The presence of moss, lichen or plant debris on a roof is not just a matter of appearance: these elements hold moisture against the covering and between the shingles, creating a permanently damp environment where the surface should dry quickly.
Common causes
shaded or north-facing areas that dry slowly, trees overhanging the roof, debris (leaves, needles) that accumulates in the valleys and holds water, a humid climate, and infrequent maintenance. Moss settles first where water stagnates.
Signs to watch for
green or black patches on the shingles, moss lodged between the rows, embedded lichen, debris built up in valleys and gutters, constantly damp or dark areas on the north side.
Why you should not ignore it
the moisture held by the vegetation accelerates the deterioration of the shingles and flashings, can lift the rows as it settles underneath, and eventually promotes infiltration. What looks like a simple cosmetic issue actually acts as a factor of premature wear on the roof covering.
What a professional assessment reveals
Moss and vegetation hold moisture against the roof and accelerate its deterioration. An assessment gauges the real impact on the covering and the conditions (shade, drainage) that encourage their return, a useful observation from a pre-purchase inspection.
Accumulating vegetation blocks drainage and holds water. Our roof inspection checks drains and slopes, as well as the condition of the flashings.
Vous soupconnez ce probleme dans un batiment ?
Une inspection le confirme, le documente et le chiffre, pour decider en connaissance de cause.
Inspection preachat Bilan de sante du batiment (BCA) Demander une soumission
