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MB Technology Layfast SBS TU-70 Steep Slope Roofing Underlayment Roll
Regular price $108.75Orders start at $399 — combine any items to reach the minimum. Learn more
MB Technology Layfast SBS TU-70 Steep Slope Roofing Underlayment Roll
MB Technology Layfast SBS TU-70 is an SBS modified asphalt underlayment for steep slope roofing, sold by the roll. It is installed beneath shingles, tile, or metal as part of the roofing deck protection layers. One roll unit is supplied per order.
Key Features:
- SBS modified: SBS-modified asphalt underlayment designed for steep slope applications.
- TU-70 grade: Manufactured as the TU-70 grade in the Layfast line.
- Steep slope use: Intended for use under steep slope roof coverings.
- Roll format: Supplied as a roll for efficient coverage of roof decks.
- Deck protection: Serves as a water-resistive layer beneath the primary roof covering.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | MB Technologies |
| Sell unit | 1 roll |
| Product line | MB Technology Layfast |
| Material | SBS modified asphalt underlayment |
| Intended use | Steep slope roofing underlayment beneath shingles or other roof coverings |
Coverage & How Much You Need:
Roll coverage depends on the stated roll size, which is not provided in the sources; consult the manufacturer's product data for square feet per roll. Plan laps and head laps into your coverage calculation.
Fit and Compatibility:
Use beneath compatible steep slope coverings such as shingles, metal, or tile. As with any underlayment, follow the roof covering manufacturer's requirements for underlayment type and attachment.
Frequently Asked Questions (FAQ):
Q: What is included?
A: One roll of MB Technology Layfast SBS TU-70 underlayment.
Q: Where is this used?
A: As an underlayment layer on steep slope roofs, beneath the primary roof covering.
Q: How much does one roll cover?
A: Roll coverage is not stated in the available specifications; check the manufacturer's product data sheet.
Q: Can it be used under metal roofing?
A: It is a steep slope underlayment, but confirm underlayment requirements with the roof covering manufacturer before installing.
Q: Is it self-adhered?
A: Self-adhesion is not stated in the sources; verify attachment method with the product data sheet.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
SBS modified underlayments like this TU-70 grade are typically chosen for added flexibility and toughness on steep slope decks compared to plain asphalt felts. Always dry-in the roof fully before setting the finished covering, and keep laps shingle-fashion so water sheds down-slope. Match the underlayment to the covering manufacturer's spec to keep the roof system warranty intact.
Underlayment surfaces can be slippery, especially when damp or dusty; wear appropriate footwear and use fall protection on the roof.
Order MB Technology Layfast SBS TU-70 underlayment by the roll for your steep slope roof project.
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