Low Energy House

Low Energy House - Draught Proofing - Airtightness

In cold weather, warm air from inside the home passes naturally through the building envelope into the cold air outside. This warm air draws in cold air from the outside which enters the home as draughts. This is uncomfortable for occupants and an expensive waste of energy

Main Sources of Draughts in a HouseHeat Loss from Houses - Cracks, Gaps and Holes

The exchange of warm and cold air, which produces draughts through the building envelope, can take place dramatically where there are cracks, gaps and holes in the roof, walls and floors.

The main sources of draughts are:

  • External Doors
  • Windows
  • Fireplaces
  • Suspended floors
  • Lofts

Draught Proofing an Existing House

Draught proofing is one of the least expensive and most effective energy efficient measures in the home. It is particularly effective when combined with insulation.

Many cracks and holes in the plasterwork and finishes can be filled in the regular decorating process. Other sources of draughts can be stopped-up using draught proof seals.

Large holes, which often occur where cables and pipes pass through the loft floor, can be filled with expanding foam sealants.

If you are carrying out a comprehensive draught proofing scheme make sure you provide controllable ventilation to bathrooms, kitchens and utility rooms to remove water vapour and prevent damaging condensation