Although Spain is a (theoretically) hot country there are building requirements for insulation for energy conservation.
The inside of the walls were all sprayed with expanding polyurethane foam insulation to a depth of 5cm. I also took advantage of the space to run corrugated tube trunking all around for the electrics. The inside walls were then built against the insulation and building foam injected into the spaces to bond and infill the space between the foam and interior walls.
Next was the under floor heating tubes and manifold. Each room has its own circuit and valve.
The floor panels are 40mm deep and have 5cm of cement with a plasticizer on top, then floor tiles to finish it off.
There are 2 parts to the roof so that it matches in with the existing roof. Part is pitched and part flat. On the pitched part there is 7cm of insulation and on the flat part 9cm of insulation.
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