Backed by the manufacturers of proven TYPAR Weather Protection System barriers, TYPAR Surround SR Underlayment is one more component in the line of defense against the elements.

Surround your home with protection.

The roofing deck is the area that supports the actual roofing material, and protecting it from moisture is key to assuring the lifespan of the roof and the long-term durability of the home.

Whether your roof is covered with shingles, shakes, tile, slate or metal, be sure it’s protected with SURROUND SR Underlayment. A smart alternative to felt, it is water’s toughest opponent, creating a secondary water barrier that reduces the incidence of leaks caused by storm damage, wind-driven rain, ice dams and worn roofing materials. It is a waterproof, synthetic polymer material that will protect your homes against moisture intrusion.

Start protecting your home at the top with Surround SR Underlayment.

In addition to superior weather protection, SURROUND SR Underlayment offers five key advantages:

  • Stronger - 10 times stronger than 30# felt for the ultimate tear resistance, so it will not blow off during installation and helps eliminate the need for costly roof repair.
  • Drier - the unique slip-resistant surface is waterproof to prevent moisture issues.
  • Lighter - up to 10 times lighter than 30# felt so it's easy to carry onto a roof.
  • Faster - in addition to having five times more underlayment per roll than felt, the rolls are also 25 percent wider for quicker roof deck coverage.
  • Secure - SURROUND SR Underlayment meets the more stringent requirements of ICC AC48-Acceptance Criteria for Roof Underlayment for Use in Severe Climate Areas.

For Residential / Light Commercial Applications - Typical Characteristics

Roll specifications:

Pallet information:
Rolls per pallet
Pallet Weight
Pallet dimensions
45.25 inches
26 lbs
10 sq

965 lbs
48” x 48” x 45.25”
Class A Burning Brand and Intermittent Flame (ASTM E-108) Pass
Nail Sealability (ASTM D-1970) Pass
Pliability (AC-48) sec 4.3 Machine Direction – Pass
Cross Direction - Pass
Water Ponding (AC-48) sec 4.3 Control – Pass
Accelerated Aging - Pass
Accelerated Aging (AC-48) sec 4.3 Pass
UV Exposure (AC-48) sec 4.3 Pass
Moisture Vapour Transmission (ASTM E-96) Desiccant Method 0.4 perms
Tensile Strength (UV Exposed) (ASTM D-1682-64) 1975 Machine Direction – 112
Cross Direction - 126
Tensile Strength (Accelerated Aged) (ASTM D-1682-64) 1975 Machine Direction – 109
Cross Direction - 128
Weight per square (ASTM D-5261) 2.6 lbs/100ft2

The information contained herein is to the best of our knowledge accurate and reliable and is provided for the user’s assessment and verification. However, since the circumstances and conditions under which such information and the products discussed can be used may vary and are beyond our control, we make no warranty, expressed or implied, of merchantability, fitness or otherwise, or of the results to be obtained, or against patent infringement, and we disclaim all liability from any resulting damage or loss.