Making your Building Airtight

Before we carry out an Air Test we would recommend that you check the following: 

• Under floor ventilator grilles 
• Gaps in and around suspended timber floors 
• Leaky windows and door  
• Gaps around windows 
• Gaps at the ceiling-to-wall joint at the eaves 
• Open chimney 
•  aps around loft hatches 
• Service penetrations through ceiling  
• Vents penetrating the ceiling/roof 
• Bathroom wall vent or extraction fan 
• Gaps around bathroom waste pipes 
• Kitchen wall vent or extractor fan 
• Gaps around kitchen waste pipes 
• Gaps around floor-to-wall joints (particularly with timber frames) 
• Gaps around electrical fittings in hollow walls 
• All boxing sealed 
• Backs of toilets (particularly wall-hung WCs) 

Also, it is worth noting the guidance re: temporary sealing: 

Can be sealed: 

• Fireplaces/woodburners 
• Extractor fans and passive wall/ceiling vents 
• Trickle vents (2013 regs onwards)