Protecting foundations against water infiltration is crucial to prevent cracks and other damage to the building. HIZO offers a range of high-performance solutions for different types of foundation.

The signs of poor insulation can vary according to the season. Here are a few key indicators:


  • Cold drafts: Drafts around windows, doors and electrical outlets are a classic sign of poor insulation.
  • Temperature differences between rooms: If some rooms are noticeably colder than others, this may indicate insufficient insulation in certain parts of the house.
  • High heating bills: Poor insulation can lead to heat loss, which increases heating costs.
  • Cold walls and floors: Cold walls, floors and ceilings may indicate insufficient insulation.
  • Ice or frost forming on the roof: This may indicate heat loss through the roof, causing snow to melt and turn back into ice.
  • Moisture and mold problems: Excessive moisture and mold growth, especially in corners and on exterior walls, can be caused by poor insulation.


  • Excessive interior heat: If your home seems to be retaining heat, especially on the upper floors, this is a potential sign of poor insulation.
  • Expensive air-conditioning bills: As in winter, inadequate insulation can lead to increased air-conditioning use, raising energy costs.
  • Insect or pest invasion: Poorly insulated spaces can allow insects and other pests to enter the home.
  • Discoloration of walls or ceiling: This can indicate heat build-up, especially if the discoloration occurs near the roof or exterior walls.
  • General discomfort: If certain rooms seem constantly too warm, or if the air seems stagnant, this may be due to insufficient insulation.

In both cases, it’s also important to consider the age and condition of your home, as older homes are often less well insulated. If you suspect poor insulation, it may be worth calling in a professional for a detailed assessment and advice on possible improvements.