Hail Resistance of Roofing ProductsBuilding Research Division, U.S. Institute for Applied Technology, 1969 - 9 pages |
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Page 6
From these results , it would seem that the solidly supported roofings performed better than those with some soft underlying layer in their construction . This observation is consistent with the fact that shingle materials are stronger ...
From these results , it would seem that the solidly supported roofings performed better than those with some soft underlying layer in their construction . This observation is consistent with the fact that shingle materials are stronger ...
Page 7
Some of the conventionally made heavy shingles , usually with Number 9 granules or with high concentrations of mineral additives , performed equally well . One Type 290 Class C shingle actually had a damage threshold at the 234 - in ...
Some of the conventionally made heavy shingles , usually with Number 9 granules or with high concentrations of mineral additives , performed equally well . One Type 290 Class C shingle actually had a damage threshold at the 234 - in ...
Page 8
In summary , each roofing membrane performed better on the denser substrates than on the lighter substrates , the roofings made with inorganic felts performed better than those made with organic felts and the slag surfaced roofing was ...
In summary , each roofing membrane performed better on the denser substrates than on the lighter substrates , the roofings made with inorganic felts performed better than those made with organic felts and the slag surfaced roofing was ...
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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 |