Accessory

Secure Start® SG

Our Most Economical Underlayment

Secure Start® SG (smooth grade) is a lightweight, synthetic underlayment providing a layer of moisture protection over the entire roof, and suitable for use with asphalt shingles, as well as under roof tile and metal.

 

Its smooth surfaces, top and bottom, lessen shingle drag and increase installation speed.

Underlayment for Shingle Roofs

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

 

As the name implies, underlayment sits under the shingle and provides a vapor barrier covering the entire roof.

 

Malarkey offers three underlayments tailored to asphalt shingle roofs. Secure Start® SG is our most economical.

Three Underlayment Options for Shingles.

Moisture Barrier

Made from recyclable polymerized polyolefin, in four unique layers, Secure Start® SG is a synthetic, 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.

Smooth for Speed

The SG in Secure Start® SG stands for Smooth Grade, aptly named because the surface of this underlayment is smooth, so shingles easily glide across the top, aiding installation speed.

Installed Second

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

Key Features

Mechanically Fastened

Sheets are applied with 1″ diameter plastic cap fasteners.

Strong & Durable

4 plies, with a synthetic polyolefin reinforcement layer, provides greater tear strength than conventional felt paper underlayment for exceptional durability.

4 Layer Construction

  1. Bottom waterproofing layer for quick placement
  2. Woven membrane for tear strength
  3. Additional waterproofing Layer
  4. Non-Woven, UV Stable Walkable Surface

Water Resistant

Non-porous monolithic layer of polypropylene helps resist water penetration.

Faster Installation

Synthetic membrane is up to 3X lighter than conventional felt paper to help improve product handling and installation speed.

Safer Installation

High tear strength and embossed surface design help prevent accidents by providing an anti-skid surface for workers, and keeps roofing materials from sliding.

Sustainable

Made from recyclable polypropylene that be re-used for new product production at the end of its lifecycle.

Wrinkle Resistant

Lays down flat and does not wrinkle when moist or wet.

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

  Deck Grip Slip Resistance Tear Strength* Permeability UV Stability Recyclable
Good Secure Start® SG
Moderate Enhanced Exceptional No 180 days 100%
Enhanced Enhanced Exceptional No 180 days 100%
Enhanced Enhanced Exceptional Yes 180 days 100%
 
Good
Deck Grip

Moderate

Enhanced

Enhanced

Slip Resistance

Enhanced

Enhanced

Enhanced

Tear Strength*

Exceptional

Exceptional

Exceptional

Permeability

No

No

Yes

UV Stability

180 days

180 days

180 days

Recyclable

100%

100%

100%

1030 Secure Start SG

Malarkey Roofing Products Roll Roofing

1030 Secure Start SG Label

Malarkey Roofing Products Roll Roofing

Technical Specs

SKU: 1030
L: 250’
W: 48″
SQ/Roll: 10
Thickness: 11 mils nominal

 

Testing Compliance

ICC-ES AC188
ASTM D226
ASTM D4869
ASTM E108 Class A
Intertek CCRR-1082
CAN/CSA A123.3
FBC Approval
 – FL23186.
 

Shipping Specifications

SQ/Roll: 10
Rolls/Pallet: 49
Rolls/Truckload: 1764

PDF Documents

Videos

Warranty

1030 Secure Start® SG 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

  Deck Grip Slip Resistance Tear Strength* Permeability UV Stability Recyclable
Good Secure Start® SG
Moderate Enhanced Exceptional No 180 days 100%
Enhanced Enhanced Exceptional No 180 days 100%
Enhanced Enhanced Exceptional Yes 180 days 100%
 
Good
Deck Grip

Moderate

Enhanced

Enhanced

Slip Resistance

Enhanced

Enhanced

Enhanced

Tear Strength*

Exceptional

Exceptional

Exceptional

Permeability

No

No

Yes

UV Stability

180 days

180 days

180 days

Recyclable

100%

100%

100%

Specifications & Testing

1030 Secure Start SG

Malarkey Roofing Products Roll Roofing

1030 Secure Start SG Label

Malarkey Roofing Products Roll Roofing

Technical Specs

SKU: 1030
L: 250’
W: 48″
SQ/Roll: 10
Thickness: 11 mils nominal

 

Testing Compliance

ICC-ES AC188
ASTM D226
ASTM D4869
ASTM E108 Class A
Intertek CCRR-1082
CAN/CSA A123.3
FBC Approval
 – FL23186.
 

Shipping Specifications

SQ/Roll: 10
Rolls/Pallet: 49
Rolls/Truckload: 1764

Documents & Resources

PDF Documents

Videos

Warranty Information

Warranty

1030 Secure Start® SG 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