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Breather Membranes and Damp Proofing

The most common causes of persistent damp in buildings are rising damp, penetrating damp, surface condensation and condensation within the components or the surface of the components of fabric of the building. 

Damp in buildings can cause a number of serious problems, such as, mould growth, mildew, salts, staining and damp patches, damage to surface finishes, decay of the building and result in poor performance of insulation.

Breather membranes

Breather membranes are water resistant but air permeable. Their air-permeability allows the structure to be ventilated, avoiding the build-up of interstitial condensation. They are used within external wall and roof constructions, where the external cladding may not be completely water-tight or moisture resistant. The membrane is fixed on to the cold side of insulation and prevents moisture from penetrating further into the structure. The membrane's air-permeability allows the structure to be ventilated, avoiding the build-up of condensation. Breather membranes can also improve the thermal efficiency of a buildings external envelope. Any moisture that might form on the outside face of the membrane should be able to drain away.


Benefits

  • Highly permeable to water vapour,
  • Wind-tight,
  • Water resistant,
  • Enhances the airtightness of the construction,
  • Lightweight, flexible and easy to install, 
  • Can be fixed directly to sheathing, plywood, OSB, insulation or masonry, Durable and long life.

Damp proofing

Rising damp is caused by capillary action drawing moisture up through the porous elements of a building fabric -- walls, columns, foundation elements. Rising damp can be caused by the absence of a damp-proof course (DPC) or a damp-proof membrane (DPM) or by faults in their installation. The damp-proof course is a barrier, usually formed by a membrane built into the walls of a building -- not less than 150 mm above ground level -- to prevent damp rising through the walls.

A damp-proof course should be continuous with the damp-proof membrane in the floor, at least 150 mm above the level of the adjoining ground if it is in an external wall. And, if it is in an external cavity wall, the cavity should extend at least 225 mm below the damp-proof course, or a cavity tray should be provided with weep holes every 900 mm to prevent the water running down the cavity from passing to the inner leaf. A damp-proof course is required in the joints between walls and door and window frames and in suspended timber ground floors between the timber and materials that can carry moisture from the ground. The absence of a damp-proof course in older buildings can be rectified either by the insertion of a damp-proof course, or by the injection of water-repellent chemicals.


CHOOSE MANUFACTURERS or scroll down to see products (show)

Brand: Powerlon Model and Size: 2mm x 15mm x 24m
Delivery Time: 2 - 3 working days
Powerbond Double-Sided Butyl Tape - 2mm x 15mm x 24m Roll is a high-performance sealing tape used to provide effective air, vapour and watertight joins for Powerlon Membranes.CHARACTERISTICSTechnically advanced,Double-sided tape,Seals Powerlon VCLs, Self-adhesive.APPLICATIONUsed for j..
£7.45
£8.94 inc VAT
Powerlon Air Barrier Membrane - 1.5m x 50m roll
Guide Price
Brand: Powerlon Model and Size: 1.5m x 50m - 75m2
Delivery Time: 2 - 3 working days
Powerlon Air Barrier Membrane - 1.5m x 50m roll is a high-performance non-woven 112gsm membrane that will increase energy efficiency as it improves the air tightness in the building. This membrane is CE marked and certified for use in roofs, walls and floors. Powerlon Air Barrier is made f..
Guide Price: £79.22
£95.06 inc VAT
Brand: Powerlon Model and Size: 2m x 50m - 100m2
Delivery Time: 2 - 3 working days
Powerlon FlameOut Block Fire-Retardant Membrane is a high-performance breathable polyethylene-based fire-retardant vapour control layer with a mono-filament reinforcement scrim surface to provide excellent tensile strength. The fire-retardant has superior self-extinguishing and flame-retarding prope..
£95.98
£115.18 inc VAT
Brand: Powerlon Model and Size: 1.5m x 50m - 75m2
Delivery Time: 2 - 3 working days
Powerlon FlameOut Breathe Fire-Retardant Membrane is a high performance breathable fire-retardant membrane made from non-woven fabrics with superior self-extinguishing and flame-retarding properties. Flame retardant membranes are resistant to catching fire, reduce flammability, and inhibit, suppress..
£103.07
£123.68 inc VAT
Brand: Powerlon Model and Size: 1.5m x 25m - 37.5m2
Delivery Time: 2 - 3 working days
1.5m x 25m Powerlon Metalix Breathable Membrane is a high performance multilayer, breathable membrane with a 3-D top layer, specifically suitable for metal, zinc and copper roofs. The three-dimensional top layer ensures that the roof cladding can move in the event of temperature fluctuations. The Po..
Guide Price: £197.60
£237.12 inc VAT
Brand: Powerlon Model and Size: 1.6m x 100m - 160m2
Delivery Time: 2 - 3 working days
Powerlon SupaPerm SP100 Housewrap Breather Membrane is a high performance single-layer woven breathable fabric used for the protection of walls in timber frame structures and for profiled metal industrial roofs. The high density polyethylene fibres are bonded together with high pressure and heat to ..
Guide Price: £81.91
£98.29 inc VAT
Powerlon ThermaPerm Housewrap Termo-Reflective Breather Membrane - 1.5m x 100m Roll
Guide Price
Brand: Powerlon Model and Size: 1.5m x 100m - 150m2
Delivery Time: 2 - 3 working days
Powerlon ThermaPerm Housewrap Thermo-Reflective Breather Membrane is a high performance single-layer woven breathable fabric used for the protection of walls in timber frame structures and for profiled metal industrial roofs. The high density polyethylene fibres are bonded together with high pressur..
Guide Price: £231.09
£277.31 inc VAT
Powerlon UV 120 - UV Resistant Facade Membrane - 1.5m x 50m Roll - 120gsm
Guide Price
Brand: Powerlon Model and Size: 1.5m x 50m - 75m2
Delivery Time: 4 - 5 weeks
Powerlon UV 120 Membrane is a high-performance breathable water repellant UV resistant membrane for installations behind open or closed ventilated rainscreens and facade on walls. Made of polyacrylic and co-polymer materials, Powerlon UV 120 gives superior durability. The sun emits ultraviolet (UV) ..
Guide Price: £134.49
£161.39 inc VAT
Brand: Powerlon Model and Size: 15m x 60mm
Delivery Time: 2 - 3 working days
Powerlon UV Facade Tape - 60mm x 25m Roll is a high-performance facade tape that is technically advanced engineered with high UV resistance. It is highly UV resistant adhesive tape effectively joins Powerlon UV 120 and UV 160 membranes air and watertight.Note: Tapes should be kep..
Guide Price: £19.64
£23.57 inc VAT
Brand: Powerlon Model and Size: 10m x 50mm
Delivery Time: 2 - 3 working days
Powerlon UV Nail Sealing Tape - 50mm x 10m Roll is a high-performance UV resistant double-sided tape to secure adhesive seal over nails and screws. Used with Powerlon UV 160 SA and UV 120 roof membranes. CHARACTERISTICSTechnically advanced,Double-sided,Seals any punctures made by..
Guide Price: £6.83
£8.20 inc VAT
Brand: Powerlon Model and Size: 1.6m x 50m - 80m2
Delivery Time: 2 - 3 working days
Powerlon UltraBlock 200 - 1.6m x 50m roll is a high-performance reinforced polyethylene vapour control layer with a thermo-reflective layer which helps with the insulation of the building. These 104gsm thermo-reflective reinforced vapour control layers maximise energy efficiency of th..
Guide Price: £70.18
£84.22 inc VAT
Powerlon Ultraperm Lite 92gsm Breather Membrane 1.0m x 50m Roll
Guide Price
Brand: Powerlon Model and Size: 1.0m x 50m - 50m2
Delivery Time: 2 - 3 working days
Powerlon Ultraperm Lite 92gsm Breather Membrane is a high performance non-woven composite breathable underlays for all pitched roofs and timber frame wall applications. Powerlon Ultraperm Lite is tough, durable and tear resistant with exceptional water vapour permeability and water repellent charact..
Guide Price: £30.02
£36.02 inc VAT
Powerlon Ultraperm Max 155gsm Breather Membrane 1.0m x 50m Roll
Guide Price
Brand: Powerlon Model and Size: 1.0m x 50m - 50m2
Delivery Time: 2 - 3 working days
Powerlon Ultraperm Max 155gsm Breather Membrane is a high performance non-woven composite breathable underlays for all pitched roofs and timber frame wall applications. Powerlon Ultraperm Max is tough, durable and tear resistant with exceptional water vapour permeability and water repellent characte..
Guide Price: £59.81
£71.77 inc VAT
Brand: Powerlon Model and Size: 1.0m x 50m - 50m2
Delivery Time: 2 - 3 working days
Powerlon Ultraperm Premium 135gsm Breather Membrane is a high performance non-woven composite breathable underlays for all pitched roofs and timber frame wall applications. Powerlon Ultraperm Premium is tough, durable and tear resistant with exceptional water vapour permeability and water repellent ..
Guide Price: £49.40
£59.28 inc VAT
Powerlon Ultraperm Standard 115gsm Breather Membrane 1.0m x 25m Roll
Guide Price
Brand: Powerlon Model and Size: 1.0m x 25m - 25m2
Delivery Time: Out Of Stock
Powerlon Ultraperm Standard 115gsm Breather Membrane is a high performance non-woven composite breathable underlays for all pitched roofs and timber frame wall applications. Powerlon Ultraperm Standard is tough, durable and tear resistant with exceptional water vapour permeability and water repellen..
Guide Price: £18.94
£22.73 inc VAT
Powerlon VCL 170 - Vapour Control Layer - 2m x 50m roll - 210gsm
Guide Price
Brand: Powerlon Model and Size: 2m x 50m - 100m2
Delivery Time: 2 - 3 weeks
Powerlon VCL 170 - 2m x 50m roll is a high-performance polyethylene-based vapour control layer with a mono-filament reinforcement scrim for tensile strength to protect the building envelop.  This 210gsm membrane will ensure that the building envelope is properly sealed to control vent..
Guide Price: £93.27
£111.92 inc VAT
Brand: Foliarex Model and Size: 1.5m x 50m
Delivery Time: 1 - 2 days
Strotex V 135GSM Breather Membrane is an air tight, vapour permeable, lightweight breather membrane for fully supported and unsupported installations in roofs and also for walls as a wind-proof material. It is a high performance breather membrane, consists of 3 layers to achieve a high vapour permea..
£55.00
£66.00 inc VAT
Brand: Foliarex Model and Size: 1.5m x 50m - 4125m2
Delivery Time: 7 - 10 days
Strotex V 135GSM Breather Membrane is an air tight, vapour permeable, lightweight breather membrane for fully supported and unsupported installations in roofs and also for walls as a wind-proof material. It is a high performance breather membrane, consists of 3 layers to achieve a high vapour permea..
£2,406.25
£2,887.50 inc VAT
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