It's time to realise that lack of ventilation, not airtightness, is the new enemy.

How can we judge a building's performance when all testing methods have limitations?

The performance of windows can be greatly improved by ensuring insulation, weathertightness and airtightness layers connect.

Controlling moisture within the building structure can help protect the homeowners' investment while offering improvements to energy-efficiency, comfort and health.

As vapour diffusion takes place both in winter and summer, a solution that can predictably prevent moisture accumulation within the structure through all seasons is required.