Installation Guide

ManualsBrandsGCP Applied Technologies ManualsBuilding materialsUltra 198 sq. ft. Roll Roofing Underlayment

Grace Construction Products

GRACE ULTRA

™

Self-adhered rooﬁng underlayment for

the highest temperature applications

Product Description

Grace Ultra

™

roong underlayment is composed of two

waterproong materials—an aggressive butyl rubber

based adhesive backed by a layer of high density cross

laminated polyethylene.

The product is 30 mils (0.76 mm) thick making it easy

to handle and apply. The unique, advanced adhesive

formulation offers premium adhesion to the roof deck,

high quality laps, superior seal around roong fasten-

ers, and outstanding high temperature stability.

The adhesive is backed by a protective plastic release

liner that protects its adhesive quality. The release liner

is easily removed allowing the adhesive to be bonded

tightly to the roof deck.

The membrane comes in a 198 ft

(18.4 m

) roll, and

measures 34 in. (864 mm) wide.

Features & Benets

Easy to handle and apply—The membrane bonds

rmly to the roof deck and forms high quality laps.

Self sealing—The membrane meets key building code

standards for nail sealability of self-adhered roong

underlayments.

Heat resistance—The membrane is specially formu-

lated to resist temperatures up to 300°F without

degradation of the butyl adhesive.

Better Chemical Resistance— Compatible with low

slope roong materials such as EPDM and TPO

Slip resistant surface—The slip resistant surface

maximizes traction for safety without compromising

the water integrity of the laps.

Plastic release—Plastic is easy to remove and easy to

dispose of.

Reroofable—Unlike some granular surfaced

membranes, Grace Ultra

™

underlayment will not adhere

to the underside of the exposed roof covering making

reroong easier and less costly.

Grace expertise—Grace is the recognized leader

in self-adhered roong underlayments and is the

manufacturer of Grace Ice & Water Shield

roong

underlayment.

Guidelines for Use

Grace Ultra

™

membrane can be used as a sloped roof

underlayment to help protect against leakage from

water that builds up behind ice dams, or from wind-

driven rain in applications where the membrane must

withstand the highest in-service temperatures for

extended periods of time.

High Temperature Applications

Grace Ultra

™

membrane is the appropriate product

for all applications where superior heat resistance is

Summary of content (4 pages)

PAGE 1
Grace Construction Products GRACE ULTRA™ Self-adhered roofing underlayment for the highest temperature applications Product Description Grace Ultra™ roofing underlayment is composed of two waterproofing materials—an aggressive butyl rubber based adhesive backed by a layer of high density cross laminated polyethylene. The product is 30 mils (0.76 mm) thick making it easy to handle and apply.
PAGE 2
needed. In addition, Grace Ultra™ underlayment is the appropriate product for use under certain types of metal roofs (those employing copper, zinc, or Cor-Ten® panels). These metal roofs tend to readily conduct heat to the underlayment making them more likely to expose the membrane to high temperatures. It is up to the contractor and specifier to decide what level of performance is required based on the guidelines provided. Wind-Driven Rain Sloped roofs are not waterproof.
PAGE 3
roll. Stop frequently to press the membrane in place with heavy hand pressure. When finished with the roll go back to the beginning, reroll and pull the remaining release paper from the material, finishing the installation. Consistent with good roofing practice, install the membrane such that all laps shed water. Always work from the low point to the high point of the roof. Apply the membrane in valleys before the membrane is applied to the eaves.
PAGE 4
Product Data Roll length Roll width Roll size Packaging Roll weight Rolls per pallet 70 ft (21.3 m) 34 in. (864 mm) 198 ft2 (18.4 m2) Corrugated cartons 42 lbs (19.0 kg) 25 Performance Properties Property Color Thickness, membrane Tensile strength, membrane Elongation, membrane Low temperature flexibility Adhesion to plywood Permeance (max) Material weight installed (max) Adhesive Value Gray-black 30 mil (0.76 mm) 250 psi (1720 kN/m2) 250% Unaffected @ -20°F (-29°C) 3.0 lbs/in. width (525 N/m) 0.