Stone walls behave differently
Granite is nothing like a modern cavity wall: high thermal mass, high water absorption, low thermal resistance. We calculate what each solution actually delivers rather than applying a standard insulation thickness.
Brittany
Energy audits and DPE in Brittany
In Brittany, granite walls, longères and maritime exposure shape any renovation strategy. Damp and wind usually matter more than cold alone.
Wind, driving rain and airtightness
On the coast, driving rain and gusts increase losses through air leakage. Sealing the building can outperform another centimetre of insulation.
Heating and heat pumps
Brittany's mild winters suit heat pumps well, provided the emitters accept a low flow temperature. That is the point we verify before recommending anything.
Frequently asked questions
Is a heat pump suitable for a stone longère?
Often yes, but only after checking heat loss and emitters. A sizing study prevents an installation that runs permanently at high temperature.