The following specification text has been prepared to assist design professionals in the preparation of a specification section incorporating Epilay PlyStik Plus rubberized asphalt roofing underlayment for use under steep-slope slate shingles, asphalt shingles, wood shingles, clay and concrete roofing tiles, and metal shingles and roof panels.

Epilay PlyStik Plus is a premium heavy duty high-temperature peel-and-stick underlayment designed for rooftop and certain wall applications.

Utilize the following paragraphs to insert text into the following Specification Sections or similarly titled section governing this work:

	07 31 13 - Asphalt Shingles
	07 31 16 - Metal Shingles
	07 31 26 - Slate Shingles
	07 32 13 - Clay Roof Tiles
	07 32 16 - Concrete Roof Tiles
	07 32 19 - Wood Shingles
	07 41 13 - Metal Roof Panels

Blue text includes instructions on how to use this document. Black text is intended for insertion into project specifications. Red text requires input by the user.

For assistance on the use of the products in this section, contact Epilay at (310) 320-6300, by email at info@epilay.com, or visit their website at www.epilay.com.

PART 1 - GENERAL

SUBMITTALS

Include the following for submission of product data.

	A.	Product Data: Manufacturer’s descriptive data and application instructions.

DELIVERY, STORAGE AND HANDLING

	A.	Store underlayment between 40 and 90 degrees F, upright, in original containers.

	B.	Remove rolls from storage area on day of usage.

PROJECT CONDITIONS

	A.	When possible apply underlayment when air and surface temperatures are above 40 degrees F.

WARRANTIES

	A.	Provide roofing underlayment manufacturer’s lifetime warranty against deterioration and failure of underlayment to repel water.

PART 2 - PRODUCTS

MATERIALS

Epilay PlyStik offers the following beneficial attributes:

•	The spunbond nonwoven surface provides for better walkability during roofing application.
•	The underlayment may be left exposed to ultraviolet for up to 180 days.
•	The self-sealing overlap provides for a complete cohesive bond.

	A.	Roofing Underlayment:
		1.	Source: Epilay PlyStik Plus by Epilay www.epilay.com; [refer to Division 01 for substitution requirements.] [substitutions not permitted.]
		2.	Description: SBS modified bitumen coated synthetic roofing underlayment for steep-slope roofs, self-adhering with silicone treated release liner, nonabsorbent, ultraviolet resistant, 100 percent recyclable.
		3.	Composition: Three plies of cross woven coated polypropylene, one ply non- woven polypropylene, and one layer of SBS modified bitumen.
		4.	Thickness: 48 mils.
		5.	Width: 36 inches.
		6.	Fire rating: Class A, tested to ASTM E108.
		7.	Physical characteristics:
			a.	Unrollability: No wrinkling, stiffness, cracking, tearing, or other damage, tested to ASTM D1970.
			b.	Nail sealability: Pass ASTM D1970.
			c.	Permeability: 0.03, tested to ASTME96/E96M.
			d.	Water transmission: Pass ASTM D4869.
			e.	Tear strength: Machine direction 163 pounds, cross direction 184 pounds, tested to ASTM D4533.
			f.	Tensile strength: Machine direction 115 pounds, cross direction 128 pounds, tested to ASTM D751.
			h.	Adhesion to plywood: 9.4 at 40 degrees F, 13.3 at 75 degrees F, tested to ASTM D1970.
			i.	Thermal stability: Pass ASTM D1970.
			j.	Low temperature flexibility: Pass ICC AC 48.
		8.	Service temperature range: Minus 40 to plus 260 degrees F.

ACCESSORIES

	A.	Primer: ASTM D41.

	B.	Fasteners: 3/8 inch head galvanized steel roofing nails, minimum 1 inch long.

PART 3 - EXECUTION

PREPARATION

	A.	Prepare deck surfaces; remove protrusions and debris that could prevent adhesion or damage underlayment. 

	B.	Do not install underlayment until deck is free of moisture.

	C.	Prime surfaces if temperature at time of installation is below 40 degrees F.

	D.	Prime concrete and masonry surfaces.

INSTALLATION

Contact Epilay if installation is required on roof slopes less than 2:12 or on vertical surfaces.

	A.	Starting at low edge, apply one ply of underlayment horizontally over substrate with printed side up.

	B.	Weatherlap each sheet 3 inches over preceding sheet. Lap vertical ends 6 inches minimum. 

	C.	Press to full bond with substrate without voids, wrinkles, bridging, or fishmouths. Seal ends and edges.

	D.	At temperatures below 40 degrees F on all decks and above 100 degrees F on wood decks, blind nail laps in overlap area as needed. Do not nail at unsupported locations.

	E.	At valleys, apply one ply underlayment centered over valley. Work outward from center, starting at low point. Do not weave product into valleys. Apply to valleys before applying to eaves.

	F.	At ridges, apply one ply underlayment centered over ridge. Work outward from center.

	G.	Lap underlayment over metal drip edges.

	H.	Extend minimum 4 inches up abutting vertical surfaces.

	I.	Repair holes, fishmouths, tears, and other damage with round membrane patch extending minimum 6 inches past damaged area on all sides. 

01/03/2020