With the roof insulation from the inside option, every requirement for an old building’s roof can be satisfied. With the PAVATEX internal roof renovation system, you can easily improve your roof to a level that corresponds to currently-required standards for new construction.
For combined insulation between and below rafters using PAVAFLEX and PAVATHERM-PROFIL, attention must basically be paid to the following:
If insulation already exists between the rafters and is intact, it can stay in place. Otherwise, the space between the rafters is completely insulated with void-free PAVAFLEX.
In addition, a substructure can be installed at right angles to the axis of the rafters with flexible PAVAFLEX woodfibre insulation material between them.
Depending on the construction layout, an additional vapour control membrane such as PAVATEX DB 28 should be installed on the underside of the rafters or new substructure.
Next, PAVATHERM-PROFIL insulation boards are mounted on the substructure and fixed appropriately. A permeable red chalk or clay-based mineral plaster forms the internal closure.