Roof Brittle Test

The brittle shingle test is a super scientific testing method whereby an inquisitive person picks up a shingle tries to fold or bend the shingle up to a 90 degree angle and then checks to see if the shingle breaks or bends.

Roof brittle test.

The entire roof area is then wetted with water which creates an electrical plate at the entire top side of the membrane when charged by the test unit. If a homeowner has no concerns with heights in general climbing a ladder or walking on a roof there is a simple procedure that can be used to test for brittle shingles. It is clear that such a test could cause damage to any shingle regardless of its age condition. According to underwriters laboratories a brittle test or wind resistance test is conducted by lifting a tab 90 degrees and if during the test the shingle shows no permanent damage then it passes.

During a brittle test and the shingle is loosened at its lower edge from the shingle below it. This is especially true for roofs covered with asphalt shingles which can become brittle over time in turn leading to more serious roofing issues if they are not replaced. If the shingle breaks then the shingle is brittle and the roof probably needs to be replaced. The brittle shingle test.

U test the shingle by lifting bending it at a 45 angle. Functional damage to roofing materials from hail has been defined as the diminution of water shedding capability or reduction of the expected service life of the roofing material 13. That slope is not repairable due to brittle. In effect the test they employ is bending a shingle corner against itself 180 degrees and pressing down on the crease as is shown in the diagram below.

The second step is to quantify the damage on each directional slope by examining test areas. Figure 4 an illustration of the brittleness test where a shingle corner is pinched. If it cracks creases or breaks during the test or at the 45 fail. It is then raised and lowered 45 degrees three times.

That slope is repairable. The roof system and differentiate hail damage from non hail damage. Each slope stands on it s own at this point until depends on carrier you ve hit the 65 rule. However if during the test the shingle creases tears cracks or splits the shingle has failed the test.