Homeowners and builders uncertain about optimal slab foundation insulation placement, leading to costly mistakes and energy inefficiency

DIY homeowners and contractors struggle to determine whether slab foundations should be insulated underneath or at the perimeter edges, lacking clear guidance on best practices. This uncertainty results in either inadequate insulation decisions that waste energy and increase heating/cooling costs, or expensive rework after discovering the wrong approach was used. Current solutions fail because technical guidance is fragmented across forums and lacks consensus on regional/climate-specific recommendations.