UnderRoof™ HT High-Temperature Leak Barrier

Now, Protect Your Metal, Shingle, Or Tile Roof (See Details) Compound Rated for 260°F. Application under copper and zinc in some geographic areas may exceed these temperature extremes. Contact GAF Technical Services at 1-800-766-3411 for information with copper and zinc roof coverings.
With A Waterproof Leak Barrier

Whether your installer uses a leak barrier to waterproof just the vulnerable areas of your roof or you upgrade your protection for full deck waterproofing coverage (See Details) See limited warranty for this product for complete coverage and restrictions. , choosing the wrong product for an application can have disastrous effects.

Different roof coverings have different needs:

• Metal Roofs: Leak barriers for metal roofs require a high-temperature (minimum 250°F) compound—or they may drip or leach residue onto your siding or patio.
   
• Tile Roofs: Leak barriers for tile roofs should undergo special "stack testing" to be sure loaded tiles don’t slide off the roof during application. Also, if tiles are to be adhered in foam, the leak barrier should be tested to assure compatibility and adhesion.
   
• Asphalt Shingles: While asphalt shingles are a more forgiving roof covering than tile or metal, isn’t it important to know that the installers working on your home are safer, because the leak barrier they are using has a premium slip-resistant surface?

UnderRoof™ HT leak barrier is a key ­part of the Lifetime Roofing System, and has even earned the prestigious Good Housekeeping Seal. (See Details) The GAF Lifetime Roofing System has earned the prestigious Good Housekeeping Seal, which means that Good Housekeeping stands behind the products in this system. (Refer to Good Housekeeping Magazine for its consumer protection policy.)

Don’t Put Your Home At Risk

• Northern (and now many southern) climates recommend or require... (See Details) Check local building codes for specifications in your area.

  The use of leak barriers where ice dams are present, or as a secondary roof covering in the event of a catastrophic storm
  
  

• Don't jeopardize your insurance coverage…

  Be sure your installer complies with local code requirements- (See Details) Check local building codes for specifications in your area. or elect an upgrade to full deck coverage (See Details) Always be sure to install full ventilation when electing full deck leak barrier coverage. to protect against the unexpected
  
  

• Extraordinary protection…

  Available for tile and metal roof systems with Blue Diamond Guarantee coverage
  
  

Property Owner's Best Choice

• Versatile...

  Performs under metal, tile, and asphalt shingle roof coverings, (See Details) Compound Rated for 260°F. Application under copper and zinc in some geographic areas may exceed these temperature extremes. Contact GAF Technical Services at 1-800-766-3411 for information with copper and zinc roof coverings. so no matter what you choose to install, you're protected!
  
  

• Reliable...

  Can be exposed for up to 180 days prior to the application of a roof covering when necessary
  
  

• Peace Of Mind...

  Up to a Lifetime ltd. warranty when used on Lifetime Shingle roofs, (See Details) See GAF Shingle & Accessory Ltd. Warranty for complete coverage and restrictions. The word "Lifetime" means as long as the original individual owner of a single family detached residence (or the second owner in certain circumstances) owns the property where the shingles and accessories are installed. For owners/structures not meeting above criteria, Lifetime coverage is not applicable. Lifetime ltd. warranty on accessories requires the use of at least three qualifying GAF accessories and the use of Lifetime Shingles.
  
  Click for details. up to a 25-year ltd. warranty when used on non-Lifetime Shingle roofs, and up to a 10-year ltd. warranty when used with other approved roof coverings. (See Details) See limited warranty for this product for complete coverage and restrictions. Contact GAF Technical Services at 1-800-ROOF-411 or visit www.gaf.com for acceptable non-asphaltic roofing systems and limited warranty coverage. Commercial-grade warranty coverage (See Details) See Blue Diamond Guarantee for specific warranty coverage. available under metal and tile as well!
  
  

Professional’s Best Choice

• Enhanced Walkability…

  Features a specially formulated polyester reinforced mat
  
  

• Tough Commercial-Grade Quality…

  Acceptable for use in system sales for both residential and commercial applications. High-temperature compound rated to 260°F. UnderRoof™ HT Leak Barrier is an excellent vapor retarder, with a vapor permeance of .05 (based on internal testing)
  
  

• Convenient…

  One product for almost any roof covering, (See Details) Compound Rated for 260°F. Application under copper and zinc in some geographic areas may exceed these temperature extremes. Contact GAF Technical Services at 1-800-766-3411 for information with copper and zinc roof coverings. keep it in your shop ready for the next job
  
  

• Dependable…

  Seals around nails and exceeds the performance requirements of ASTM D1970, the industry standard for leak barrier performance
  
  

• Extremely Durable…

  Can be left exposed for up to 180 days when necessary
  
  
  

Specifications

UnderRoof^™ HT Leak Barrier EXCEEDS the following requirements of ASTM D1970

Property	Method	Requirement
Thickness (mils)	D5147	Min. 40
Tensile strength MD (lbf/in)	D2523	Min. 25
Tensile strength CMD (lbf/in)	D2523	Min. 25
Elongation at break, modified bitumen Portion – MD and CMD (%)	D2523	Min. 10
Adhesion to plywood at 75°F (lbf/ft-width)	D903	Min. 12
Adhesion to plywood at 40°F (lbf/ft-width)	D903	Min. 2
Thermal stability (mm)	D1204	Max. 3
Low temperature flexibility ( –20°F)	D1970	Pass
Tear resistance MD (lbf)	D4073	Min. 20
Tear resistance CMD (lbf)	D4073	Min. 20
Moisture vapor permeance (U.S. Perms)	E96 A	Max 0.1
Sealability around nail	D1970	Pass
Waterproof integrity after low temperature flexibility	D1970	Pass
Waterproof integrity of lap seam	D1970	Pass

Product Specifications (Nominal) Specification 2.0 Square Roll Roll length 61 ft (18.6 m) Roll width 39.4 in  (1 m) Sq. feet per roll 200 sq ft (18.6 sq m)

Applicable Standards ICC pending Meets the performance criteria of ASTM D1970 Florida Building Code approved UL Classified. See complete marking on product

Note: See application instructions for complete information

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