type of contractor...
electrical, plumbing, roofing, general, concrete, paving,
landscaping, painting, drywall, hvac, plaster, flooring, siding,
insulation, windows, tiling, siding, framing, excavation,
soundproofing, drainage, waterproofing, etc.
then you’re going to want to keep reading.