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