Air tight penetration

Allows for greater airtightness over the alternative of puncturing the membrane with staples. Hi-Thermia Multi-Foil Insulation is a very flexible, easy to install and high performance thermal insulation material. PHS Spray Primer is a ready-to-use primer, designed to prepare various construction substrates. Hi-Thermia Reflective Membrane is very durable and provides effective condensation control for all building types. Used to bond membranes to substrates in order to maintain the airtight and vapour control integrity of the junction.

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Airtightness Products - penetration sealing, airtight membrane - Passive House Systems UK

First a bit of scene setting on why airtightness matters Airtight buildings are more energy efficient, they save money: Achieving a reasonable level of airtightness is important for the energy efficiency of dwellings and the comfort of occupants. The benefits of improved insulation levels and more energy efficient heating systems are lost if warm air can leak out of a building and cold air can leak in energy, leaking energy is leaking money. That is the air leakage rate per hour per square meter of envelope area. The significant point to note is that this test measures uncontrolled air leakage. It is not concerned with trickle vents, extract fans or ventilation systems. Controlled ventilation sources will simply be taped up or sealed prior to testing.
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Should tradespeople know about airtightness?

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