Roof coverings that have passed the ul standard 2218 test are classified as either class 1 2 3 or 4.
Level 3 4 roofing.
However due to the various benefits of class 4 impact resistant shingles the extra cost upfront may be a worthwhile investment if you live in an area where hail and wind storms frequently occur.
They re slightly thicker and made to resemble more expensive wood shakes.
Approved laboratory roof class location.
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The list of approved laboratories is shown below.
4 3 8 black epoxy 51605 pkg.
Class 4 roof covering is the most impact resistant roof and receives the highest premium discount.
Summarizing the result we would be looking at for a class 3 roof is earned if the sample does not crack when hit twice in the same spot by a 1 75 inch diameter steel ball.
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As you contact various contractors or suppliers you should ask about roofing materials that meet ul standard 2218.
Available in a diverse selection.
A class 4 rating the material should not get damaged when hit twice in the same spot by 2 inch diameter steel ball.
A fiberglass mat has proven to be a more sustainable effective product.
Low profile head reduces damage to installation and single ply membrane when attaching to steel or timber.
Standard entry level 3 tab shingles are the cheapest and thinnest.
Class 1 would be the lowest tested rating.
Ul class 1 2 3 and 4 tx only ul and fm class 3 and 4 all other states.
Roof coverings that have passed the ul standard 2218 test are classified by ul as either class 1 2 3 or 4.
This steel ball must hit the field area of the shingle two times and the edge of the shingles two times without damaging the mat to qualify for a particular class rating.
Architectural shingles are a step up from 3 tab shingles.