Slate Sorting and Storage
All natural slates should be sorted and graded in accordance with BS 8000. This is most easily done at ground level. Any twisted or bowed slates should be set to one side, and be used first for eaves or top slates. This will result in the best possible roof finish. Not sorting slates, particularly amongst the Commercial and Classic ranges, can compromise the aesthetic appeal of the roof.
Slates should be stored in their pallets wherever possible. Once removed from the crate, they should be stacked on their long edge on two pieces of batten. Each slate should be inspected and separated into three piles;
- Thick slates should, ideally, be used at the lower roof
- Medium thickness slates used in the middle of the roof
- Thin slates should be used on the upper roof