When doing any kind of maintenance, make sure that you avoid walking on the slate roof as much as possible. Thin slate may break or crack due to the surface weight, causing extra damage to the property.
Most of the maintenance is performed by the regularly assess your roof. First look for broken or cracked areas. If you see any, contact a specialist immediately.
Cracks or breaks in the roof can allow water to leak under the roof and result in water damage occurring. You can also contact Slate Roofing Companies in Sydney & Slate Roofers & Roofing Contractors online.
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A roof repair specialists can repair the damaged areas quickly and much more affordable compared to what it would cost to fix extensive water damage.
Next thing you need to check regularly or keep an eye on the irregular around your roof. You'll surely need to replace the flashing sooner than you'll have to do any major repairs on your roof.
If replacing your flashing requires replacement the sheathing under the slate, make sure you get advice from the professionals. Not all sheathing materials are created equally and thus you need to know all detailed specifications.
Checking the quality:
You just need to look at your roof from the exterior. You should also check it from the loft so you can see the interior of your roof.
Use a flashlight so that you can check for stains on the timbers of your roof, especially if it's just rained. If your tiles have water stains, then you'll need to do a deeper check for hairline checks.
There are also lots of things you can see from the ground. Look for sloped slate tiles. If tiles have a powdery appearance, then it means the tile is failing and needs to be replaced in order to restore the normal look.