The old slate should be removed to prevent overloading of the roof timbers.
Old slate roof installation.
Roof pitch the angle of a roof not only determines what slates to use but the amount of overlap that the slate roof needs to remain waterproof.
Your price will be on the lower end if you use recycled slates or reinstall your own.
To estimate costs for your project.
For a basic project in zip code 47474 with 120 square feet the cost to install a slate roof starts at 12 54 17 17 per square foot.
4 have the correct tools.
A slate roof can cost from 12 to 40 per square foot according to websites and roofers i consulted.
Actual costs will depend on job size conditions and options.
Assume all elements of the roof assembly must last and function for at least 150 years.
If repair is not possible and a new slate roof must be installed it is important to remember that more than just the replacement of the slate is involved.
3 before you start do your homework.
Read about the common mistakes people make when installing.