In garrets the attention should paid to leaky roof covering
materials, hung ceilings, sheets, ridges, loose roof tiles, leaky installation
bushings and diffs etcetera.
Water trickling from leakage and drift snow, small as well as large,
can result in fungus affections in wood and may trickle down to underlying
living areas causing more damages. Insufficient or the lack of ventilation
can cause fungal affections.
Garret should be kept clean from construction materials, cobwebs and
general litter.
Penthouses in redeveloped garrets, you should not only monitor the humidity,
but also check for leaking roof covering, gutters and clogged up drain
pipes, damped masonry and others. Moisture penetrating the wall from
the outside can cause fungus affections and frost damages in the wall.