Before applying the cleaner spray the roof with water to cool it down.
Slate roof discoloration.
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.
This slate roofing photo series shows all kinds of roofing slate defects.
White stains on slate roofs efflorescence or salt stains from rain water sometimes appear on slate shingles.
If your slate is looking a little worse for wear do not be alarmed.
Also slate is slippery when wet.
Pour it into a pump sprayer strap yourself into a full body harness tie it down and climb to the roof.
Regular roof cleaning is critical for your roof as slate is easy to cleave and water absorbent.
Slate roof defect photo library.
Take a flashlight and check for water stains on the roof timbers especially after a long period of rain.
You can also do a fair amount of checking at ground level.
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.
Moss often grows in the shade of trees too.
That ll prevent the cleaner from drying out too quickly.
But there are other roof stain colors and causes.
Trees plant debris stains stain patches under trees or nearby may be due to seeds berries leaves and other debris falling and decaying.
You can t walk on a slate roof no matter how shallow its pitch.
Historic slate roofs should be repaired rather than replaced whenever possible.
When cleaning a slate roof don t use chemicals like ammonia or chlorine bleach.
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.
Then spray the cleaner onto the shingles photo 1.
Buildup of moss and debris on slate roofs hold moisture in the slates that can split them during winter.
You can spot a sloped slate roof tile more easily from the ground.
Often the damage is hidden under overlapping slate courses and becomes apparent only when the roof starts to leak.
