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  • Exoperm Mono Duro A2  External Breather Membrane
  • Exoperm Mono Duro A2  External Breather Membrane

Exoperm Mono Duro A2- External Breather Membrane - 75 Sqm

Rated 5.0 by 1 Happy Customer
(incl VAT) £1417.73
(excl VAT) £1181.44
Estimated Delivery Date Feb 20, 2026 - Feb 25, 2026
No deliveries on weekends or holidays.
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Exoperm Mono Duro A2 is a next-generation fire-rated monolithic breather membrane engineered to provide the highest standard of safety and thermal performance for the building envelope. Developed by Partel, this diffusion permeable membrane is specifically designed for use on the cold side of insulation in both façade wall and roof applications.

Unlike standard micro-porous membranes that rely on small pores which have a tendency to block over time, Exoperm Mono Duro A2 features a monolithic functional layer. This diffusion permeable polyurethane membrane actively manages moisture by transporting vapour through a solid-state chemical diffusion process, ensuring the structure remains dry and energy-efficient.


Key Features

  • Superior Fire Performance: Boasting a reaction to fire classification of A2-s1, d0 per EN 13501-1, it is a breather membrane of limited combustibility suitable for high-rise and high-risk buildings.
  • Monolithic Technology: Its monolithic functional layer provides a waterproof membrane that actively expels moisture while remaining completely airtight, unlike traditional membranes that rely on small pores.
  • Vapour Management: It is highly vapour-permeable and vapour open with an sd value optimised for maximum diffusion permeability, ensuring excellent moisture control.
  • Durability: Tested to BS EN standards, it ensures resistance to water penetration and maintains a low air permeability value to create a complete wind-tight building skin.
  • High Strength: As a 2-ply sarking and external breather membrane, it offers the robust mechanical strength required for demanding construction sites.

Applications

Exoperm Mono Duro A2 is a versatile external breather membrane designed for high-performance building envelopes. Its A2 rating makes it the definitive choice for:

  • High-Rise Constructions
  • Façade Systems
  • Roofing
  • Energy-Efficient Retrofits and Newbuilds
  • Timber and steel framed constructions, metal frame constructions.
  • Offsite construction
  • Exoprem Mono Duro A2 breather membrane is 1.5M wide, 50M long and covers 75 Sqm
  • It is a limited combustible, diffusion permeable monolithic breather membrane for high fire protection of the building envelope.
  • Suitable for high-rise constructions per current Building Regulations.
  • This external breather membrane is independently tested to EN 13501-1 for compliance
  • It is designed for use on the cold side of insulation on façade wall and roof applications,
Product Type   External Breather Membrane
Product Code  Exoperm Mono Duro A2
Brand  Partel
Length  50M
Width  1.5M
Coverage  75 Sqm
Material  Glass Fibre, Polyurethane
Weight  225 g/m²
Sd Value  0.09 m
Reaction to Fire  A2-s1, d0
Water Vapour Resistance  W2
Colour  Black

 

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Delivery Terms
Order Value (Excluding VAT)  Delivery Condition
Orders below £620  £35 
Orders between  £620-  £1230  £30
Orders between  £1231-  £2460  £28
Orders Above £2460  Free Delivery

Cancellations, Returns And Refunds:

  • You are free to cancel your order before we send you an order confirmation email with an estimated delivery date, and get a full refund
  • Once the order is confirmed and an estimated delivery date is issued via email, Orders cannot be cancelled. 
  • Incorrectly ordered doods can be returned within 14 days of delivery at our discretion. The customer is responsible for ensuring the goods are returned back to the address provided, in good condition where they will be inspected prior to processing any refunds. Restocking fee may be applied
  • For incorrect, damaged or faulty products, please contact us immediately after you receive delivery and we will assist accordingly.

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Delivery Terms
Order Value (Excluding VAT)  Delivery Condition
Orders below £620  £35 
Orders between  £620-  £1230  £30
Orders between  £1231-  £2460  £28
Orders Above £2460  Free Delivery

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