ASTM WK11211

    Work Item: ASTM WK11211 - Revision of D1970 - 01 Standard Specification for Self-Adhering Polymer Modified Bituminous Sheet Materials Used as Steep Roofing Underlayment for Ice Dam Protection

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    Developed by Subcommittee: D08.02 | Committee D08 | Contact Staff Manager



    1. Rationale

    Revision of D 1970-01. Standard Specification for Self-Adhering Polymer Modified Bituminous Sheet Materials Used as Steep Roofing Underlayment for Ice Dam Protection. Husnu Kalkanoglu, Technical Contact and Chairman, Task Group D08-02-05. Delete the Current Section 7.9 and replace with the following New Sections 7.9 and 7.10. 7.9 Lap Integrity (Head of Water Test) 7.9.1 This test method determines the waterproof integrity of lap seams formed according to the manufacturers' instructions or rolled as described in 7.4.1.2 at 23 ± 2°C (73.4 ± 3.6°F). 7.9.2 Specimens: 7.9.2.1 The test specimen shall consist of two pieces of sheet, one with a selvage along the longer dimension, 200 by 300 mm (8 by 12 in.) ±5 % with the centerline of the selvage centered on a piece of 10-mm (3/8-in.) minimum thick, 300 by 300 mm (12 by 12 in.) ±5 % APA Grade, Exposure 1 plywood. The second piece (no selvage) shall have dimensions of 200 by 250 mm (8 by 10 in) ±5 %. 7.9.2.2 At least one specimen shall be tested for each sample roll. 7.9.3 Procedure: 7.9.3.1 At room temperature (23 ± 2°C (73.4 ± 3.6°F)) peel the entire release paper or film off the 200 by 300 mm (8 by 12 in) self-adhesive sheet and place the sheet on the plywood. Roll the sheet as described in 7.4.1.2. Place the 200 by 250 (8 by 10) sheet (with release film partially peeled off to expose sufficient bottom coating to cover the selvage) over the selvage positioned in a way to allow 25 mm (1 in) ±5 % of the selvage below to be exposed on each side per Figure 1 and press down the edges of the sheet manually with finger pressure just hard enough to keep them from lifting. Roll the lap as specified in 7.4.1.2. The top sheet must only be adhered over the selvage, and must be loose over plywood past the selvage area. 7.9.3.2 Cut the bottom out of a 4-L (1-gal) can with a can opener and center it, bottom side down, on the membrane centering it with the inner edge of the selvage. Apply a 6-mm (0.25-in.) bead of silicone sealant completely around the outside rim of the can to bond it to the membrane. As shown in Figure 1, apply the bead of caulk around all three edges of the upper membrane until the end of the selvage area. Allow 2 h for the sealant to cure, then apply another bead around the inside rim of the can. 7.9.3.3 After waiting 24 h at ambient temperature for the sealant to cure, fill the can to a depth of 127 mm (5 in.) +/-5%with deionized or distilled water. Set the test assembly over a container capable of catching all the water in case there is a leak. Place the entire assembly in a refrigeration unit maintained at 4 ± 1.1°C (40 ± 2°F) for a period of three days. 7.9.3.4 At the conclusion of the test, remove the can and plywood. Pour the water from the top can and blot the inside dry. Peel the can from the sheet then lift the top sheet, and inspect the underside for any signs of water. 7.9.4 Report—Observe and report whether or not water is found on the plywood underneath the 200 by 250 mm (8 by 10 in) sheet adjacent to the seam. Report as a failure if water is present in any this area, or as a pass if dry. Figure 1 – Lap Integrity Test Sample Preparation. 7.10 Seal around Fasteners 7.10.1 This test method determines the capability of the underlayment membrane to seal around a fastener that penetrates the membrane 7.10.2 Specimens: 7.10.2.1 The test specimen shall consist of one piece of underlayment sheet 300 by 300 mm (12 by 12 in.) ±5 % centered on a piece of 10-mm (3/8-in.) minimum thick (APA Grade, Exposure 1) plywood, of the same dimensions. 7.10.2.2 At least two specimens shall be tested for each sample roll. 7.10.3 Procedure: 7.10.3.1 At room temperature (23 ± 2°C (73.4 ± 3.6°F)) peel the release paper or film off the self-adhesive underlayment sheet and place the sheet on the plywood. Press down the edges of the sheet manually with finger pressure just hard enough to keep them from lifting. Roll membrane as specified in 7.4.1.2. 7.10.3.2 With two pieces of lumber placed underneath the plywood for support, drive two 32-mm (1.25-in.) galvanized roofing nails, 25 to 51 mm (1 to 2 in.) apart, near the center of the plywood so that the nail heads are 6 ± 1.5 mm (0.25 ± 0.06 in) above the surface of the sheet. 7.10.3.3 Cut the bottom out of a 4-L (1-gal) can with a can opener and center it in reference to two nails, bottom side down, on the membrane. Apply a 6-mm (0.25-in.) bead of silicone sealant completely around the outside rim of the can to bond it to the membrane. Allow 2 h for the sealant to set, then apply another bead around the inside rim of the can. 7.10.3.4 After waiting 24 h at ambient temperature the sealant to cure, place this assembly atop another 1-gal can which has the lid removed and the bottom intact. Fill the upper can to a depth of 127 mm (5 in.) with deionized or distilled water. Place the entire assembly in a refrigeration unit maintained at 4 ± 2°C (40 ± 5°F) for a period of three days. 7.10.3.5 At the conclusion of the test, remove the top can and plywood from the refrigerator and note any water in the bottom can, on the shanks of the nails, or on the underside of the plywood. Pour the water from the top can and blot the inside dry. Peel the top can from the underlayment sheet then peel the sheet back to the nails and inspect the underside for any signs of water. 7.10.4 Report—Observe and report whether or not water is found in the bottom can, on the nail shanks, on the underside of the plywood, or between the plywood and the underlayment sheet. Report as a failure if water is present in any of these areas, or as a pass if dry. RATIONALE: This revision addresses previous comments and negative votes regarding deficiencies in the current procedure, and clarifies and separates the procedures for Lap Integrity and Seal around Fasteners.


    Keywords

    ice dam protection; polymer-modified; self-adhering; steep roofing; underlayment;
    Citing ASTM Standards
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    Work Item Status

    Date Initiated:
    4-26-2006

    Technical Contact:
    Husnu Kalkanoglu

    Item:
    001

    Ballot:
    D08.02 (10-03)

    Status:
    On Hold

    Item:
    001

    Ballot:
    D08 (08-05)

    Status:
    Ballot Item Approved as D1970-09 and Published

    Item:
    001

    Ballot:
    D08 (13-03)

    Status:
    Ballot Item Approved as D1970/D1970M-2013A and Pending Publication

    Item:
    002

    Ballot:
    D08 (08-04)

    Status:
    Ballot Item Approved as D1970-09 and Published

    Item:
    002

    Ballot:
    D08 (08-05)

    Status:
    Ballot Item Approved as D1970-09 and Published

    Item:
    003

    Ballot:
    D08 (11-02)

    Status:
    Ballot Item Approved as D1970-2011 and Pending Publication

    Item:
    005

    Ballot:
    D08 (13-01)

    Status:
    Ballot Item Approved as D1970/D1970M-2013 and Pending Publication

    Item:
    011

    Ballot:
    D08 (08-01)

    Status:
    Ballot Item Approved as D1970-08 and Published