Roofing quotes expose a scope-normalization problem for marketplaces

Panel-sandwich roofing shows why a marketplace should not compare €/m² without a scope model. In our latest 99manos guide, material-only prices often appear at €35–50/m², while installation on a sound existing structure is €60–95/m². Adding the supporting structure can move the range to €105–195/m².

The product lesson is simple: intake should separate panel supply, installation, trims, supporting structure, roof-slope area and cut waste. The profile is cut in 350 mm modules, and the billable surface is the sloped roof—not the horizontal footprint. Capturing these fields before professionals quote makes price differences explainable and proposals genuinely comparable.

https://99manos.es/blog/panel-sandwich-teja-precio-m2-instalado