Nationwide Delivery

Knowledgeable Staff

Outstanding Service

Secure payments

Powerlon UltraPerm Max Roof Breathable Membrane


£80.10 Incl. VAT
£66.75 Ex. VAT

Pay in 3 interest free payments with PayPal on checkout. Choose PayPal at checkout. Learn more
Estimated Delivery: 2-3 working days 


The Powerlon UltraPerm Max is a high-performance breathable membrane with impressive vapour permeability. Part of the UltraPerm range, the versatile UltraPerm Max can be used in all pitched roofs, walls, and timber frame structures. It is suited to both cold and warm roofs and can be installed in supported and unsupported, ventilated and unventilated roofs. If you’re looking for a quality and cost-effective breather wall and breathable roofing membrane solution, then the Powerlon UltraPerm range could be for you.

The UltraPerm Max’s high tensile material is strong and durable, offering impressive tear resistance. At 155 grams per meter squared, the BBA and CE certified UltraPerm Max premium underlay is the highest grade in the UltraPerm range. Lightweight and easy to handle, the UltraPerm Max comes pre-printed with handy marking lines for effortless on-site cutting and installation. Roofing Supplies are pleased to offer the Powerlon UltraPerm Max in two different sizes, simply select the option that suits your breathable roofing membrane needs from the dropdown box.

Why Choose this Powerlon UltraPerm Max Breathable Membrane?

  • Designed for pitched roofs and walls in timber frame structures
  • Highly vapour permeable
  • Suitable for cold & warm pitched roofs
  • Strong & durable
  • Extremely water resistant
  • BBA/CE marked

Product Specifications:

Size: 1m x 50m / 1.5m x 50m (select from dropdown)

Colour: Green

Nominal Weight: 155 g/m²

Roll Weight: 8.3kg – 1m / 12.2kg – 1.5m

Tensile Strength (MD / XD):  320 / 200 N/50mm

Resistance to Tearing (MD / XD): 140 / 230 N

Resistance to Water Penetration: W1 Class

Water Vapour Transmission:  Sd 0.02m

Temperature Range: -40°C – +70°C

Flame Resistance: E Class

UV Resistance: 3 months

Deliveries are made on the basis the customer can accept the goods, or willingness to off load the goods, or having means of mechanical offload, this also applies to heavier items such as pallets etc. All deliveries are made ‘kerbside’ and often it can be at the discretion of the driver. A large majority of deliveries would be made on a large rigid tail-lift vehicle and off loaded via a pallet truck and only on to flat surfaces such as tarmac, concrete and pavers. If you do have restricted access, please contact us prior to placing your order. We will always try to accommodate your needs. If a delivery fails due to access, we reserve the right to make a re-delivery charge. All delivery charges are calculated when checking out. The delivery charges included are for the Mainland UK only and do not apply to the Scottish Highlands, or Isles off the Mainland. Additional charges may apply for deliveries that aren’t classed within the Mainland (this is classed by ourselves, suppliers and couriers) Please contact us on 01752 466151 or Due to the nature of our business model, this can mean your order will be sent via multiple deliveries. Whilst we will make every effort to deliver your goods within the stated/requested time frame, we cannot guarantee availability from the manufacturer or the manufacturer's delivery schedules, so we would recommend the end user not to start/schedule any work until the goods arrive. Due to logistics of various couriers and suppliers we are unable to give times of deliveries. However, please call or email us on the day of the delivery and we will try to get an approximate time. Deliveries can take place from as earlier as 07:30 right up to 18:00 depending on the courier/haulier and taking into account local traffic etc.
You have 14 days from receiving your item(s) to return them should you wish to do so. Please contact us should you wish to arrange a refund/return. Any product marked cut to size, bespoke or made to order are non returnable and excluded from our refund policy.

Have a Question?

Be the first to ask a question about this.

Ask a Question

Payment & Security

Apple Pay Google Pay Maestro Mastercard PayPal Shop Pay Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.