Skip to main content

Roofing Underlay

The layer the roof depends on

A roof is only as reliable as what sits beneath it. TecPac synthetic roofing underlayment forms a strong, water-resistant barrier under shingles, metal, or tile, engineered to stay stable in heat, resist mould, and hold up through extended UV exposure when the schedule slips.

Stronger than felt,
in every condition that matters

Traditional felt wrinkles, absorbs moisture, and degrades the moment a project runs long. Our synthetic underlayment does none of that. Its lightweight, tear-resistant construction speeds up installation and improves on-roof safety, while a glossy surface finish provides controlled friction for safer handling at height.

The result is a cleaner, stronger, and more reliable roofing system,
built to perform in any climate and engineered for applications where moisture control, structural stability, and extreme-temperature performance are critical.

Weatherproof

UV-Resistance

Tear Resistant

Mould Resistant

Controlled Friction

Custom Print

Roofing Underlay

On Rolls

HDPE-woven protection for shingle, metal and tile roofs.
    Roofing Underlay

    Four layers between the roof and the weather

    Wind-driven rain, weeks of UV exposure before the covering goes on, and heat build-up under dark surfaces. Each layer answers one of them.

    Glossy surface coating

    1
    Provides controlled friction for safer handling during high elevation installation.

    Glossy surface coating

    1
    Provides controlled friction for safer handling during high elevation installation.

    HDPE woven reinforcement

    2
    High-strength core delivering exceptional tear resistance and long-term durability.

    Dual-sided
    polyolefin coating

    3
    Full all-weather protection, waterproofing and enhanced longevity.

    HDPE woven reinforcement

    2
    High-strength core delivering exceptional tear resistance and long-term durability.

    Dual-sided
    polyolefin coating

    3
    Full all-weather protection, waterproofing and enhanced longevity.

    Non woven fabric

    4
    Encloses the high-strength core.

    Non woven fabric

    4
    Encloses the high-strength core.

    Sustainability in Protection

    100% recyclable materials (code 07), supporting sustainable construction and a reduced environmental impact.
    Download „Position on Plastics“ Flyer

    Technical Specifications

    Material Data

    • Material: HDPE
    • Reinforcement weave: 8x8 ppi
    • Coating: Clear PE lamination with nonwoven fabric plus glossy surface coating
    • Weight: 140 g/m² +/- 5%
    • Thickness: 0.18 mm
    • Maximum width: Up to 3.81m
    • Fire retardant: Class F
    • Printing: Up to four-colour, customer-designed
      pattern printing.

      • Detailed specifications and Technical Datasheets (TDS) available on request.

    • Technical Specifications
    FAQ's

    Frequently asked Questions

    What is your Minimum Order Quantity (MOQ)?
    Our MOQ varies depending on your needs. For unprinted material that we hold in stock, the MOQ starts from one roll. For custom‑made products with customer logo, the MOQ is usually around 20,000 linear meters. Please ask for more details.
    What is your lead time?
    For items we hold in stock in Europe, lead times are typically 2–10 working days. For custom‑made products shipped directly from our production sites, lead times start at approximately 6 weeks. In addition to stockholding, we operate a near/far supply chain model that allows us to meet urgent requirements, ensure on‑time deliveries, and significantly reduce overall lead times.
    Can you provide custom-made packaging solutions?
    Yes. We offer tailor-made packaging solutions, including customized dimensions, materials, and printing. Our goal is to offer abd develop packaging that fits your products and production requirements perfectly.
    Are your products PPWR‑compliant?
    Yes. Our packaging solutions are designed to meet PPWR’s recyclability and material standards. We continuously monitor regulatory updates to ensure ongoing compliance.
    Are your products recyclable?
    Yes — 100% recyclable. All our products are made from materials that can be fully reprocessed within existing recycling streams, ensuring minimal environmental impact.
    Industries

    Tailored Solutions for your Operation

    We understand the specific challenges of your supply chain

    Shingle, Metal & Tile Roofing

    A water-resistant barrier beneath every common roof build-up.

    Extended Exposure

    Engineered to withstand prolonged UV exposure during construction, keeping projects on track when schedules shift.

    Extreme Temperatures

    Stays stable in heat where felt wrinkles and absorbs moisture.

      Get in touch

      Rooted in nature. Ready to help.

      Forget Back-Office. Meet our dedicated Customer Care team.
      We provide personal support in English, German, Finnish, Swedish, and French.
      Meet our team

      Engineered to protect – Explore the rest of our range

      Products

      Debris Netting

      Scaffolding Sheeting

      Flooring Protection

      Staples & Staple Guns

      Biomass Cover

      Metal Wrap

      Lumber Wrap