Document 5aJ735gBnnLN8zjNRNmG9EZ5

MEMORANDUM To Distribution From J. A. Hixon - BB Date March 23, 1977 Subject PRODUCT DEVELOPMENT PROGRESS REPORT GLASS MAT VS. ORGANIC FELT SHINGLES - PROJECT #006, REPORT,#8- 3/14/77 PERSONAL AND CONFIDENTIAL The subject report, as released by C. J. Patenaude and J. A Thohey, must be treated with extreme confidentiality. The information contained within this report is not to be dis cussed with anyone outside of those people listed on this distribution list. JAH/1 Distribution A. W. Schnizer C. A. Homan w-* D. E. Frazier F. W. Wood L. C. Niese cc: R. E. Heim BIRD 011448 f .. " PRODUCT DEVELOPMENT PROGRESS REPORT BUILDING MATERIALS DIVISION BIRD & SON, inc. BE- Dr. Schnizer 7BBQ- Mr. Homan BBR- Mr. Frazier BBR- Mr. Wood BC- Mr. Niese Project No. Report No._ Date 006 8 3/14/77 Project Title: WORK ON ROOFING TO MEET U/L REQUIREMENTS Subject; Glass Mat vs. Organic Felt Shingles Object: .-.To compare the physical properties of shingles made from organic felt with those made from Johns-Manville Dura-Glass 7106, 3.0 Ibs./lOO sq. ft. Conclusions: ' 1. Generally, the asphalt shingles made with J-M 3.0 lb. glass mat are equally y as good and in some cases exceed the physical properties of organic felt shingles. 2. A possible weakness in shingles made with this mat is its excessive flexi bility when hot (150F.) 3. d-M and Bird shingles made with the 3.0 lb. glass mat are more resistant to shattering at 0F. than the organic felt shingles. They resist cracking when bent around a mandrel of 3/4" radius. They are equally as strong, and they are just as tear resistant as organic felt shingles. 4. When subjected to 60 mph wind speeds for 10 minutes, the unsealed 3.0 lb. glass mat shingle did not tear around the roofing nails. However, unsealed organic felt shingles tore badly around the roofing nails under identical conditions. Recommendation: Bird & Son should not delay in working towards the goal of being self-sufficient in the manufacture of 3.0 lb. glass mat. 'J BIRD 011449 PRODUCT DEVELOPMENT PROGRESS REPORT Project No._____ 006 Report No. 8 Page 2. Discussions: At the request of Mr. Niese, BBH ran tensile tests, mandrel bend tests, shatter tests, flexibility tests, tear tests, and wind tests on both organic felt shingles and glass mat shingles. An effort was made to determine the drawbacks, if any, that might be present in the glass mat shingle. The glass mat shingles are more resistant to blow-offs than organic felt shingles, as recorded in Table 1. Excessive tearing around the roofing nails of the Wind Seal Shingle occurred with a sustained wind speed of 70 mph for 15 minutes, but only slight tearing for the Firescreen fg 3-tab shingle. The other test results are presented in Tables 2, 3, 4, 5, and 6 and show convincingly that organic felt shingles are generally inferior to those made with J-M's 3.0 lb., glass mat. References: Patenaude, C.J., Laboratory Notebook BBH #237-, pp. 11-17 vfJPatenaude/ JATwohey/ rP Attach. BIRD 011450 TABLE 1 WIND TEST Time minutes Firescreen fg 3-Tab Shingle FK, July 1, 1976, White J-M Dura-Glass 7106 3.0 lbs,/TOO sq. ft. Room Temp. 76-78F. ' Wind Seal Shingle FS, Lot 5079S Room Temp. 76-78F. 5 1/32" lift, very si. flutter 10 1/8" lift, consid. flutter 5 Target course tab 3 1/4" lift, other shingle tabs laying flat 3/8" lift, si. flutter 1/4" lift, si. flutter V lift, si. flutter 10 Target course tab 3 1/2" lift, other shingle tabs laying flat 1 1/8" lift, si. flutter 5 Target course tab 4 3/4" lift. Other shingle tabs laying flat 2" lift, mod. flutter 10 Target course tab nearly perpendicular 2 1/4" lift, mod. flutter to board, other shingle tabs laying flat 5 Target course tab bending backwards, other shingle tabs laying flat 10 Same as above 5 Target course tab bending backwards, no tearing around nails Target course tab 3 1/2" lift, other shingle tabs laying flat Same as above Target course tabs are vertical shingle tabs torn badly around two nails 10 Same as above Same as above -------New Target Course------- 5 Starting to tear around two nails Shingle tabs torn completely around one nail and slightly around two more nails 10 Slight tear around two nails Shingle tabs torn badly around two nails. 15 Slight tear around two nails Shingle tabs torn badly around four nails BIRD 011451 TABLE 2 TEAR TEST Scott Tester. 5" x 7" shingle samples with a center 4" long slit cut parallel to long direction of sample. Samples are held in Scott Tester with one end in top clamp and other end bent down and clamped in bottom clamp. Shinqles llind Seal (thick butt), FB Woodscape (flat), FK Fire/Tech fg, FK (J-M Dura-Glass, 7106, 3.0 lbs./100 sq. ft.) (Ave. of 3, Room Temp. , 12 inches/min.) Across Machine Direction Machine Direction 3.7 lbs. 2.9 lbs. 2.9 lbs. 2.3 lbs. 2.7 lbs. 2.6 lbs. Rampart, Johns-Manville \(J-M Dura-Glass 7106 ) 3.0 lbs./TOO sq. ft.) 3.7 lbs. 3.4 lbs. I ') BIRD 011452 TABLE 3 TENSILE TEST Scott Tester: size of sample 1" x 6" |j Shingles Wind Sea] (thick butt). Woodscape (fiat), FK Fire/Tech fg, FK (J-M Dura-Glass 7106 3.0 lbs./100 sq. ft.) Rampart, Johns-Hanville jj-M Dura-Glass 7106 3.0 Ibs./lOO sq. ft.) (Ave. of 3, Room temp., 12 inches/min.) Across Machine Direction"Machine Direction 79 Ibs./sq. in. 117 Ibs./sq. in. 84 Ibs./sq. in. 115 ibs./sq. in. 60 Ibs./sq. in. 123 Ibs./sq. in. 75 lbs./sq. in. 118 Ibs./sq. in. "!*1 TABLE 4 FLEXIBILITY TEST Shingles are heated in oven set at 150F. Support shingle only in the middle with your hand. Shingles Wf;nd Seal (thick butt), FB aw* Woodscape (flat), FK Jet (thick butt), FB Fire/Tech fg, FK (J-M Dura-Glass 7106, 3.0 Ibs./lOO sq. ft.) '''%mpart, Johns-Manville . /J-M Dura-Glass 7106, 3.0 Ibs./lOO sq. ft.) Comments Bent without cracking Bent and cracked near center cut-outs Bent without cracking Bent and cracked where supported Bent and cracked where supported BIRD 011454 TABLE 5 MANDREL BEND TEST Shingles Wijjid Seal (thick butt), FB Size of sample: 1" x 6" Mandrel 3/4" radius (Ave. of 3) Room Temperature Across Machine Machine Pi rection Direction _______________33f F.___________ Across Machine Machine Direction Directi on Cracked Cracked Broke in half Broke in half Woodscape (flat), FK SI. cracked SI. cracked Broke in half Broke in half Fire/Tech fg, FK (J-M Dura-Glass 7106 3.0 1bs-/TOO sq. ft.) No cracks SI. Cracked SI. cracked Consid. cracked Rampart, Johns-Manville (J-M Dura-Glass 7106 -J3.0-lbs./100 sq. ft.) No cracks No cracks SI. cracked SI. cracked j i i BIRD 011455 TABLE 6 . SHATTER TEST Cool shingle tab in freezer to 0F. Bang shingle tab against sharp metal edge. Shingles Wlind Seal (thick butt), FB Wocdscape (flat),'FK Fire/Tech fg, FK (J-M Dura-Glass 7106, 3.0 Ibs./lOO sq. ft.) Rampart, Oohns-Manville (J-H Dura-Glass 7106., 3.0 Ibs./lOO sq. ft.) Comments Broke in half Broke in half Broke in half Cracked from butt to center. Shingle tab did not break in half .) BIRD 011456