Roofing underlays and tapes

Complete guide to long-lasting roof protection

Category "Roofing underlays and tapes" brings together specialised materials designed to protect the roof structure, improve weather resistance and ensure airtightness. In this section, you'll find breathable and non-breathable underlay membranes, self-adhesive and seam-sealing tapes, eaves and ridge tapes, vapour control layers, and accessory products that simplify installation. These items are essential for both new builds and roof renovations, helping to prolong the service life of roofing materials while maintaining indoor comfort.

Types and variants of products

Understanding the product range helps choose the right solution for a project. Typical variants include:

• Underlay membranes

  Breathable (vapour-permeable) membranes for timber roofs; non-breathable underlays for cold roofs or as temporary weather protection.

• Self-adhesive and sealing tapes

  Tapes for lap sealing, flashing, and repairing membrane tears—available in single-sided and double-sided adhesive types.

• Vapour control layers (VCL)

  Materials with low SD-values to control indoor moisture movement and prevent condensation inside the roof build-up.

• Specialist tapes and accessories

  Butyl, bitumen, and polymer tapes for chimney, valley, and ridge detailing; corner seals and primer-compatible products for durable adhesion.

Where these products are used

Roofing underlays and tapes are applied across a wide range of roofing tasks:

• Under tile and slate roofs to provide secondary weather protection.
• Under metal and composite roofing to improve weathertightness and reduce noise.
• At roof junctions, penetrations, and eaves to ensure continuous sealing.
• During renovation works as temporary protection is used when removing existing coverings.
• In ventilated and non-ventilated roof systems, where moisture control is required.

How to choose the right underlay or tape

Make decisions based on performance, compatibility, and installation conditions:

• Check breathability: choose a vapour-permeable membrane for cold pitched roofs and a VCL for warm roofs.
• Assess weather and UV exposure: select UV-stable products for prolonged outdoor exposure.
• Match adhesives: ensure tapes are compatible with the membrane and roof substrate.
• Look for certifications: CE marking, EN standards, and manufacturer performance data ensure reliability.
• Consider ease of installation: self-adhesive tapes and pre-formed accessories speed up onsite work and reduce errors.

Advantages of buying from our online store

Purchasing "Roofing underlays and tapes" from our online shop offers practical benefits for builders and homeowners alike:

• Wide selection of branded and budget options to suit different project requirements.
• Detailed product specifications, datasheets, and installation guidance are available for every item.
• Fast delivery, bulk-packing options, and the ability to compare technical features side-by-side.
• Professional support from experienced staff to help match materials to your roof design.
• Secure ordering, clear return policies, and transparent pricing that help plan project costs.