Fungus On Roof Timbers

The first one we will talk about is algae.

Fungus on roof timbers.

This occurs when the temperature of the sheathing drops below the dew point creating a thin layer of moisture on the substrate. This fungus is particularly damaging to the roof itself when not taken care of as soon as it s noticed. Algae will devour your shingles and is also attracted to moisture. White mold commonly looks like bright fluff like spots that spread on numbers of surfaces from plants to wood and even bread.

A fungus is described according to the colour of the damaged timber white primarily found in hardwood or brown favouring softwood. In the vast majority of cases the mold growth is caused by condensation. There are four common types of roof fungus that cause the most problems whether it be damage to your home or your health. Dry rot fungus is often thought of as a building cancer rampaging through buildings and rapidly destroying any timber in its path.

Alternatively it may be classified as either dry rot a brown rot caused by one fungus serpula lacrymans or wet rot white or brown rots caused by various fungi commonly coniophora puteana. Mold growth on attic roof sheathing is a common issue in cool climates such as the pacific northwest. Generally water leaks and poor ventilation leading to condensation are the main roof defects which give rise to a variety of fungi moulds and insect attacks. Re roofing with lining lining papers sarking roofing felt can cause severe mold growth and rot due to reduced ventilation.

Excessive ceiling insulation pushed down into the roof edges can also cause condensation and mold growth because it frequently blocks off the eaves or soffit ventilation.