As a manufacturer of concrete roof tiles we would not advocate power washing or recoating tiles as this would invalidate any guarantee.
Power washing slate roof.
This homeowner attempted to clean his roof and you can see the granules that were removed due to his imprope.
One end has a sharp point for punching into the slate while the other has a claw for removing nails.
Such harsh chemicals are incompatible with the copper components of your slate roof.
This is because the water comes out too forcefully and can damage the material.
Buildup of moss and debris on slate roofs hold moisture in the slates that can split them during winter.
When cleaning a slate roof don t use chemicals like ammonia or chlorine bleach.
To avoid damaging your roof it s better to use an alternative cleaning method.
Debris and moss buildup hold moisture in the slates that can split them during winter freezes.
Regular roof cleaning is critical for your roof as slate is easy to cleave and water absorbent.
A proper slate hammer is one foot long and made out of a single piece of stainless steel.
Because of the possibility of an older and fragile slate roof no pressure should ever be used during cleaning.
While power washing is ideal for concrete surfaces slate tiles are too delicate to be blasted with a power washer.
Slide the flashing under the slate but over the nail head.
Power washing the tiles will remove fines in the concrete which will affect the lifespan of the tiles.
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As a manufacturer of concrete roof tiles we would not advocate power washing or recoating tiles as this would invalidate any guarantee.
Instead soft washing with a garden hose is least likely to chip dent or crack the tiles or panels.
Most contractors don t recommend pressure washing or power washing a roof.
When having the slate cleaned it should be only be done from a ladder or lift to avoid damage to the roof.
Unfortunately the simple answer to that is no.
You should never power wash a slate roof.
Regular cleaning is an important part of keeping a slate roof in working order.
Any form of weight can crack or break a slate tile so no homeowner or roof cleaning professional should ever walk on the roof.
Pressure washing your roof can damage your roof.
Any pressure greater than a garden hose pressure poses the risk of damaging the slate and or the sheathing underneath.
Step 3 replacing.
While you might be tempted to reach for a strong chemical or a pressure washer it s better to leave them behind and give your slate roof a little tender loving care.
