Solid constructions with reliable airtightness

In solid constructions, reliable airtight sealing can be achieved by a continuous internal lining of plaster. For effective application, all constructional and service leaks must be sealed:

  • Seal potential air paths caused by exposed studs and gaps between bricks.
  • Close off window and door openings in the external wall with a plaster skim.
  • Plaster walls completely, from floor to ceiling.
  • Where different materials adjoin, such as in the tile flap, gable wall and ashlar facing, all surfaces must be plastered, including channels, fuse boxes etc.
  • Infill channels cut for mains supplies with mortar to prevent air currents in the wall.

The difference between constructional and service leaks

Constructional leaks are leaks at junctions between the outer walls and the roof, or through perimeter joints in windows and doors. Service leaks are due to mains installations, chimneys and internal openings, such as interior doors.