|Attic Completion Work - Course: Timberwork Techniques. Trainees' Handbook of Lessons|
|3. Building-in of Roof Superstructures|
If the rooms in the attic are to be used for housing purposes, the visible roof rafters are to be covered, too. For this purpose, the same material should be used as for the partition wall.
Whether or not additional rafters are to be applied to the roof rafters, depends on the material used and on the working/processing instructions for such material.
In the event of wood covering, the covering can be directly nailed to the roof rafters with hidden nails or be screwed with visible screws.
In any case, the cavity between the roofing and wall covering is to be sound-insulated using the same material. The covering should be connected with the timbering in the same way as for the partition walls.
Before mounting the sound-insulating material, the area of the eaves angle and rafter foot should be particularly checked for access by animals.
But the necessary ventilation for the roof structure is to be ensured to avoid infestation of wood with animal pests which would destroy the roof structure over the years.
When joining the roof superstructure, the necessary covering of the timberwork should already be taken into account to avoid necessary or additional timbers to be included at a later stage.
The same material as used for the wall covering should be used for covering the rafters. When mounting the sound-insulating mats, sound bridges should be avoided by any means.