Slate Roof Installation Questions
We supply slate rather than install it, but we have spent thirty years around the crews who do. These are the questions contractors and homeowners ask most before a slate roof goes on.
How do I figure out how many squares I need?
To accurately determine the number of squares needed, you'll first measure the total surface area of your roof in square feet. Then, divide that total by 100. It's always advisable to add a percentage for waste, especially with natural materials like slate, to ensure you have enough for cuts and potential breakage. For precise calculations, we recommend consulting with a qualified roofing professional.
What is the minimum roof pitch needed for slate roofing?
For the best performance and water shedding, slate roofing should be installed on roofs with a minimum pitch of 4:12 (4 inches of rise over 12 inches of run). Some product lines may allow for lower pitches. We recommend consulting our detailed installation guides for specific product recommendations.
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What is headlap and why is it important?
Headlap refers to the shortest distance between the butt (bottom edge) of a slate tile and the top edge of the slate in the course two courses immediately below it. It's crucial for ensuring a watertight roof, as it dictates how much overlap each slate has with the ones beneath it, preventing water from penetrating the roof deck. Proper headlap is essential for the long-term performance and integrity of a slate roof.​
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What roof decking is required for the application of slate?
For the application of slate roofing, a robust and rigid roof decking is essential to provide adequate support for the weight of the slate. Typically, this involves solid sheathing such as plywood or tongue-and-groove boards, ensuring a smooth and continuous surface for proper installation. The specific decking requirements may vary based on local building codes and the selected slate system.​​
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How do you cut slate?
Slate is typically cut using specialized tools like a slate hammer and slate cutter, requiring specific techniques. Professional installation by experienced slate roofers is highly recommended to ensure proper cutting, fitting, and overall integrity of your roof.​​
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How do you repair a slate roof?
Should a slate become damaged, it's crucial that replacement be performed by a qualified slate roofer. Proper repair techniques ensure the integrity and longevity of your California Slate roof.
Can slate be used for siding?
Yes, slate can be used for siding and other architectural applications, offering the same beauty and durability as a roofing material. California Slate Company can provide specific product recommendations and guidance for slate siding projects.
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