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ESR-1601 I Most�dely Accepted and Trusted Page 2 of 2 (610 mm)to the centeriine of the underlying course to form codes listed in Section 1 0 of this report, subject to the two layers with 6-inch (152 mm) vertical laps. Seams in following conditions: laps must be sealed with adhesives complying with ASTM 5.7 Installation must comply with this report and the D4586,Type 1.Subsequent courses of underlayment must manufacturer's published installation instructions, and be installed parallel to the eave, from the lower edge me applicable code. In the event of conflict between upwards to the ridge, in a shingle manner The �e published installation instructions and this report, underlayment must be mechanically fastened as specified the more restrictive must govem. in Section 4.2. 4.3 Ice BarNer: 5.2 Installation must be limited to roofs with a minimum slope of 2:12 (17 percent slope) or to the minimum In areas of the roof required to have an ice barrier under slope required for the roof covering in accordance Chapter 15 of the IBC or Chapter 9 of the IRC, two layers with the applicable code,whichever is greater of the underlayment must be cemented together with a roofing cement complying with ASTM D4586, for a 5.3 Installation must be limited to use with roof coverings minimum distance of 24 inches (610 mm) inside the that do not involve hot asphalt or coal-tar pitch. exterior wall line of the building. The roof underlayment, in 5.4 Installation must be limited to solid substrates the field of the roof,must overlap the ice barrier complying with the applicable code. 4.4 Flashing: 5.5 Installation must be limited to use with approved roof Flashing must be in accordance with the applicable code. coverings that are mechanicatly fastened through the Flashing around protrusions must be over the lower course underlayment to the sheathing or rafters, or to use of the underlayment and under the upper course of the with approved roof coverings that are mechanically underlayment,to prevent water badcup.When used,metal fastened to battens or counterbattens that are drip edges must be installed beneath the underlayment at mechanically fastened through the underlayment to the eaves and over the underlayment at rakes. the sheathing or rafters. 4.5 Classified Roofs: 5.6 Installation must be limited to roofs with ventilated Under the 2012 and 2009 IBC and IRC, the roofing attic spaces in accordance with the requirements of underlayments may be used as components of Gassified the applicable code. roof assemblies consisting of Class A or C glass fiber mat 5.7 The products are manufactured in Valdosta, Georgia, shingle or Class C asphalt organic felt shingle complying under a qualiry control program with inspections by with the applicable code,when ins talled in accordance with R,qDCO(AA-650). this report over a minimum /�-inch-thidc (11.9 mm) plywood deck. 6.0 EVIDENCE SUBMITTED Under the 2006 IBC, the underlayment may be used in 6.1 Data in accordance with the ICC-ES Acceptance Class A or Class B roof assemblies that utilize the roof Criteria for Roof Underlayments (AC188), dated coverings specified in the excep6on to Sections 1505.2 February 2012. and 1505.3. Under the 2006 IRC, the underlayment may be used with roof coverings of bridc, masonry, slate, Gay 6.2 Report of testing in accordance with ASTM E108 or concrete roof tile, concrete roof deck, ferrous or copper (UL 790). shingles or sheets, and metal sheets and shingles where 7,0 IDENTIFICATION such roof coverings are permitted to be used in lieu of a Class A assembly under Section R902.1 Each roll of the product described in this report must be 5.0 CONDITIONS OF USE marked with the manufacturer's name (Alpha ProTech Engineered Products, Inc.) and address, the product The REXTM' SynFelt, REXtreme and TECHNOpIy synthetic name, the date of manufacture, the evaluation report roof underlayments described in this report comply with,or number (ESR-1601), and the name of the inspection are suitable altematives to what is specified in, those agency(RADCO).