Technical Specifications

General Instructions
Summit® 60 shall be applied to properly ventilated, building code-approved roof decks. Before getting started, be sure the roof
deck is clean, solid, properly fastened, and free of voids and/or damages.
Begin by unrolling the underlayment from left to right, noting that the printed side should be facing up for installation. Plastic cap
fasteners, with a 1” minimum length and 1” minimum cap diameter, must be used to secure Summit® 60 properly. To secure, follow
along the indicated fastener placement lines at the top and bottom to space fasteners at 6” O.C. horizontally. Then, follow along
the indicated center lines to space fasteners at 12” O.C.
When more than one piece is required to continue a course, overlapping is necessary. The overlaps at the top and bottom should
be a minimum of 4”. The fasteners should be placed 2” in from the edge of the top and bottom laps. The end overlaps should be
12” minimum and fastened vertically at 12” O.C., staying 2” in from the end of the top layer.
The plastic cap fasteners should be driven tightly in the surface of the Summit® 60, being careful not to cut into the sheet. If any
damage to Summit® 60 occurs, it must be repaired before continuing on to the next step. ASTM-approved peel-and-stick flashing
tape (or equivalent) can be used to repair seams, joints, and tears. Cold-applied adhesives may be used at this point to supplement
seal joints, flashings, and overlaps.
For best results, Summit® 60 should be extended at least 12” past all hips and valleys. If Summit® 60 is being installed on decks with
less than 4 in 12 slopes, it should be applied in a double coverage method. Here, the overlap of each installed course should be 24”,
rather than the normal 4”. It is acceptable to drive the fasteners through both layers to secure.
Always follow the ARMA (Asphalt Roof Manufacturing Association) recommendations for installing shingle underlayments and
flashings for best roofing practices.
Note: If local building code or jurisdiction requires the use of metal cap fasteners in lieu of plastic cap fasteners, clear latex sealant
must be added to the underside of every metal cap and nail head if the roof needs to be kept watertight during installation.
Examples where complete water tightness may not be a primary concern are new construction with unfinished interiors or
re-roofing applications where the final roof covering is installed immediately. Product tears, leaks, or any other product
performance issues due to the use of metal/tin cap fasteners is not covered under the product warranty.
Caution
Learn and observe safe roofing practices
according to OSHA and local building code
requirements. Always use caution when walking on
sloped roof decks and Summit® 60 underlayment.
Do not walk on unsecured underlayment or any
other loose roofing material lying on sloped roof
decks. Dust, dew, water, or debris create unsafe
conditions on the roof. The presence of any foreign
matter may drastically change the coefficient of friction
(traction) on Summit® 60 or any other material on a
sloped roof deck. Failure to use proper safety equipment
and footwear can result in serious injury or even death.
Summit® 60 Field Application
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Atlas offers homeowners increased coverage of their
Premium Protection Period on any Atlas Signature Select
®
Roofing System. This product qualifies for use in the
Atlas Signature Select
®
Roofing System when used in
combination with other qualifying Atlas products. For
more information, please visit:
AtlasRoofing.com/Pro.
Summit® 60
Underlayment
Drip Edge At Eaves
Applied Directly
To Deck
12" End Lap Min.
4" Top Lap Min.
Drip Edge At Rake
Applied Over
Underlayment
Code-Approved
Deck
6’ min.
2" From Edge
12"o.c.
24"o.c.