Accessory

Right Start™ UDL

Underlayment for Tile Roofs

Made with our industry-leading NEX® Polymer Modified (Rubberized) Asphalt technology, Right Start™ UDL is our go-to, dependable underlayment for withstanding the extra weight of tile roofs.

Underlayment for Shingles and Tile Roofs

A new roof requires more than just shingles. It’s a cohesive, coordinated system of 5 parts: 1) shingles, 2) underlayment, 3) ice and water barrier, 4) starter shingles, and 5) hip & ridge shingles.

 

Underlayment sits under the shingle and provides a vapor barrier covering the entire roof.

 

Malarkey offers two underlayments tailored to asphalt shingle roofs. Right Start™ UDL is a superior underlayment, also suitable for tile roofs.

Water Barrier

Made with our proprietary NEX® Polymer Modified Asphalt for extra strength and durability, Right Start™ UDL is a water resistant membrane applied to the wood decking of the entire roof as an extra layer of water penetration protection and backup to your shingles or tile.

Withstands Weight, Reduces Waste

Fortified with our proprietary NEX® Polymer Modified (Rubberized) Asphalt technology for extra strength and durability, Right Start™ UDL can withstand extreme weight, as well as damage that can often accompany installation, making it the ideal underlayment for heavier, more labor-intensive, asphalt and tile roof installations.

Installed Second

When installing a complete 5-component system for your new roof, underlayment is installed second, after the ice & water barrier, and prior to the start shingles.

Key Features

Modified Asphalt

Made with proprietary NEX Polymer Modified Asphalt for exceptional weathering and extra strength, flexibility, and durability to resist damage and last longer.

Mechanically Fastened

Installed with just enough fasteners (nails or staples) to hold the material firmly in place and work safely (or per adopted building code) until shingles can be applied.

Strong & Durable

Modified asphalt sheets, reinforced with rubber and plastic polymers on a fiberglass mat, deliver greater tear strength than conventional felt membranes for lasting durability.

Water Resistant

Naturally waterproof asphalt helps resist water penetration.

Safer Installation

Sand surface helps prevent accidents by providing an anti-skid surface for workers, and keeps roofing materials from sliding.

UV Stability

Sand surface can withstand 90 days of direct sunlight, providing a waterproof roof for longer duration installations.

Fire Resistance (FR)

Class A fire rated in a system assembly over a combustible or non-combustible deck.

Enhanced Warranty

Enhanced warranties are available when product is used in a complete roofing system of Malarkey shingles and accessories, and installed by a Malarkey Certified Contractor.

Product Details

  Application Method Asphalt Technology Tear Strength* Testing Compliance Thickness Warranties+ Fire Resistance (FR)
Self-Adhered NEX® Exceptional 45 mils ASTM D1970, ASTM E108 Class A Lifetime ASTM E108 Class A when paired with a Class A shingle
Mechanically Fastened NEX® Enhanced 105 ASTM D3909; ASTM D4869; ASTM D6757; ASTM E108 Class A; Intertek CCRR-0333; UL & Intertek Listed Up to 30 years ASTM E108 Class A
Best Right Start™ UDL
Mechanically Fastened NEX Enhanced 50 mils ASTM D4601 Type II; ASTM D4869; ASTM D226 Type II; ASTM D6757 Type II; ICC Approval - ESR-1561; FBC Approvals - #14807 & #15214. Enhanced Yes
 
Best
Application Method

Self-Adhered

Mechanically Fastened

Mechanically Fastened

Asphalt Technology

NEX®

NEX®

NEX

Tear Strength*

Exceptional

Enhanced

Enhanced

Thickness

45 mils

105

50 mils

Testing Compliance

ASTM D1970, ASTM E108 Class A

ASTM D3909; ASTM D4869; ASTM D6757; ASTM E108 Class A; Intertek CCRR-0333; UL & Intertek Listed

ASTM D4601 Type II; ASTM D4869; ASTM D226 Type II; ASTM D6757 Type II; ICC Approval - ESR-1561; FBC Approvals - #14807 & #15214.

Warranties+

Lifetime

Up to 30 years

Enhanced

Fire Resistance (FR)

ASTM E108 Class A when paired with a Class A shingle

ASTM E108 Class A

Yes

Right Start UDL

Malarkey Roofing Products Roll Roofing

Right Start UDL Label

Malarkey Roofing Products Roll Roofing

Technical Specs

SKU: UDL
Length: 66’
Width: 39-3/8″
SQ/Roll: 2
Thickness: 50 mils nominal

 

Testing Compliance

ASTM D4869
ASTM D4601
ASTM D226
ASTM D6757
ASTM E108
FBC Approval #14807
FBC Approval #15214

Shipping Specifications

SQ/Roll: 2
Rolls/Pallet: 30
Rolls/Truckload: 600

PDF Documents

Videos

Warranty

Right Start™ UDL is eligible for expanded warranty coverages relative to its use as a single roofing accessory or in combination with others in a complete Malarkey roofing system. Installed separately, it carries a 10-year product warranty against manufacturing defects. Contact Malarkey’s Technical Services Department for details.

Warranties

Compare Products

  Application Method Asphalt Technology Tear Strength* Testing Compliance Thickness Warranties+ Fire Resistance (FR)
Self-Adhered NEX® Exceptional 45 mils ASTM D1970, ASTM E108 Class A Lifetime ASTM E108 Class A when paired with a Class A shingle
Mechanically Fastened NEX® Enhanced 105 ASTM D3909; ASTM D4869; ASTM D6757; ASTM E108 Class A; Intertek CCRR-0333; UL & Intertek Listed Up to 30 years ASTM E108 Class A
Best Right Start™ UDL
Mechanically Fastened NEX Enhanced 50 mils ASTM D4601 Type II; ASTM D4869; ASTM D226 Type II; ASTM D6757 Type II; ICC Approval - ESR-1561; FBC Approvals - #14807 & #15214. Enhanced Yes
 
Best
Application Method

Self-Adhered

Mechanically Fastened

Mechanically Fastened

Asphalt Technology

NEX®

NEX®

NEX

Tear Strength*

Exceptional

Enhanced

Enhanced

Thickness

45 mils

105

50 mils

Testing Compliance

ASTM D1970, ASTM E108 Class A

ASTM D3909; ASTM D4869; ASTM D6757; ASTM E108 Class A; Intertek CCRR-0333; UL & Intertek Listed

ASTM D4601 Type II; ASTM D4869; ASTM D226 Type II; ASTM D6757 Type II; ICC Approval - ESR-1561; FBC Approvals - #14807 & #15214.

Warranties+

Lifetime

Up to 30 years

Enhanced

Fire Resistance (FR)

ASTM E108 Class A when paired with a Class A shingle

ASTM E108 Class A

Yes

Specifications & Testing

Right Start UDL

Malarkey Roofing Products Roll Roofing

Right Start UDL Label

Malarkey Roofing Products Roll Roofing

Technical Specs

SKU: UDL
Length: 66’
Width: 39-3/8″
SQ/Roll: 2
Thickness: 50 mils nominal

 

Testing Compliance

ASTM D4869
ASTM D4601
ASTM D226
ASTM D6757
ASTM E108
FBC Approval #14807
FBC Approval #15214

Shipping Specifications

SQ/Roll: 2
Rolls/Pallet: 30
Rolls/Truckload: 600

Documents & Resources

PDF Documents

Videos

Warranty Information

Warranty

Right Start™ UDL is eligible for expanded warranty coverages relative to its use as a single roofing accessory or in combination with others in a complete Malarkey roofing system. Installed separately, it carries a 10-year product warranty against manufacturing defects. Contact Malarkey’s Technical Services Department for details.

Warranties