The insulation of the attic of a house benefits the whole house and contributes to improving its comfort as well as its energy performance. When an attic has a solid floor, it is always advantageous to isolate the sections of under-roof rather than the floor of the attic, a simplicity solution that nevertheless condemns any use of this volume, even for storage.
This is obviously an obligation when considering installing living rooms. It then becomes essential to isolate also the gable walls and the wall portions supporting the sandpit purlins, in other words the sub-roof sections themselves. The technique of implementation of semi-rigid glass wool on frame, with dressing of plasterboard is the best solution.
Warning: do not start this kind of pose unless you feel the skills. If not, call a professional installer.
(photos / visuals: © Isover, except special mention)
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