Often the damage is hidden under overlapping slate courses and becomes apparent only when the roof starts to leak.
Slate roof discoloration.
That ll prevent the cleaner from drying out too quickly.
Pour it into a pump sprayer strap yourself into a full body harness tie it down and climb to the roof.
Moss often grows in the shade of trees too.
Before applying the cleaner spray the roof with water to cool it down.
The remedies for and means of preventing stains on roof shingles are discussed as well.
You can spot a sloped slate roof tile more easily from the ground.
Historic slate roofs should be repaired rather than replaced whenever possible.
If your slate is looking a little worse for wear do not be alarmed.
Here we give photographs of slate roof conditions including normal wear on slate roofs worn out slate roofs types of slate roof wear and damage and stains or discoloration on slate roofs.
Take a flashlight and check for water stains on the roof timbers especially after a long period of rain.
When cleaning a slate roof don t use chemicals like ammonia or chlorine bleach.
Also slate is slippery when wet.
You can t walk on a slate roof no matter how shallow its pitch.
Slate roof defect photo library.
Dark black or brown roof shingle stains are often caused by black algae bleed through or extractive bleeding of asphalt dirt soot or organic debris.
Regular roof cleaning is critical for your roof as slate is easy to cleave and water absorbent.
Then spray the cleaner onto the shingles photo 1.
Before replacing a slate roof check for isolated damage corroded and worn flashings leaky gutters poor ventilation in the attic and other possible sources of moisture.
If the tiles have water stains check for any hairline cracks.
This slate roofing photo series shows all kinds of roofing slate defects.
But there are other roof stain colors and causes.
White stains on slate roofs efflorescence or salt stains from rain water sometimes appear on slate shingles.
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.
Buildup of moss and debris on slate roofs hold moisture in the slates that can split them during winter.
