From £369.48 + VAT per 30m x 1.5m roll

Weldable breathable roofing membrane – Ampatop Seal – 1.5m x 30m

Ampatop Seal weldable breathable roofing membrane is:-

  • an extremely robust, double sided, heat or solvent weldable, breathable roofing membrane.
  • suitable for roof pitches down to 5°, enabling very low pitch slate or tile roofs.
  • a great way to enable breathable, flat roof constructions.
  • anti-slip and suitable for up to 3 months weather exposure.
  • guaranteed for 10 years.

Product overview

Where is it used?

  • Ampatop Seal is used on very shallow pitch roofs over wood fibre sarking boards, down to 5° pitch to ensure a fully watertight, breathable seal is formed.
  • This product can also be used down to a 10° pitch without any sarking board support.

How is it used?

  • Ampatop Seal weldable breathable membrane is designed to be used in very low pitch (flat) roof structures.
  • All joints should overlap by at least 100mm and all joints must be welded with Ampacoll LiquiSeal adhesive.
  • Roof pitches between 5° and 10° must use a sarking board to support the membrane and prevent pooling.
  • For full details on how to install this membrane please download the installation guide.

How much will you need?

Each roll of Ampatop Seal breathable membrane is 30m long and 1.5m wide. It covers an area of 45m2 including overlaps.

Frequently asked questions

Do I need to tape the joints?

All the laps must be sealed but this would be with either the solvent welding glue or by heat welding the laps

How long can I leave it exposed?

This membrane is very UV stable and can withstand up to 3 months of weathering without deterioration. Beyond this the sun can begin to degrade the strength and weather resistance of the membrane.

Pricing & shipping

This product is on a 1.5m long roll and will be sent by courier, costing around £20 + VAT

Roll length [m]Roll width [m]Roll Area [m²]Membrane weight [g/m²]Roll weight [kg]Sd value [m]Single roll cost [£]5+ rolls [each]

Book your free project consultation

We’d like to hear from you. Call us on 01392 861763 or email us at with any questions or comments.

If you can’t seem to find what you need on our website or you have large quantities of materials to purchase please contact us for a chat and we’ll offer you a more bespoke solution.

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