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Specialty Underlayments

TAMKO TW Underlayment

Some roofing projects require underlayments designed specifically for extreme conditions.

When standard underlayments don’t meet your needs, look to TAMKO’s specialty roof underlayments.

Our Products

TW Underlayment

A self-adhering rubberized asphalt sheet membrane with a polymer film on the surface and a removable treated release film on the adhesive side. Surface is textured for skid resistance and can be left exposed for up to 120 days.
Product Details
Application Instructions
TW Underlayment Application Instructions
Data Sheets
TW Underlayment Data Sheet
Safety Data Sheet
 TW Underlayment SDS
Technical Product Information
Florida Building Code Approval
Brochures
Waterproofing Brochure
Limited Warranty and Arbitration Agreement
TAMKO Asphalt Underlayments Limited Warranty and Arbitration Agreement

WATERPROOFING PRODUCTS BEGIN TO AGE AS SOON AS THEY ARE EXPOSED TO NATURE, AND BUILDINGS EXPERIENCE AGING FACTORS DIFFERENTLY. BECAUSE IT IS DIFFICULT TO PREDICT HOW LONG WATERPROOFING PRODUCTS WILL LAST, TAMKO OFFERS A LIMITED WARRANTY THAT INCLUDES A BINDING ARBITRATION CLAUSE AND OTHER TERMS AND CONDITIONS WHICH ARE INCORPORATED HEREIN BY REFERENCE. YOU MAY OBTAIN A COPY OF THE LIMITED WARRANTY AT TAMKO.COM OR BY CALLING 1-800-641-4691.

IMPORTANT SAFETY INFORMATION: Use personal fall protection devices when working on a roof. Personal fall protection devices, safety glasses and hearing protection must always be used when applying this product. Moisture, frost or debris will decrease the traction when walking on this product. Applicator safety is of utmost importance.

TW Seam Tape

A flexible, self-adhering SBS modified bitumen roof deck seam tape with a polymer film on the surface and a removable treated release film on the adhesive side. For use as a roof deck seam tape to cover all joints and seams. Provides secondary protection against water penetration at deck seams and joints.
Product Details

WATERPROOFING PRODUCTS BEGIN TO AGE AS SOON AS THEY ARE EXPOSED TO NATURE, AND BUILDINGS EXPERIENCE AGING FACTORS DIFFERENTLY. BECAUSE IT IS DIFFICULT TO PREDICT HOW LONG WATERPROOFING PRODUCTS WILL LAST, TAMKO OFFERS A LIMITED WARRANTY THAT INCLUDES A BINDING ARBITRATION CLAUSE AND OTHER TERMS AND CONDITIONS WHICH ARE INCORPORATED HEREIN BY REFERENCE. YOU MAY OBTAIN A COPY OF THE LIMITED WARRANTY AT TAMKO.COM OR BY CALLING 1-800-641-4691.

IMPORTANT SAFETY INFORMATION: Use personal fall protection devices when working on a roof. Personal fall protection devices, safety glasses and hearing protection must always be used when applying this product. Moisture, frost or debris will decrease the traction when walking on this product. Applicator safety is of utmost importance.

TW Metal and Tile Underlayment

A fiberglass-reinforced self-adhering rubberized asphalt sheet membrane with a polymer film on the surface. Features a removable treated release film on the adhesive side for convenient installation and handling. TW Metal & Tile Underlayment can be left exposed for up to 120 days and is used under metal roofs, mechanically fastened tile, slate, wood shakes, asphalt and composite shingles.

Product Details

WATERPROOFING PRODUCTS BEGIN TO AGE AS SOON AS THEY ARE EXPOSED TO NATURE, AND BUILDINGS EXPERIENCE AGING FACTORS DIFFERENTLY. BECAUSE IT IS DIFFICULT TO PREDICT HOW LONG WATERPROOFING PRODUCTS WILL LAST, TAMKO OFFERS A LIMITED WARRANTY THAT INCLUDES A BINDING ARBITRATION CLAUSE AND OTHER TERMS AND CONDITIONS WHICH ARE INCORPORATED HEREIN BY REFERENCE. YOU MAY OBTAIN A COPY OF THE LIMITED WARRANTY AT TAMKO.COM OR BY CALLING 1-800-641-4691.

IMPORTANT SAFETY INFORMATION: Use personal fall protection devices when working on a roof. Personal fall protection devices, safety glasses and hearing protection must always be used when applying this product. Moisture, frost or debris will decrease the traction when walking on this product. Applicator safety is of utmost importance.

 

Frequently Asked Questions

What are specialty underlayments used for?

Specialty underlayments are designed for roofs that need enhanced protection beyond standard synthetic or felt options — such as metal or tile roofs exposed to high temperatures.

How do specialty underlayments differ from standard underlayments?

Specialty underlayments offer improved heat tolerance, adhesion strength, and durability. They are engineered for specific conditions where traditional products may not perform as effectively.

Can these underlayments be used under any roofing material?

Yes. TAMKO® specialty underlayments are compatible with most roof coverings, but they're especially recommended for metal and tile systems where heat and slope demand superior performance.†

Do TAMKO® underlayments come with a warranty?

Yes. TAMKO® underlayments may be covered under TAMKO's Limited Warranty. See tamko.com/limitedwarranties for complete details.

Are these underlayments self-adhering?

Yes. TAMKO® specialty underlayments feature a self-adhering backing that simplifies installation and helps ensure consistent adhesion across the roof deck.

† These discussions are intended for general informational purposes only and should not be considered professional advice regarding insurance, financing, legal matters, or business transactions. Readers are encouraged to consult with qualified professionals before making any decisions.