It is the responsibility of the client/main contractor to install any temporary seals before air testing can be carried out. These include bathroom and kitchen extractors, air supply grilles, mechanical ventilation devices, passive stack ventilation systems and trickle vents. This can be achieved using masking tape or similar.
If applicable, chimney flues will also need to be temporarily sealed by means of expandable balloon. We can provide these, however we need to be aware prior to our arrival.