Concern & action: Increased infiltration

Unintended increase of air permeability caused by the installation of a new technology/alterations that require penetration of the building envelope (such as a new boiler flue, solar hot water or photovoltaic panel installation, relocation of kitchen sink waste pipe etc.). This can lead to unintended higher energy use and interstitial moisture problems.

Suggested actions

Before Implementation

Carry out air permeability test to establish level of air tightness. Ensure all services installers are aware of the buildings air tightness levels and impact of service penetrations on reductions to air tightness.

During implementation

Require all penetrations through walls, roofs and floors to be sealed back to retain the same level of air permeability.

After implementation

Carry out a post installation air tightness test to check levels have remained the same.