The Passive House Institute differentiates between The Passive House Classic, the Passive House Plus & the Passive House Premium. Learn what they are.

Most newly-constructed buildings in the UK and Ireland must undergo an airtightness test. But how does airtightness testing work, what different types of tests are there, and what do you need to do to get a building ready for testing?

Understand the difference between smart vapour variable membranes & the patented vapour control layer Majrex.

There is a widespread assumption that leaks in the building fabric supply useful ventilation air. The building regulations count on it, and ask less of the installed ventilation as a result. But can we really rely on gaps and cracks to help ventilate our buildings?

Airtightness is critical in new buildings. Here’s how you can pass your airtightness test first time by planning for it from the start.

“What are the advantages of airtight buildings?” – a question that not only we at SIGA, but also you as a builder or architect have often been asked. We list the main reasons.

This year the SIGA Airtightness Award will be presented for the first time. The special prize is awarded within the scope of the 24th International Passive House Conference.

Moisture causes all sorts of havoc when it accumulates where it’s not supposed to. These are the simple steps you can take to avoid that happening.

​Achieving a good airtightness test result doesn’t have to be hard, but it isn’t always easy. We sort fact from fiction by debunking some of the most infamous mistruths we’ve heard about airtight buildings.​

The most innovative engineers, scientists, architects and developers in Britain and the Republic of Ireland.