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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

Brand: Toughsheet Model and Size: DPC100/500 Free Delivery
Delivery Time: 1 - 2 days
100mm Damp Proof Course (DPC) provides damp proof protection, preventing ingress of external moisture. Suitable for brick, block, stone or concrete walls. Suitable for brick, block, stone or concrete walls. Withstands a compressive load of up to 2.5 N/mm2.  Will not crack under low tempera..
£21.23
£25.48 inc VAT
Brand: Toughsheet Model and Size: 4m x 25m -100m2
Delivery Time: 2 - 3 working days
Damp Proof Membrane is manufactured from high quality reprocessed low density polyethylene. It has successfully prevented moisture penetration from floors for many years. These systems which continuously monitor key performance criteria, along with a strict selective raw material policy ensures a co..
£52.75
£63.30 inc VAT
Brand: DuPont Tyvek Model and Size: 1.5x50m - 75m2
Delivery Time: 1 - 2 days
DuPont AirGuard Control Roll is a specially designed 1,5 x 50m air leakage barrier and vapour control layer (AVCL) with the main purpose of improving thermal performance of wall, roofs and ceilings by controlling and reducing air leakage and mostly convective heat loss through poorly insulated const..
£147.88
£177.46 inc VAT
Brand: DuPont Tyvek Model and Size: 1.5m x 50m - 75m2
Delivery Time: 2 - 3 working days
DuPont Tyvek FireCurb Housewrap is a high performance breather membrane that offers protection during construction and over the life of a building. The membrane's core is made of flash-spun-bond HDPE with transparent halogen-free flame retardant acrylic lacquer.  It self-extinguishes when ..
Brand: DuPont Tyvek Model and Size: 1.4x100m - 140m2
Delivery Time: 1 - 2 days
DuPont Tyvek Housewrap is a high performance breather membrane that offers protection during construction and over the life of a building. Due to its unique high-quality polyethylene single functional layer which comprises millions of microfibres bonded together to create a maze, Tyvek is impermeabl..
£108.10
£129.72 inc VAT
DuPont Tyvek Trifecta - A2-Fire Rated Breather Membrane - 1.5m x 25m roll
Guide Price
Brand: DuPont Tyvek Model and Size: 1.5m x 25m - 37.5m2
Delivery Time: 2 - 3 working days
DuPont Tyvek Trifecta is a high performance A2-Fire Rated breather membrane with W1 grade weatherproofing breather membrane with low vapour resistance. Tyvek Trifecta is non-combustible and doesn’t produce droplets or emit smoke when subjected to flame. Tyvek Trifecta is an airtight and waterti..
Guide Price: £435.00
£522.00 inc VAT
Brand: DuPont Tyvek Model and Size: 1x50m - 50m2
Delivery Time: 2 - 3 working days
DuPont Tyvek Supro Breather Membrane is a superior vapour-permeable underlay, able to provide air tightness and moisture protection in both commercial and residential buildings, especially designed to be used in various roof applications including cold, warm or hybrid and metal low pitched roofs, sa..
£104.66
£125.59 inc VAT
Brand: DuPont Tyvek Model and Size: 750mm x 100m - 75m2
Delivery Time: 2 - 3 working days
DuPont Tyvek StructureGuard Breather Membrane is a 750mm x 100m roll of superior vapour-permeable underlay, able to provide air tightness and moisture protection in both commercial and residential buildings, especially designed for timber walls, metal-frame systems, masonry and internal insulat..
DuPont Tyvek UV Facade Protective Membrane 1.5m x 50m
Guide Price
Brand: DuPont Tyvek Model and Size: UV Facade - 1.5mx50m - Free Delivery
Delivery Time: 2 - 3 working days
DuPont Tyvek UV Facade Protective Membrane is a lightweight, durable protective membrane designed for protection of ventilated and open rainscreen cladding systems, providing an additional protective layer from moisture, wind and UV rays. Although open cladding constructions may be aesthetically ple..
Guide Price: £308.75
£370.50 inc VAT
DuPont Tyvek Tape
Guide Price
Brand: DuPont Tyvek Model and Size: Tape - 75mmx25m
Delivery Time: 2 - 3 working days
DuPont Tyvek Tape is a single-sided tape made from UV resistant polypropylene film covered with a permanent acrylic adhesive, offering great adhesion and designed for making seals and in DuPont Tyvek weather barriers. Its main purpose is to improve air-tightness and water-tightness of wall..
Guide Price: £26.20
£31.44 inc VAT
1.5mm Visqueen Self Adhesive Membrane 1.5mm Visqueen Self Adhesive Membrane
Guide Price
Brand: Visqueen Model and Size: 20x1m - 20m2 - Free delivery
Delivery Time: 3 - 4 days
Visqueen Self Adhesive Membrane is a BBA Accredited self adhesive waterproofing system that can be used as a tanking or damp proof membrane for both horizontal and vertical applications. Visqueen Self Adhesive Membrane prevents the ingress of water and associated water-borne alkalis present in some ..
Guide Price: £196.85
£236.22 inc VAT
15mm Novia Double-Sided Butyl Tape 22.5m roll
Guide Price
Brand: Novia Model and Size: 15mm x 22.5m
Delivery Time: 1 - 2 days
15mm Novia Double-Sided Butyl Tape is a high performance, cost effective, non-toxic polyisobutylene (PIB) based sealing tape, which is used in a wide range of applications where products or installations need to be sealed against air and water ingress. Its strength and adhesion secure the membr..
Guide Price: £6.90
£8.28 inc VAT
Brand: Novia Model and Size: 48mm x 45m
Delivery Time: 1 - 2 days
48mm Novia Aluminium Foil tape is a high tack single-sided tape for use as a lap seal in Gas Barrier DPM installations or for Vapour Control Layer applications in walls and ceilings of insulated constructions. It is also suitable for use in damp proof membrane applications as a single sided lap..
£5.59
£6.71 inc VAT
Brand: DuPont Tyvek Model and Size: 1.5x50m - 75m2
Delivery Time: 1 - 2 days
DuPont AirGuard Reflective is an air and vapour control layer that is 100% air tight. It has a metallised surface with a very low emissivity internal vapour barrier that can enhance thermal comfort by reflecting up to 95% of radiant heat back into the building. It is usually installed with an air ga..
Easy-Trim Master 112GSM Breather Membrane for Pitched Roofs - 1m x 50m Roll
Guide Price
Model and Size: 1m x 50m
Delivery Time: 1 - 2 days
Easy-Trim Master 112GSM Breather Membrane is an air tight, vapour permeable, lightweight breather membrane for fully supported and unsupported installations in pitched roofs. It is a high performance breather membrane, consists of 3 layers to achieve a high vapour permeability, superior water resist..
Guide Price: £39.88
£47.86 inc VAT
Brand: Novia Model and Size: 4m x 20m
Delivery Time: 1 - 5 working days
Novia 1600g Radon Gas Barrier Membrane is a virgin grade polythene material suitable for use as a loose laid Radon gas barrier and damp proof membrane. The material has a thickness of 400 microns and is suitable for both taped or welded installations, Novia 1600g Radon Barrier is manufactured to co..
Novia 500G Vapour Control Layer 2.7m x 50m Roll
Guide Price
Brand: Novia Model and Size: 2.7m x 50m
Delivery Time: 1 - 2 days
Novia 500g Vapour Control Layer is a traditional specification, single-ply, non-laminated, virgin grade blown polythene material for use as an air leakage barrier and vapour control layer (AVCL) in insulated wall, roof and floor applications. It is is particularly suitable for use in residential tim..
Guide Price: £68.95
£82.74 inc VAT
Novia 509B Shed Lining Paper 1.8m x 50m Roll
Guide Price
Brand: Novia Model and Size: 1.8m x 50m
Delivery Time: 1 - 2 days
Novia 509B Shed Lining Paper is suitable for use in a wide range of garden structures and adds an extra level of protection to your building by creating a wind proof and waterproof outer layer. It is an ideal option for uninsulated garden structure construction and for renovating a current uninsulat..
Guide Price: £114.94
£137.93 inc VAT
Novia BS 1521 Grade A1F Building Paper 1m x 25m Roll
Guide Price
Brand: Novia Model and Size: 1m x 25m
Delivery Time: 1 - 2 days
Novia BS 1521 Grade A1F Building Paper is a traditional, reinforced kraft paper bitumen-bonded, building paper laminate for use as a waterproof building paper. It is manufactured with wet-strength kraft paper and meeting the technical requirements of BS 1521 for water-proof building papers, the prod..
Guide Price: £49.39
£59.27 inc VAT
Brand: Novia Model and Size: 1m x 250m
Delivery Time: 1 - 2 days
1m wide Novia FSPE Insulation Facing membrane is a 5x5mm scrim reinforced 18 micron aluminium foil PE laminate, achieving a Class 0 fire rating to BS 476 when used as a facing on suitable insulation substrates. Its 18 micron aluminium foil coating can offer enhanced U values within roof and wall con..
Novia Floorguard General Purpose Temporary Protection - 1m x 50m Roll
Guide Price
Brand: Novia Model and Size: 1m x 50m
Delivery Time: 1 - 2 days
Novia Floorguard is a basic low-cost recycled grey board suitable for all general temporary protection applications. It is water and slip-resistant and can be quickly and easily cut to fit any awkward shapes found on site.CHARACTERISTICS500 microns thick,Water resistant,Slip resistant.APPLICATIONFor..
Guide Price: £28.69
£34.43 inc VAT
Novia Methane Pro Gas Barrier DIY Kit Novia Methane Pro Gas Barrier DIY Kit
Guide Price
Brand: Novia Model and Size: Methane Pro Gas Barrier DIY Kit
Delivery Time: 1-3 working days
Novia Methane Pro High Performance Gas Barrier Membrane is a premium specification multi-layer laminate membrane incorporating reinforcement and an aluminium foil core for use as a methane and CO gas barrier in groundwork applications. It can also be used in radon gas barrier and damp proo..
Guide Price: £217.89
£261.47 inc VAT
Novia Methane Pro High Performance Gas Barrier Membrane  1.6m x 50m Roll
Guide Price
Brand: Novia Model and Size: 1.6m x 50m
Delivery Time: 1 - 2 days
Novia Methane Pro Novia Methane Pro High Performance Gas Barrier Membrane is a premium specification multi-layer laminate membrane incorporating reinforcement and an aluminium foil core for use as a methane and CO gas barrier in groundwork applications. It can also be used in radon gas barrier and d..
Guide Price: £212.12
£254.54 inc VAT
Novia Reflex Reflective Roof and Wall Breather 1.5m x 50m Roll
Guide Price
Brand: Novia Model and Size: 1.5m x 50m
Delivery Time: 1 - 2 days
Novia Reflex Reflective Roof and Wall Breather is a strong, lightweight, high quality low cost reflective breather membrane for all pitched cold and warm roofs and insulated wall applications. It can be installed in roofs as an ordinary breather membrane. This membrane can be installed upside down i..
Guide Price: £109.02
£130.82 inc VAT
Novia STRP Pro Vapour Control Layer 1.6m x 50m Roll Novia STRP Pro Vapour Control Layer 1.6m x 50m Roll
Guide Price
Brand: Novia Model and Size: 1.6m x 50m
Delivery Time: 1 - 2 days
Novia STRP (Super Tough Reinforced Polythene) Pro Vapour Control Layer is a premium specification reinforced and foil laminated polythene vapour control membrane for use in insulated wall, roof and floor applications. Specially suited for warm flat roofs, where very high concentrations of moisture v..
Guide Price: £168.76
£202.51 inc VAT
Novia Ultra Plus Roof and Wall Breather 1.5m x 50m Roll - 100GSM
Guide Price
Brand: Novia Model and Size: 1.5m x 50m
Delivery Time: 1 - 2 days
Novia Ultra+ Roof and Wall Breather is an entry-grade, versatile, ultra-low cost 100gsm breather membrane for use in pitched cold and warm roofs, and insulated wall applications. It has good water resistance with high breathability, The membrane is coloured light-grey on one side and white on the ot..
Guide Price: £47.09
£56.51 inc VAT
Novia VC2 Air Leakage and Vapour Control Layer 1.5m x 50m Roll
Guide Price
Brand: Novia Model and Size: 1.5m x 50m
Delivery Time: 1 - 2 days
Novia VC2 Air Leakage and Vapour Control Layer is a technologically advanced, flame resistant, reinforced and air-tight vapour check membrane for use as an air leakage barrier and vapour control layer (AVCL) in insulated wall, roof and floor applications. This membrane adds an extra level of safety ..
Guide Price: £82.46
£98.95 inc VAT
Novia VC2T Reinforced Synthetic Laminate 1.5m x 50m Roll
Guide Price
Brand: Novia Model and Size: 1.5m x 50m
Delivery Time: 1 - 2 days
Novia VC2T Reinforced Synthetic Laminate is a lightweight, easy to use flame resistant temporary protection, which replaces the old-style kraft paper.CHARACTERISTICSHigh quality low cost solution, Lightweight, yet strong and tough, HDPE scrim reinforced, Suitable for a wide range of temporary applic..
Guide Price: £82.46
£98.95 inc VAT
Novia VC8 Reflective Air Leakage and Vapour Control Layer 1.5m x 50m Roll
Guide Price
Brand: Novia Model and Size: 1.5m x 50m
Delivery Time: 1 - 2 days
Novia VC8 Reflective Air Leakage and Vapour Control Layer is a technologically advanced, air-tight vapour check membrane for use as an air leakage barrier and vapour control layer (AVCL) in insulated wall, roof and floor applications. This membrane prevents any surface condensation problems that may..
Guide Price: £80.44
£96.53 inc VAT
Powerbond Aluminium FR VCL Tape - 50mm x 47.5m Roll
Guide Price
Brand: Powerlon Model and Size: 50mm x 47.5m
Delivery Time: 2 - 3 working days
Powerbond Aluminium FR VCL Tape - 50mm x 47.5m Roll is a high-performance aluminium flame-retardant tape designed for use with Powerlon Ultrablock vapour control layers. The thermo-reflective tape will seal any gaps and laps and would contribute to the performance of the VCL.CHARACTERISTICSTechnical..
Guide Price: £7.13
£8.56 inc VAT
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