Slate Roof Weight Psf

Slate roofs national slate association 1926.

Slate roof weight psf.

Roofing slate created by nature over 500 million years ago has been used as a roof covering for more than a thousand years. For 1 2 slate the figure is around 7 3 lbs per sq ft and is approximately 11 lbs per sq ft for 3 4. 500 x 250mm slate 4 5mm thick 1 889 kg x 18 8 at 75mm lap 35 51kg per square metre. Slate roofing 3 16 inch slates.

How much a slate roof should cost. Installing a natural slate roof starts around 9 10 or more a square foot for a basic roof up to 30 40 or more a square foot depending on the type of slate used the installation pattern some methods use more slate per square foot the design of the. Slate roofs national slate association 1926. Back in 1926 the commercial standard slate thickness was 3 16.

Average costs and comments from costhelper s team of professional journalists and community of users. Slate roofing 1 4 inch slates. 3 5 4 5 pounds per square foot clay or concrete tile. How much does slate weigh.

On a roof with a slope greater than 4 to 12 the live load limit is typically adjusted downward from 20 psf to 15 psf to allow for the relatively greater dead load on the steeper roof. Roofing asphalt shingles 2 5psf wood shakes 3 0psf roll roofing 1 0psf asphalt shingles approx 1 4 2 0psf cement asbestos shingles 3 8 4 0psf clay tile add 10psf for mortar 9 0psf ludowici 10 0psf roman 12 0psf slate 1 4 10 0psf spanish 19 0psf wood 1 3 0psf cement tile add 6psf for mortar 10 0psf. 5 5 10 pounds per square foot. Slate roofs national slate association 1926.

The weight of truss rafter must be added to calculate the dead load of the roof. One of the drawbacks of slate for some homeowners is the heavy weight of slate roofing tiles which can be between 800 1 500 pounds per square 100 square feet. Slate roofing 3 8 inch slates. If the slate tiles are 3 8 thick they will weigh around 5 5 lbs per sq ft.

1 lb m ft 2 4 88 kg m 2. Consequently not all homes have the structural support necessary to take the weight of a slate roof and often additional reinforcement needs to be installed. 3 5 5 pounds per square foot wood shingles shakes. Steel standing seam will weigh about 85 120 pounds per 100 square feet of roof area.

That s a great question especially when you are comparing it against other roofing products.