Stains On Slate Roof

Stains and wear indicators on slate roofing a photo guide.

Stains on slate roof. Staining on roofing slates. The white markings shown on these roofing slates is a mineral deposit left behind as water evaporates. Although slate is not a material commonly thought of as becoming stained it s not impervious to rust stains. Slate is a beautiful and popular medium for fireplaces and patios but it is highly susceptible to stains from water and hard calcified deposited stains under pots and other items.

Here is a diagnostic guide to types of stains and staining materials found on roof surfaces black red green brown or other coloured stains on asphalt roof shingles or on other roofing materials need first an accurate diagnosis of the stain cause and then proper steps to remove the stain or to prevent future staining on roof shingles surfaces. White efflorescence on roofing slates. Slate is a sedimentary rock with miniscule layers that easily cleave. This quality is what distinguishes slate as a suitable roofing material.

That warranty should contain a guarantee that if the slate develops pyrite stains ugly rust colored streaks the slate manufacturer will pay to replace your roof. Once turned into roofing material slate absorbs water and can naturally de laminate during the freeze and thaw cycles of winter. If your household water pressure isn t enough to generate the proper nozzle pressure at the jets the manufacturer recommends boosting it. If your slate is looking a little worse for wear do not be alarmed.