4x25M 125MU/500G CLEAR POLY VAPOUR BARRIER. FUNCTIONALITY: WATER VAPOR AND AIR TIGHTNESS Water vapour transmission (sd) EN 1931 m 5 2 8 Density of water vapour flow rate (g) EN 1931 kg / (m² s) 0,8E-7 0,5E-7 2,04E-7 Temperature resistance - °C - -40 +80 Durability (exposure to artificial ageing) Water vapour transmission properties EN 1931 pass / no pass pass - - Product Description. Novia Vapour Control Layer - 500G Polythene VCL - 2. Novia 1000G Vapour Control Layer AVCL ǀ 100m2. Product Code: 18768; Manufacturer: Visqueen; Width: 2. Primarily. It is not intended for use either as a damp proof membrane or a Roof Sarking. The best moisture control must also have air-sealing gaps. £195. Easy Trim Master Breather Membrane 50m X 1. Price per 100 sq. Novia 500G Vapour Control Layer Polythene AVCL ǀ 135m2. Features & Benefits: Manufactured to ISO 9001 and ISO 14001. 20 m. Controls air movement. Complies with BS EN 13984. The humid air is indoors. Add to basket. Place the liner in the water and swish it around for a few minutes. Preventing the Loss of Conditioned Air. Type 2 vapor barriers, the basic vapor barrier for ordinary conditions, are defined as having a permeance less than or equal to 60 ng/(Pa·s·m 2) of moisture passage. ca. Reduced convective heat losses. Add to basket. “We might imagine a future in which the building code sections that address the vapor barrier would all go blank,” Rose wrote. 35 meters (53 inches) wide by 50 meters (164 feet) long. Company Video. Celotex CW4050 Cavity Wall Insulation Board 1200 x 450 x 50mm - 5. (Each) Add to basket. Novia 509B Reinforced Kraft Lining Paper ǀ 90m2. , and Twin Maple Group have been collaborating to research the use of the aluminum reflective foil insulation as replacement for vapour barrier in wall building systems. Well-sealed drywall in itself makes a great air barrier. Moisture barriers are usually installed on the warm side of the wall. VAT. 41. Just Bill · #2 · Dec 28, 2008. co. Configuration: Multifold. £136. Procheck 300. Novia Vapour Control Layers are sealed using one of our double-sided butyl tapes, using a minimum overlap of 150mm. 49. The job of a vapor barrier is to prevent vapor diffusion, and the job of an air barrier is to stop air leakage through differences in air pressure. There are several examples in both API RP 500 and API RP 505 where vaportight barriers are used to limit the migration of flammable gas and/or vapors from a classified enclosed area into the surrounding area. Vapor barriers can help control moisture in everything from basements and crawl spaces to ceilings and walls. (eg breathable roof underlays and air leakage barriers), BS 1521 does not give guidance on suitable use, and as such this product is a generic material, serving a wide range of end-user defined applications. 38 mm), and 20 mils (0. Novia 1200 VCL is fully CPR compliant and is UKCA Approved to EN 13984. 38: Polythene Vapour Barrier 125mu/500g quantity. View all: Capital Valley Plastics Ltd Membranes & Barriersvapour barrier, in terms of water vapour permeance, plays a very important role in the overall moisture response of the wood-frame stucco wall. Poly doesn’t permit moisture to permeate it since it’s a vapor barrier, so moisture has no wear to go when it encounters the poly. This plastic sheeting is commonly used to protect a building's concrete slab from moisture rising from the foundations. Novia Vapour Control Layer - 500G Polythene VCL - 2. 23kg roll weight. £125. £48. Visqueen Gas Barrier is a multi-layer reinforced polyethylene gas barrier with a 20 micron aluminium foil. ft. ROLL. If the plastic (6 mil min) is not large enough to cover the entire envelope in one piece, it should be installed at the bottom first, overlapped so. For use with vapour barrier membranes. Ideal for timber frame construction, flooring and ceiling applications. 22, 2022 (GLOBE NEWSWIRE) -- Future Market Insights (FMI) has anticipated the demand of Vapour Barrier Market to witness a year over year growth of 4. As I wrote in a recent article on controlling liquid water, the liquid water control layer is also called the drainage plane or the water-resistive barrier (WRB). overlapping the base rail. 1. Polyethylene (plastic) covering is often used as a vapor barrier. 3. 2mm thick or 200 µm, which is the thickness in microns. 3. Stains or Peeling Paint: Water stains on walls or ceilings, as well as peeling or bubbling paint, are signs of moisture issues. Damp-proof membrane is used to protect buildings from moisture by creating a damp resistant barrier. All vapour control materials should come with an approval certificate or under EN13788 must be specified by condensation risk analysis. Maintains insulation performance by up to one third. Its purpose is to help prevent water vapour from reaching building walls, ceilings, attics, crawlspaces or roofs, where it can condense and cause building materials to rot or grow mould. pdf. Our patented configuration includes reflective technology and other insulating layers to create optimal thermal performance while preventing unwanted moisture from migrating into the space. Where it is located in an assembly and its permeability is a function of climate, the characteristics of the materials that comprise the assembly and the interior conditions. ft. 200g/m2 - 500g/m². Benefit. Ask a question. blown polythene material. Metallised BOPP tape. Product Width. Removing excess spray foam with a kitchen knife. A vapour barrier should be used in order to prevent moisture from passing through a material. ★★★★★. Application Conditions / Limits Notes on Application/Novia VC2 Air Leakage and Vapour Control Layer Novia 500G Vapour Control Layer Novia 1000G Vapour Control Layer Novia 1200G Vapour Control Layer Novia STRP Reinforced Vapour Control Layer Novia FSPE Class O Insulation Facing Novia STRP Pro. 45m x 50m and 4m x 50m. 7. Here are four tangible benefits to air barriers: 1. 5m at Screwfix. Visqueen EcoMembrane DPM is manufactured from a minimum 90% recycled polyethylene. Moisture can come from ground outside, can be wicked up from footing ("rising damp"), or from warm air condensing on cold concrete surface (requires some air leakage, or convective currents within cavity). £ 117. Vapour barriers and Showers. £ 43. Offers full-adhering, watertight laps at all joints. Code: IW1153. Novia 1200 VCL is a high specification, blown polythene material, suitable for use as a vapour control layer within the walls of timber frame constructions, or where control of the passage of water vapour is required. Damp-proof membranes are a versatile product and can be used for a wide range of applications, such as creating a protective. Commerce House, Festival Park, Stoke-on-Trent, ST1 5BE, United KingdomStego Installation Support. , a low-slope exposed membrane roof with a deck level vapor barrier)However, only an air barrier prevents airflow (and the moisture attached to it) into the envelope. Tel: 01254 661188. 37. VAT. Lower Philips Road, Whitebirk Industrial Estate, Blackburn, Lancashire. Canadian building codes require a warm-side vapour barrier (up here that's <1 perm), so a class 111 VR wouldn't fly. Keep in mind, residential foundation characteristics can vary by region and project, but termination points usually include the perimeter of the slab placement area, like at a concrete stem or basement foundation wall. 69 +VAT. Add to wish list. Solid Radiant Barrier Foil - 4' x 125' (500 sq ft) 21 reviews. Transparent, able to see fixing points. Rust Remover Soak $ 34. Other authorities either explicitly or by inference define a vapour barrier with respect to its resistance to the passage of water vapour by diffusion. Produced from Recycled Material. NHBC Standard 6. 98. Vapor barriers restrict water vapor migration by limiting the flow of water vapor (diffusion) through materials. £ 74. 2. Product code: P1-1206 MPN: Novia 500G Vapour Control Layer Colour: Translucent green tint Length: 50m Material: Blown polythene Thickness: 125 microns ǀ 500 gauge Weight:. 4m L50m 125mu/500g; Vapour Check W2. The sheet is translucent to ease the installation and later inspection of support arrangements, and is the grade utilised by many leading system. If the roof is insulated with foil-faced insulation blankets, the. View Mobile Number. Membranes were joined either with tape suited to the individual system. Polythene Vapour Control Layer 500 Gauge - 125MU Green Tint 2. If the poly is below the dew point, you get condensation on the poly. Product Description. 98. 99 ex. 9′ X 100′. By controlling heat transfer and reflecting heat inside the building, they help keep buildings cool in summer, and warm in winter. $94. 79. Area. A highly vapour and water-resistant low emissivity internal vapour barrier, it considerably reduces interstitial condensation as well as improves thermal efficiency by reflecting up to 95% of radiant heat. BS 1521 Building Papers have been available for many years, and are a general range of building membranes. The cool surface is the sheathing, assuming no exterior insulation. 91. Novia 500 Gauge Vapour Control Layer AVCL is a high-quality, single-ply, non-laminated, virgin-grade blown polythene 125 micron material that is suitable for use in residential timber frame applications. Debunking the top 3 myths about vapour barriers and foam rigid insulation. Abstract and Figures. Vapour Barrier 3015 3M™ Air and Vapour Barrier 3015 Sheathing Framing 3. Our Tri-laminate foil barrier film is at the top of the chart with the lowest values. Add to Basket. Vapour barrier used in dry lining / timber frame buildings. Water vapour transmission (sd) 5m. It is silver on the upper surface and supplied in rolls 1m x 20m. A lightweight, reinforced, polyethylene, vapour control layer for use within roof and wall constructions to prevent warm, moist air escaping from inside the building and condensing within the insulation. The same goes for basements, which are another prime target for moisture problems. 00. " I'm guessing by "marking below" he means any markings I place on the PIR to show (for example) where I don't want pipework. Vapour Control Layers (VCL) Vapour control layers (VCL) are sheets of material that prevent water vapour from accumulating in the structure of a building. This product also performs the additional function of an air-leakage barrier, to prevent losses due to unwanted convection flows. Add to basket. 006-in T x 59-ft L x 102-in W. The old school in me says put the vapor barrier to the interior, but when insulating a floor and adding an inch of foil-faced polyiso with taped seams under the floor joists, the vapor barrier (as well as air barrier) is at the. Novia 500 Gauge VCL is a blown polythene material suitable for use as a vapour control layer within the walls of frame constructions, or where control of the. Quantity: FREE Click & Collect within 30 minutes. Wickes Green Polythene Vapour Barrier - 2. 1. 77. Air barriers, however, limit air migration by restricting air through a material. According to EPA guidelines, installing vapor barriers on the walls and floor of your crawl space can keep water vapor at bay. These membranes are important building components, preventing water vapour from entering areas where it can condense, can often lead to the growth of mould, mildew and rotting. Description. Vapour Barriers ; Vapour Check W2. In order to demand higher performance in buildings by combating air leakage and vapour diffusion (the movement of water vapour through a material), building codes in the US and Canada adopted the requirement for buildings to have a vapour barrier, for which they designate as a membrane that has perm rating less than 1. The product is black or blue in colour and available in three thicknesses: 0. Change settings. 7M x 50M. 5 x 20m. Vapour barrier used in dry lining / timber frame buildings. Suitable for a wide range of construction projects where control of water vapour is required. A vapour barrier prevents moisture vapour moving through a construction element or material by diffusion, and because it stops the smaller air molecules, it also stops air. Using Tapes with Novia Vapour Control Layers. Vapour Barrier also restricts the movement of warm moist air 4m x 25m x 500g (100sqm) Clear Polythene Vapour Control Layer (VCL) For use within wall, roof and floor construction Vapour Barriers are used within structures to prevent moisture from penetrating the surface of the structure and to improve its airtightness. The 500ga Green Polythene Vapour Barrier 4m x 50m prevents moisture damage and mould by. It acts as a vapour barrier, restricting the passage of warm, moist air within the structure or the roof of a property. TrustSEAL Verified. VCLs can help to rectify these. Vapour Check. This, in turn, lowers your. Visqueen A2 Vapour Barrier is a multi-layer reinforced aluminium AVCL (air and vapour control layer). Great for laminate & engineered floating floors. The water vapor control layer is also called a vapor retarder or vapor barrier. This paper explores the use of vaportight barriers as basis for classifying hazardous locations. Moisture Barrier vs. View all: Capital Valley Plastics Ltd Membranes & BarriersVisqueen Single Sided Vapour Tape, 50mm x 15m VisqueenPro Double Sided Vapour Tape, 20mm x 50m Visqueen Double Sided Vapour Tape, 20mm x 50m VisqueenPro Single Sided Vapour Tape, 75mm x 15m VisqueenPro Vapour Edge Tape, 150mm x 15m Visqueen FR+ Vapour Tape, 75mm x 25m Visqueen FR Vapour Tapes Visqueen A2. Also commonly used to cover crawl spaces and as a temporary cover for equipment. Moisture in the indoor air can condense on cold surfaces in your basement, forming. Shop Vapour Barrier - Insulation in-store or online at Rona. Sealing off the barrier to stop water ingress is a bandaid patch. Sort By. For use as an air leak barrier and vapour control layer (AVCL) in insulated wall, roof and floor applications. The U. 1. BBA Certificate Visqueen IGW Admix. Only use material rated as heavy duty or better (to AS/NZS 4200. Few topics in building science have been as thoroughly haggled over as vapor retarders, the materials designed to keep water vapor from migrating into wall and roof. This should be used in conjunction with Double Sided Butyl tape, which is used for the overlap seals. Water Barrier vs. This Polythene Vapour Control Layer (VCL) 500g (Green) is a [300mu/1200 – 125mu/500] gauge high specification, blown polythene layer. Currently in Stock. com. In Australia, the thickness of builders film is measured in microns (um). Prestige Building Supplies > Everyday Essentials > Dust Sheets & Protection > Drop Sheets > 125mu Vapour Barrier Green 4m x 50m(500g) 125mu Vapour Barrier Green 4m x 50m(500g) /unit . 1m for easy handling. Our mosture vapour barrier coatings allow for the surface of the substrate to be adequately primed prior to the application of a waterproofing membrane. A polymeric release liner protects the adhesive. The difference between air barriers and vapor barriers and how to apply them. It is made mostly from recycled paper, and includes a fiberglass reinforcement grid. Video of the Day. A lightweight, reinforced, polyethylene, vapour control layer for use within roof and wall constructions to prevent warm, moist air escaping from inside the building and condensing within the insulation. Apply 3M™ Polyurethane Sealant 540, 3M™ Polyurethane Construction Sealant 525 or other compatible sealant around junction. 2 mm thick). Using Tapes with Novia Vapour Control Layers. 04. We are one of the leading manufacturers of advanced barrier technologies and design-based solutions for specifiers, contractors and builders merchants throughout the UK and Europe, you can count on Visqueen for product quality. 45mx50mx125mu (500 Gauge) is manufactured from recycled polythene to meet NHBC standards. Visqueen Gas Barrier is a multi-layer reinforced polyethylene gas barrier with a 20 micron aluminium foil. This barrier controls damp and stops moisture and water passing through walls and floors into internal spaces. VAT. Insul-Barrier is an insulated vapor barrier designed for the crawl space. A vapour barrier can easily be realised with a plastic foil like Polythene (at least 0. The underfloor heating vapour barrier should be laid on the top of the insulation and sealed at the edges, this also forms a seal eliminating any of the warm screed floors coming in contact with the cold concrete sub-floor, should the. Other products of interest. £33. WATTS Water Hammer Arrestor 15M2A GEE-FIX Canvas Cloth Coating 30-36AF Anti Fungal UAE. Download. Controls air movement. This tape is made of a UV resistant polypropylene film and coated with a specially formulated solvent-based acrylic adhesive. When attaching a vapour barrier to foam board insulation, it is important to ensure a proper fit and seal to prevent any moisture from. DUBAI, United Arab Emirates, Feb. Vapour Barrier also restricts the movement of warm moist air and i. Stego Wrap Vapor Barrier – it comes in various thicknesses: 10 mils (0. Made in the UK from recycled polyethylene. 1-877-464-7834. Stego is the leader in the below-slab concrete vapor barrier market. Additional information. Plastic on the outer surface of a wall in cold weather could cause problems. The thermal control layer is also called insulation. This can be attached with staples beneath the rafters or trusses on the inside. It restricts the penetration of moisture into structures and increases the airtightness of buildings. Membrane can be left exposed to UV rays. As for warehouses where floor may be just bare concrete, vapor barriers may be omitted. 2mm in thickness to effectively create a moisture. Well, vapour barriers are installed in order of preventing such water from penetrating through the walls or ceilings, get inside and damage your plasterwork and in time the whole construction. For a shed/office, 500g polythene sheeting would do (the proprietory products are more expensive). 40 Select options;. 04. 99. Vapour Barrier also restricts the movement of warm moist air . When condensation builds up in properties it can lead to the development of dampness, mould and rot, which can cause both structural and health issues. Backed by unparalleled project and educational support, Stego 15-Mil. Courtesy of Steve Maxwe. It is suitable for walls, roofs, and floors with high humidity levels such as bathrooms or kitchens. The woven extruded polypropylene multifilament scrim reinforcing provides improved nail tear resistance. These types of vapor barriers include glass, sheet metal, polyethylene sheets, and rubber membranes. Tailored for application on the warm (insulated) side of buildings, this 1200G VCL fully. April 15, 2011. Crafted from virgin-grade materials, guarantees longevity and reliability. Protect your buildings from mildew, staining and frost damage caused by interstitial condensation using this vapour barrier from Damplas. Add to Cart Get Best Price Add to Wish List. Novia VC4000 FR. 75. Step Eight: Installing Vapor Barrier Liner. COMPOSITION: Stego Wrap Vapor Barrier is a multi-layer plastic extrusion manufactured with only high grade prime, virgin, polyolefin resins. Substrate Preparation Remove loose ends, clean or prime depending on substrate. Customised for application on the warm (insulated) side of buildings, this cost-effective 500G VCL fully complies with CPR standards and holds CE approval as a dependable vapour. The function of a vapor barrier is to retard the migration of water vapor. TPS - Temporary Protective Sheeting. The vapour permeance of the new generation appears to be slightly less than the previous one. £0. Features & benefits. Vapor barriers act as a barrier between structures and moisture, preventing moisture and condensation from forming and. Installer Friendly . The seams must be sealed with tape and the edges of the foil should overlap a little (a few inches). Butyl Tape is used to ensure the efficient installation of all Novia Vapour Control Layers and Gas Barriers. Delivery Next day available. BB1 5UD. Vapour Control Layers or VCL's protect your home and building from the harmful effects of moisture and are an absolute must to maintain a healthy and stable building fabric. It behaves and is applied the same way as standard latex primer, and has a perm rating of about 0. VCLs are designed for use on the inside of insulated buildings to manage the flow of water. It is specially formulated for use over most type of thermal insulation, both interior. Contact Us. It covers topics such as moisture sources, transport mechanisms, building envelope design, indoor air quality, health impacts, and. Tuffreel™ Vapour Barrier conforms to the requirements of BS EN 13984:2013 – Flexible sheets for waterproofing – Plastic and rubber vapour control layers – Definitions and characteristics. By keeping your building materials dry, you prolong their life and maintain the efficiency of. Add to Basket. A lower water transmission rate is better. ENVIRONMENTAL FACTORS: Stego Wrap 20-Mil Vapour Barrier can be used in. This is the function of air barriers. Vapour Barrier also restricts the movement of warm moist air and i. Learn more. A smarter approach to air and vapor control. 54/m²) Basic grade of CE approved virgin grade polythene vapour barrier comes in 2. Lay down sections of the vapor barrier you cut based on your crawl space’s measurements. 2. Most rigid board is R-5 per inch so you probably need 2 inches to create the thermal break necessary. Conceptually, the “air/vapour barrier” was a material purported to address both air infiltration and vapour diffusion issues. Find the right Building Supplies on sale to help complete your home improvement project. In summer, we normally cool and dehumidify the air to a lower temperature and humidity than the exterior environment. . £78. Beyond its adept moisture management capabilities, the Novia 1000 VCL serves as a highly effective barrier against air leakage, effectively thwarting. All rolls are supplied multi folded. 4m. C. Article #2264002. This Polythene Vapour Control Layer (VCL) 500g (Green) is a single-ply, non-laminated, virgin grade blown polythene material. Air barriers can be either vapor permeable (allowing water vapor to pass through) or vapor impermeable. 40-6:USES: Stego Wrap 20-Mil Vapour Barrier is used as a below-slab vapour barrier. 89 ex. Visqueen 300mu Damp Proof Membrane 25 x 4m Black. The “smart” barrier we chose is MemBrain. ENVIRONMENTAL FACTORS: Stego Wrap Vapor Barrier can. The vapor barrier is usually installed on top of the ceiling under the insulation. Novia 1200 VCL should be used in combination with Novia breather membranes to provide an air-tight and vapour resistant system. The two most commonly used thicknesses are 300um and 200um. Novia 500G Vapour Control Layer Polythene AVCL ǀ 135m2. Complies with BS 8485:2015 + A1:2019 - industry standard for methane and carbon dioxide protection. Its purpose is to stop moist air from penetrating the insulation and condensing on the cold side. Powerlon VCL 170 Air and Vapour Control Layer - 2m x 50m Roll. £369. Order Capital Valley Plastics Ltd Vapour Barrier Green 300ga 20m x 2. A: A damp proof membrane (DPM) is a thick plastic sheet used as a waterproof barrier between a concrete subfloor and wood floor. Novia 500G Vapour Control Layer Novia 1000G Vapour Control Layer Novia 1200G Vapour Control Layer Novia STRP Reinforced Vapour Control Layer. Oil paint on plaster walls or drywall will prevent moisture from absorbing into the wall cavities just as a poly vapour barrier would, but it. Description. ft) CGSB Approved 6 mil Vapour Barrier. This can be attached with staples beneath the rafters or trusses on the inside. View all: Capital Valley Plastics Ltd Membranes & Barriers. Features & benefits Novia 500 VCL is a low-cost, blown polythene material, suitable for use as a vapour control layer within the walls of timber frame constructions, or where control of the passage of water vapour is required. Damplas Vapour Barrier Roll, 4m x 50m 125mu, Green Tint. " We recommend a heavy duty 500G (polythene gauge) / 125m u (micron thickness) polythene membrane for the vapour barrier, green/clear so that you can see any markings made below. The air control layer is also called an air barrier. ROLL. Vapour Check W4m L50m 125mu/500g. 18+, T&C apply, Credit subject to status. This product performs the additional function of an air-leakage barrier, to prevent losses due to. 0m x 50m roll format. If water vapor diffuses or infiltrates into the wall cavity and finds the cool surface, moisture problems can occur. Air Barrier Systems 9. (0) Details. Stock level: 73. K800-005. 60. 6 mil poly can work effectively as an air barrier if it is carefully sealed, but so can other materials. Novia Vapour Control Layer - 1200 Gauge Vapour Barrier - 4M x 25M. A vapor barrier is material that prevents water vapor transmission, as compared to a vapor retardant material that has varying degrees of permeability that allow some vapor to pass back and forth through it. Vapour Barrier also restricts the movement of warm moist air and improves building insulation. Nationwide delivery available! Toggle navigation. Using enhanced technology, Novia has created a highly reflective vapour control layer suitable for use in insulated wall, roof and floor applications. The vapor barrier, if any, on a below-grade masonry foundation wall should be against the masonry, on the "outside" of any insulation. 25 mm) thick and is available in clear, opaque,. Supplied centre-folded in 2. A well-installed vapor barrier helps protect against potential water damage or mold growth down there, too. Heavy duty clear polythene for longer term applications. Putting spray foam to seal the celotex to the panels. 42. They do this for two main reasons: to prevent moisture from the soil permeating up through a slab and into a house (also known as rising damp); and. A vapor barrier is a material that prevents moisture (such as moisture from a leaky pipe) from reaching the inside of the house. Damplas Vapour Control Layer (VCL) is intended for use within Flat Roof structures to prevent the penetration of moisture into structure surfaces and to improve the airtightness of buildings. Get Quote. Colour: Clear. In systems with two vapor barriers (e. A vapor barrier can act as a very effective air barrier, but an air barrier does not (and should not) always stop vapor. VAT Pay in 3 interest free payments with. 23 in stock. For instance, the vapor barrier could be damaged if placed directly behind plasterboard and when later on holes are drilled or screws are inserted. 16BFO1 Barrier Fencing OrangeVisqueen Single Sided Vapour Tape, 50mm x 15m VisqueenPro Double Sided Vapour Tape, 20mm x 50m Visqueen Double Sided Vapour Tape, 20mm x 50m VisqueenPro Single Sided Vapour Tape, 75mm x 15m VisqueenPro Vapour Edge Tape, 150mm x 15m Visqueen FR+ Vapour Tape, 75mm x 25m Visqueen FR Vapour Tapes Visqueen A2. TYVEK® Supro Breather Membrane. Vapor Guard Barrier - Polyethylene - Clear - . This product also performs the additional task of an air-leakage barrier, to prevent losses due to unwanted convection flows. Roll Length: 50m. The Felt550® creates an air gap between the vapor barrier and the soil, enhancing the results of the active Radon fan (s). Weighs 30 Lbs. A lap-seal is then applied on top using either one of the foil tapes or metallised BOPP tape. Visqueen Vapour Barrier is a green tinted, semi-transparent polyethylene air and vapour control layer (AVCL). When installing the vapor barrier, it is also important to consider how the area will be used in the future. Speedy Delivery. The cost per gallon is comparable to standard paint. What is the difference between a vapor barrier and a vapor retarder? For the purposes of construction, this is only a difference in terminology. Some people install a layer of insulation between the vapor barrier and the insulation. We are one of the leading manufacturers of advanced barrier technologies and design-based solutions for specifiers, contractors and builders merchants throughout the UK and Europe, you can count on Visqueen for product quality. Clear Vapour Barrier 4m x 25m 125mu 500g. Delivery Next day available. Scenario 3: plastic on the outside, cold weather. in accordance with the design. Product Overview. 125mu/500g: £48.