Use spray foam to keep slate-roofed attics from heating up [Video]
If you love your beautiful slate roof but don't care for your unreasonably warm attic space, you may want to consider spray foam insulation. The material's application method makes it extremely versatile when it comes to installation.
Spray foam insulation can be installed directly beneath the roofline, eliminating the need to upset your stone roofing. A high insulating value allows spray foam insulation to prevent heat from transferring through the roof and into the attic. This insulation solution, as well as ventilation improvements, are sure to address your uncomfortable attic and help turn it into a space that you can potentially use.
Visit Icynene.com if you'd like to learn more about the how spray foam can help improve the performance of slate and other types of roofing.