Psi Rating For Flat Roof

Roofs are under a lot of pressure.

Psi rating for flat roof.

Our approach is to offer cost effective and timely solutions to all our customers roofing issues while placing an emphasis on quality. Hi all i m a bit confused by the choices of different types of eps and xps foam where the variable is psi rating. Flat roofs can require more maintenance than other roof types. This downward imposed load on the home is also known as the snow load.

General maintenance step 1 remove any standing water from the top of the flat roof. Regularly coating a flat roof can extend its lifespan. The standard guide in the u s the asce 7 05 lists weights and stresses for all building materials expressed in pounds per square foot. What psi rating is adequate for say a 250 lb worker walking or standing.

If we want foam on the roof i assume that it needs to withstand workers or myself occasionally walking on the roof. Failure is defined as the point where the roof deck. Most notably flat roofs have the tendency to collect water from rain which can lead to potential issues such as the buildup of unsightly algae and stains. The north zone middle zone and the south zone are identified on the roof load zone map above.

Our customer service has developed numerous long term clients since 1994. Load limits on the roof of a building. Calculating the load on a flat roof is a challenging task for the layperson that involves knowledge of building materials their weights and local building codes. Psi roofing is committed to delivering the right roof for your specific need.

Roof load live load design is affected by the shape of the roof whether it is flat curved or pitched. Their low angle means a higher potential for ponding cracks and leaks. See information on the stc and ptc ratings here. In order to stay intact and in place a roof must be able to resist loads both permanent and temporary that are pushing.

The class a brand weighs 2 000 grams class b 500 grams and class c 9 1 4 grams. The psi rating is not something in use at the moment. An aluminum coating for a flat roof is a popular choice and can be applied without professional help. The brands consist of an ignited wood lattice placed directly on top of the test specimen.

Both are burn through tests and the ultimate roof systems rating is the lowest of the three tests.