Bleach or sodium hydroxide lye which can destroy all perimeter vegetation burn your skin and eyes and potentially degrade your asphalt shingle performance.
Slate roof cleaning chemicals.
Regular cleaning is an important part of keeping a slate roof in working order.
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.
Roof cleaning by using the correct chemicals.
When cleaning a slate roof don t use chemicals like ammonia or chlorine bleach.
Regular roof cleaning is critical for your roof as slate is easy to cleave and water absorbent.
Debris and moss buildup hold moisture in the slates that can split them during winter freezes.
A normal 9 trowel is suitable if your roofing contractor chooses a dry day any moss will flake off the roof much easier and there won t be any scratch marks on the tiles.
Unlike other roof cleaning products spray forget does not contain any bleach.
The goal when cleaning a slate roof is to soften and loosen the undesirable buildup.
This gives your roof an ugly look and it is bad for the state of the roof as well.
Buildup of moss and debris on slate roofs hold moisture in the slates that can split them during winter.
Small amounts of dirt are usually not a problem as opposed to when large parts of the roof are covered with moss.
Such harsh chemicals are incompatible with the copper.
It is a proven chemical that is non corrosive and biodegradable.