At 99manos.es, we are seeing the same issue with spray polyurethane insulation: a price per square metre only becomes useful when two quotes describe the same job. Thickness, surface preparation, access, application conditions and included finishing work can all change the real cost.
For a services marketplace, the product lesson is that quote comparison starts with scope normalization. AI-assisted task creation can help users specify the relevant technical details before professionals respond, making proposals easier to compare and reducing ambiguity on both sides. Here is the full guide for Spain: