DELTA®-ROOF

The reinforced roof underlayment that adds extra protection and value to your roof. This 4-layer material - designed to be installed under asphalt shingles - is totally waterproof, wind resistant, supertough, and easy to install.

ICC-ES Evaluation Report (AC48 & AC188)

ICC ESR-2625

Properties

DELTA®-ROOF combines excellent material properties to provide superior protection to the roof against rainwater, snow, wind, and dust. The membrane is lightweight and easy to install, and at the same time far more resilient than conventional asphalt saturated base sheet. Its strong reinforcement mesh makes this underlayment extremely tear resistant, even when exposed to high winds.

DELTA®-ROOF has been designed to provide ultimate protection to ventilated pitched roofs with asphalt shingles. Its low vapor permeability helps to prevent buckling of asphalt shingles caused by solar driven moisture that would usually cause the sheeting boards to swell and expand.

Material

Outside layers made from spun-bonded Polypropylene for excellent physical properties, combined with an inner waterproof polymer layer and reinforcement grid.

Application

The surface texture provides high abrasion resistance, prevents slipping and makes DELTA®-ROOF very user-friendly. In comparison to bitumen and asphalt saturated sheathing membranes DELTA®-ROOF is pleasantly lightweight. The material is available in rolls 4.9 ft (1.5 m) wide and 164 ft (50 m) long, ensuring fast and easy installation.

Technical Data

Product name	DELTA®-ROOF
Color	black / grey
Water vapor transmission	0.415 g/m²/24 h	ASTM E96-05, Proc. B
Permeance	0.06 perms [grains/h/ft²/in Hg]	ASTM E96-05, Proc. B
Breaking load	MD 146.9 lb/2in CD 137.6 lb/2in	ASTM D5035-06
Elongation at break	MD 17.7 % CD 18.3 %	ASTM D5035-06
Trapezoid tearing strength	MD 41.6 lb CD 36.1 lb	ASTM D4533-04
Tear Resistance	MD: 2624 g CD: 2975 g	ASTM D1922-03a
Fastener pull-through force	284 N	ASTM D3462-03
Water penetration resistance	795 cm	CAN/CGSB-4.2 #26.3-95
Water impact penetration resistance	no water passing	AATCC 42-2000
Flame Spread	5 NFPA Class A; UBC Class I	ASTM E84-09
Smoke developed	100 NFPA Class A; UBC Class I	ASTM E84-09
Air permeance	< 0.02 l/(s x m²) @ 75 Pa	ASTM E2178
Temperature range	-40 °F to +176 °F (-40 °C to +80 °C)
Mass per unit area	approx. 6.7 oz/yd² (220g/m²)	CSA A220.1-06 4.4.4
Roll weight	approx. 36 lb (16 kg)
Roll length	164 ft (50m)
Roll width	4.92 ft (1.5 m)
Maximum UV (sunlight) exposure	3 months	Always cover as soon as possible.