If the exposure is ten inches the slates should be twenty three inches.
Fixing loose roof slates.
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Slide the slate.
Carefully raise the slates in the row.
With slate roofs look for similar numbers of loose slates that have been refixed with small metal tingles.
How to replace damaged or lost roofing slates using the copper tab method cut the concealed nails holding the damaged slate in place.
There are usually two nails.
You ll need to replace the broken slate.
From a thin 25mm 1 inch wide strip of lead or copper make a tingle to hold the replacement slate in place.
If the tile or paver is already cracked or chipped it may be easier to break it up and remove it in smaller pieces.
When removing slates from old roofs quite often the slating lath or batten has become dry and brittle over time this makes it very easy to break when using a slate ripper to pull a slate out or chop the nails fixing the slates.
Sometimes you may find the slate is not damaged and has simply slid out of place probably caused by corrosion on the securing nail the tricky thing is due to the way slates are laid on a roof.
How to replace missing slate on roof.
If 10 or more tiles per slope are damaged or missing the roof is likely to be nearing the end of its useful life and will need stripping and re covering.
Acquire the properly sized replacement slate.
Make a hole in one end of the tingle to take a fixing nail and secure the tingle through the gap between the two slates.
In the loft there may be damp smells and localised staining from water ingress.