Can you walk on slate roof?

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Tags

1. #possible
2. #instead
3. #scaffolding
4. #stone
5. #building
6. #while
7. #damage
8. #beginning
9. #effective
10. #delicacy
11. #slate
12. #before
13. #nearly
14. #roofs
15. #erect
16. #still
17. #requires
18. #century
19. #repairs
20. #working
21. #ladders
22. #installers
23. #never
24. #experienced