Step three: Once the adhesive has set, it is advised that secondary fixings are applied to Celotex PL4000 – ensure fixing details are in line with fixing manufacturer recommendations.

However, keep in mind that the tape may degrade and lose its adhesive properties over time and expose some points in the seal, compromising the integrity of your home. You can remove the damaged tape and replace it with a new one in time to avoid this issue. A serviceman staples a vapor barrier on a basement ceiling, the first step before applied seam tape Asphalt vs. Rubber vs. Acrylic Seam Tape For Vapor Barriers

Step one: Make sure walls are in a good condition and suitable for internal linings – take care to remove any vinyl wallpaper or gloss pain to leave the wall surface clean, dust-free and free from loose material(s). Ensure the wall is also dry, having any remedial work done prior to installation of the boards to remove dampness. VCLs prevent excess moisture entering a wall’s cavity, behind the insulation. This reduces the risk of harmful interstitial condensation by ensuring that any moisture within the cavity is at a manageable level. It is important to remember that no material is completely vapour proof so the term ‘barrier’ can be slightly misleading. VCLs or vapour barriers will only reduce the vapour movement to an acceptable level. However, if the joints and perimeters are not sealed correctly, the VCL / vapour barrier is rendered useless. Do I need Vapour Control Layers for my floor? If the roof is insulated with foil-faced insulation blankets, the aluminium side can serve as a vapour barrier at the same time. However, note that one should seal the seams here as well. Next to that, you may alsobuy a moisture regulating vapour barrier membrane that can manage the damp even better.

However in colder climates class l or class ll vapour retarders are advised in all new constructions such as glass, sheet metal and polyethylene sheets. Make sure it is continuous The most efficient way to cut Celotex is with a hand saw. Not only does this support minimal dust creation, but in many cases, you can use off-cuts to fill any gaps that may still be there during installation.

When is a Vapour Control Layer needed?

DAFA vapor barrier tape is included in the Nordic Ecolabelling database of construction products that can be used in Swan-labelled buildings. Step five: Fix plasterboard lining over the vapour control layer using suitable plasterboard nails or screws. A vapour barrier is there to diffuse moisture through a structure. Whereas an air barrier is there to prevent air leakage. For timber structures, initial/temporary fixing of the membrane is normally achieved with stainless steel staples. These may be positioned at the overlap where the vapour control and vapour barrier membrane is to be later sealed with tape. For best practice, fix the membrane using double sided tape, as this will help to minimise penetrations. Where shrinkage or movement within the structure is likely a flexible seal, such as butyl tapewill be of benefit.

Note: Avoid the load being directly applied to the Celotex PL4000. Mechanical fixings suited should be used for other internal fittings. Seek advice regarding suitable fixings from the manufacturer.Construction seam tape manufacturers understand the growing demands of homeowners and strive to introduce better products to promote a structure’s energy efficiency and service life.In addition, they want to ensure the products are durable and capable enough to work in different temperatures and climate conditions. Vapor barrier tape is widely agreed upon as necessary in certain conditions, but not as a whole-house solution in every situation. Most experts recommend that vapor barriers are best used in certain conditions and that the vapor barriers used should fit the climate, region, plus the type of wall construction. Homes in very hot and humid climates may benefit from an exterior vapor barrier that keeps outside humidity from penetrating into the interior walls.

Overlaps of the VCL membrane are sealed together with Double Sided Tape and the face of the joint sealed with Single Sided Foil Tape.Split-ability. Likewise, you want tape that’s easy to cut or split for application but that won’t tear by accident and ruin the moisture-resistant capabilities. Step eight: Apply appropriate sealant around the perimeter of the insulation – this will provide a vapour seal. Having both an air barrier and vapour retarders is important in more southern warmer climates to prevent humid air from the outside entering the cooler wall cavities. Below are a few things you should consider when choosing the best vapor barrier tape. Ease of Application