If the slate is an older installation clean it with a heavy duty.
Sealing slated roof.
Use clean warm water without detergent as some can react with the sealer.
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Roofers choice 4 75 gal.
Make sure that the slate is perfectly clean and dry before applying the sealant or this will cause streaks.
The best way to stick a roof slate in place is to use a tried and tested solvent free and safe adhesive sealant that sticks and seals at the same time in a permanent capacity.
The slate must be clean before applying the sealer or you will seal any dirt and marks on to the slate.
Prep the slate for sealing.
Clean the slate thoroughly and allow it to dry completely.
Plastic roof sealant cement model rc015470 34 97 34 97.
Traditionally slates were nailed at intervals to the roofing laths with the horizontal overlap providing both weight and pressure on the row below to keep it firmly in.
Remove all grout and mortar residue.
Because of the porosity and finish of clay tiles coloured roof coatings are not advisable.