Blowerproof airtight liquid membrane gets BBA certified
Blowerproof liquid air-tight membrane has been certified by the British Board of Agrément. Blowerproof has been used widely across Europe for many years as a proven and effective method of achieving high levels of airtightness in many different buildings, and on a wide range of substrates.
This article was originally published in issue 21 of Passive House Plus magazine. Want immediate access to all back issues and exclusive extra content? Click here to subscribe for as little as €10, or click here to receive the next issue free of charge
Simply brushed, roller applied or sprayed on, Blowerproof quickly forms a permanent, secure and continuous airtight seal across a range of leak-prone points: wall/floor/ceiling connections, fenestrations, and pipe connections including water, electricity, gas and data — all with no need for primers.
Applied as a blue, thick, fibre reinforced ‘paint’, Blowerproof Liquid Brush quickly cures to form a black, sealed membrane which is highly resistant to punctures. Blowerproof is also available in white, so it doesn’t show through a plaster finish. Brushes rinse out under cold water, making Blowerproof Liquid Brush quick to deploy and pack away.
The roller applied version can be used directly on blockwork, brick, masonry and as a spray, which is ideal for larger areas such as walls and roofs. It can be directly spray-applied to the likes of mineral wool and sprayed set foams. Free from both volatile organic compounds (VOCs) and harmful chemicals, Blowerproof is safe to use in high risk environments such as food, childcare and medical environments.
Commenting on the newly certified system, Jack Georgiou, BBA project manager said: “Blowerproof was subjected to a rigorous assessment by the BBA. The results of stringent tests were assessed including fatigue testing after accelerated ageing to verify the efficiency and durability of the airtight seal.
“Blowerproof performed in all aspects of the assessment and tests so we’ve certified it as being an effective way to improve the airtightness of buildings.”
The brush applied version is being used to seal floor to wall junctions and ground floor service penetrations in Ireland’s largest certified passive house development to date, Durkan Residential’s 59 unit Silken Park scheme in west Dublin, which featured in issue 20 of Passive House Plus. The showhouse achieved a final airtightness test result of 0.2 ACH – one of the best permeability results ever published in Passive House Plus.
Meanwhile, leading passive house consultancy Encraft has specified Blowerproof on a number of its passive house projects. At St Johns Hospital in Lichfield 13 units have been tested to date, by Encraft’s well-known airtightness expert Paul Jennings, and all have passed the passive house target. “When specified and installed correctly Blowerproof has absolutely delivered,” said Jennings. “But it has also proven very helpful when dealing with failures on site. Normally we would have asked the team to remove and replace elements, with inevitable delays, but using Blowerproof meant that this wasn’t necessary.”
For more information see www.blowerproof.co.uk.