Air Tight materials – ecoEVO design

Is BLOCKWORK air tight, core filled or not?

Johnny K — Fri, 29 May 2020 06:43:33 +0000

Blockwork and Hebel Brick, are interesting products, and they provide so many features in construction, but can these types of walls be relied upon for airtightness? In this video we smoke test and pressure testing, blockwork and hebel brick, and also try some coatings in order to create an area barrier. Note that all test results are for this sample product specifically, and the air leakage rate due to the small sample is indicative only.

Other manufacturers blockwork products, can vary significantly due to different densities, porosity and surface qualities. The worst publically documented report on leaky blockwork is available below. An independent test (report number 109848) performed by HRS Services Ltd (UK , now part of Stroma Group) in 2011 demonstrated uncoated standard cellular blocks has the air leakage rate greater than 80m³/h/m². https://www.airtightpaint.co.uk/app/d…

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Air Barrier Tapes for Building Performance

Johnny K — Wed, 31 Jul 2019 02:16:21 +0000

Wraps and panel system need good quality long last high performing tapes that stick for the life of the building. Efficiency Matrix has a range of tapes to enable building performance but also to enable more cost effective troubleshooting for getting building to a better state of air tightness.

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Air and Vapour Permeability in your buildings wall sarking/wrap details.

Johnny K — Mon, 01 Jul 2019 02:24:10 +0000

Building wraps/membranes are useful for so many reasons. Building performance is only a part of the picture, when looking at control layers, with building envelope loads. When considering where the building is and what environment a building is maintaining, it becomes clear what we should be expecting from our wall systems.

Protecting the building during construction from weather conditions. over the duration of the build.
Controlling moisture in wall cavities is critical with a vapour barrier.
Improving insulation performance
Stopping moisture from outside getting into your wall system, and stopping moisture from inside getting in a wall system, with a vapour barrier on other circumstances.

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Vapour Permeable Wrap/Membrane Installation, IT’S NOT FOIL SARKING!

Johnny K — Wed, 16 May 2018 01:49:58 +0000

The correct way to install a Vapour permeable or vapour impermeable wrap, for air tightness to properly leverage the products that are being installed. Some installers are used to installing foil sarking which is not installed in an airtight fashion. Proctor, Siga, Proclima membranes and other high-quality membranes designed to be installed for airtightness are installed very differently. Airtight membranes are designed to be installed completely airtight, so we need to install them like that.

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