Level 4 Roof

Older class 4 roof systems can sustain damage from 2 1 2 stones.

Level 4 roof.

For example if the level is 4 above the roof at a point 12 away from where the level is touching the surface then the pitch is 4 12. One roof has the same smog fighting potential as 2 or more trees assuming standard roof of 30 squares catch up more with smog reducing granules and other malarkey roofing news. Single story house plans sometimes referred to as one story house plans are perfect for homeowners who wish to age in place. On the roof hold the level perfectly level and measure the height from the roof to the level 12 inches away from where the level touches the surface this will be the rise.

A class 4 roof covering receives the highest premium credit. With class 4 shingles there are no splits or tears. These impact resistant beautiful shingles have been specially engineered to face some of the worst storms and extreme weather and still look their best. Lawrence berkeley national laboratory and 3m.

People often talk about class 4 roofing shingles and wind resistance together because high winds may cause debris to go airborne impacting roofs and causing damage. However a story refers to a level that resides above ground. In a class 4 ul 2218 impact resistance test a 2 inch steel ball is dropped from 20 feet to see if the shingles will fracture. As a result it no longer has the ability to transfer impact energy and the mat is damaged and or punctures occur to this system.

A single story house plan can be a one level house plan but not always. Class 4 roofing shingles do not necessarily feature a higher wind resistance. The main level basement and upper level. The list of approved laboratories is shown below.

Wind ratings are a separate classification. With a regular shingle most of our competitors impact resistant shingles are only class 3 cracks and ruptures will appear from that kind of impact.