Hail Resistance of Roofing ProductsBuilding Research Division, U.S. Institute for Applied Technology, 1969 - 9 pages |
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Shooting hailstones at roofing 3.2 . Evaluating failure 4. Results 4.1 . Asphalt shingles 4.2 . Built - up roofs Page 1 3 3 3 4 4 5 5 5 5 6 7 8 9 9 Hail Resistance of Roofing Products Sidney H. Greenfeld A test.
Shooting hailstones at roofing 3.2 . Evaluating failure 4. Results 4.1 . Asphalt shingles 4.2 . Built - up roofs Page 1 3 3 3 4 4 5 5 5 5 6 7 8 9 9 Hail Resistance of Roofing Products Sidney H. Greenfeld A test.
Page 1
( d ) Heavier shingles tend to be more hail - resistant than Type 235 shingles . ( e ) Weathering tends to lower the hail resistance of asphalt shingles . ( f ) Built - up roofs on dense substrates tend to resist hail better than those ...
( d ) Heavier shingles tend to be more hail - resistant than Type 235 shingles . ( e ) Weathering tends to lower the hail resistance of asphalt shingles . ( f ) Built - up roofs on dense substrates tend to resist hail better than those ...
Page 6
The results are reported under the types of roofing studied . 4.1 . Asphalt Shingles When applied according to the recommendations of their manufacturers , Type 235 squaretab shingles have three regions of different vulnerability : ( 1 ) ...
The results are reported under the types of roofing studied . 4.1 . Asphalt Shingles When applied according to the recommendations of their manufacturers , Type 235 squaretab shingles have three regions of different vulnerability : ( 1 ) ...
Page 7
Similarly , three other shingles , all Class A , based on glass mat felts showed no felt damage on their obverse sides with hailstones below 2 in ( 5.1 cm ) in diameter ; one of these had a damage threshold at the 21 / 2 - in ( 6.4 cm ) ...
Similarly , three other shingles , all Class A , based on glass mat felts showed no felt damage on their obverse sides with hailstones below 2 in ( 5.1 cm ) in diameter ; one of these had a damage threshold at the 21 / 2 - in ( 6.4 cm ) ...
Page 9
Threshold of hail damage for nonbituminous roofing y - in ( 0.3 cm ) Asbestos cement shingles . ... As with the asphalt shingles , these other products contained areas of different vulnerability . 5. Conclusions 6.
Threshold of hail damage for nonbituminous roofing y - in ( 0.3 cm ) Asbestos cement shingles . ... As with the asphalt shingles , these other products contained areas of different vulnerability . 5. Conclusions 6.
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Bibliographic information
| Title | Hail Resistance of Roofing Products Volume 23 of Building science series, United States National Bureau of Standards Volume 23 of National Bureau of Standards building science series |
| Author | Sidney H. Greenfeld |
| Contributor | Institute for Applied Technology (U.S.). Building Research Division |
| Publisher | Building Research Division, U.S. Institute for Applied Technology, 1969 |
| Original from | the University of Michigan |
| Digitized | 18 Aug 2006 |
| Length | 9 pages |
| Export Citation | BiBTeX EndNote RefMan |