Slate Roof Stains

Stains and wear indicators on slate roofing a photo guide.

Slate roof stains.

This quality is what distinguishes slate as a suitable roofing material. White efflorescence on roofing slates. Take a flashlight and check for water stains on the roof timbers especially after a long period of rain. If your slate is looking a little worse for wear do not be alarmed.

Staining on roofing slates. You can spot a sloped slate roof tile more easily from the ground. Slate edges showing moisture absorption but generally good condition these slates have a good remaining life. 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.

The white markings shown on these roofing slates is a mineral deposit left behind as water evaporates. You can also do a fair amount of checking at ground level. If your household water pressure isn t enough to generate the proper nozzle pressure at the jets the manufacturer recommends boosting it. A slate roof can cost from 12 to 40 per square foot according to websites and roofers i consulted.

Once turned into roofing material slate absorbs water and can naturally de laminate during the freeze and thaw cycles of winter. 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.