Wall Wraps

The Bradford range of wall wrap products can provide a number of benefits to make your home more comfortable to live in and reduce the risk of condensation formation which can lead to mould.

Wall wraps are pliable building membranes that are applied to the outside of the building frame and offer benefits during construction, as well as when the home is complete. By protecting the frame, insulation and structure, wall wrap can further improve the comfort of your home.

The benefits of Wrapping
Selection Guide
Permeability Performance Comparison
Thermoseal Wall Wrap
Enviroseal ProctorWrap Wall Wrap

Vapour Permeable Product Solution

Bradford Enviroseal ProctorWrap

Enviroseal ProctorWrap products are highly vapour permeable products that allow water vapour to pass through them, whilst preventing the entry of liquid water and dust from outside. When used in colder climates where there is more moisture inside the home than outside, they allow moisture in the air to pass through the membrane before condensing to water (condensation) safely on the outside of the building frame where it does not damage the home.

These products are recommended for use in colder climates where the risk of condensation formation increases as the temperature of the outside environment falls, while the inside of the home is heated.

Key product features:

  • Reduces the risk of condensation formation inside the building frame in cold climates*
  • Improves energy efficiency by reducing draughts allowing insulation to work more effectively
  • Protects the building frame from decay by reducing the entry of wind driven rain and dust.

*If the membrane is to provide a continuous condensation layer, all joins, penetrations and discontinuities should be sealed

CSR Bradford offer a range of technical services including condensation modelling for project or climate specific applications by different construction types – advice should always be sought regarding high humidity environments such as indoor swimming pools or spas.

The drive for energy efficient buildings has resulted in higher levels of insulation in the roof space and walls, as well as reduced air leakage due to modern energy conscious building practices. As a result, this has dramatically changed the temperature and moisture balance within buildings, which has changed the location and frequency of where and when condensation is likely to form. When the surface where condensation wants to form shifts from outside to inside the home, condensation can potentially cause damage to the building frame, cladding and insulation, potentially allowing mould to grow, impacting your families health.

The Bradford Enviroseal™ ProctorWrap™ range of construction fabrics represent the latest in moisture control, vapour permeable water tight membranes. These products are designed to reduce the risk of condensation forming on surfaces within the building frame where it is undesirable. While allowing moisture to pass outward from the inside of the building, these sophisticated membranes prevent the ingress of water and dust from the outside environment both during and after construction.

These membranes may be used in all climate regions except where high humidity environments where cooling of the interior by air conditioning is the predominate climate control mechanism throughout the year. These membranes are ideal for lightweight clad construction such as fibre sheet cement, where high water holdout is typically a requirement of the cladding manufacturer.

CSR Bradford offer a range of technical services including condensation modelling for project or climate specific applications by different construction types – advice should always be sought regarding high humidity environments such as indoor swimming pools or spas.

Where condensation forms in the building

In an energy efficient airtight building with a conditioned internal environment, moisture is added to the air by the occupants who are showering, cooking and breathing (we all expel CO2 which contains moisture). This creates an internal environment with a higher vapour pressure than the outside environment which forces or ‘drives’ the water vapour in the air outward in every direction looking for equilibrium.

As this vapour ‘drive’ occurs and forces moisture toward the cold outer surfaces of the building structure, impermeable materials such as glass, steel, plastic and traditional aluminium sarking materials cannot allow it to escape. As a result, there is a risk that condensation can form on the inside of the building, just as mist or droplets of condensation form on the inside of a window on a cold night. To minimise this risk, the Enviroseal ProctorWrap membranes allow moisture to easily pass through the sarking with minimal resistance, allowing any condensation formation to occur on the outside of the building as shown in the following diagram.

Where condensation forms in your home

Use the table below to help select the most appropriate product or contact CSR Bradford for further assistance.

 APPLICATION  PRODUCT  MATERIAL CHARACTERISTICS




HIGH VAPOUR PERMEABILITY
Residential Wall
(RW) 
Residential Wall (RW) is a lightweight vapour permeable spunbond polyolefin membrane, with a ‘soft’ textile construction designed to reduce ‘wind flapping’ noise when exposed to applications that allow airflow through the cavity. Suitable for use with brick, timber or steel, this is a non-reflective, highly permeable product – 4.5µg/N.s.
Commercial Wall
(CW)
Commercial Wall (CW) is a lightweight vapour permeable product, with a tough spunbond polyolefin membrane designed for medium to high density construction where a tougher membrane is required during construction. Suitable for use with brick, timber or steel, this is a non reflective, highly permeable product – 4.2µg/N.s.

*In accordance with bursting strength.

Specifications

 

Duty Roll With (mm) Roll Length (M) m2 per roll Rolls per Pallet
EnviroSeal Roof Metal / Wall Light 1350 30 40.5 50
60 81 50
EnviroSeal Wall Wrap Medium 1350 30 40.5 100
60 81 50
EnviroSeal Wall Breather Light 1350 30 40.5 100
60 81 50
Enviroseal ProctorWrap Fixing Tapes
Build faster with RapidWrap
Managing the risk of condensation