Insulated reinforced concrete roof decks are considered the most tornado resistant decks available due to their extreme strength.
Roof sheathing for torandao proof.
Use roof sheathing with a minimum thickness of 19 32 inches for added strength in high risk high wind zones.
Many tornado prone areas are also prone to hail.
Metal many roofers will tell you that metal is the gold standard for tornado resistant roofing.
There is a vast array of metal roofing options like stone coated steel shingles or metal panels which are installed in an interlocking pattern.
The sheathing works with the roof framing to transfer lateral loads to the home s shear walls.
For shingles wind ratings are based on standards published by astm international formerly known as the american society for testing and materials and resistance to impact is based on an.
Thicker sheathing can also offset sensitivity to overdriving.
A tornado resistant roof s primary function in a continuous load path is as a horizontal diaphragm that moves the loads imposed by heavy winds to the supporting walls below.
To protect roof coverings from both wind and hail damage look for wind and impact rated roof coverings.
Do not attach with staples.
Use a nailing pattern of 8d ring shank nails at 6 inches on center.
The roof sheathing is the first structural element in the load path between the roof system and the foundation.
If your roof decking also called roof sheathing is not structurally sound your roof materials.
Unfortunately concrete decks can only be installed on homes that have concrete walls due to the heavy weight of this decking type.