Attics, a complex separation

Attics, still called peak, or even under roof, is the space between the ceiling of a House and its roof. This space, sometimes neglected, must, however, be the subject of great attention : insulation and ventilation are crucial. We prepare and repair your between roof so that it offers optimal comfort despite the temperatures to the north shore or the South shore of Montreal. This obligation of a between roof maintained and healthy is this dailleurs in the National building code.

Elsewhere the National Code of the building of the Canada (article 9.19) requires adequate ventilation of between it your house roof, that is the condition required by manufacturers of shingles and insulation to ensure their installation.

Improve the longevity of your roof and save on energy through the insulation and the ventilation of your attics.

Problems resulting from poor ventilation and insulation from between it roof :

  • Problem of frost in between it roof
  • Ice dam problem
  • Problem of water infiltration
  • Moisture problem
  • Mold problem
  • Problem of paint that is peeling
  • Problem of premature wear of the shingles of the roof

Problem of attics

The ventilation and isolation from between it roof are linked. Batts took moisture loses up to 50% of its insulation capacity : This is a typical problem of poor ventilation.

Poor ventilation will cause condensation, result of the temperature difference between the inside and the outside of the House and the presence of moisture, from the Interior of the dwelling. With the cold, condensation will form Frost. When temperatures become milder, the Frost melts and increases the presence of moisture from between it roof. It is this moisture that will be responsible for mold, infiltration of water or premature deterioration of the shingles.


To implement a good ventilation, We use soffits punched on the lower part of the roof. It's small grilles in aluminium with small holes that will allow air to seep. To allow the air out, We install in the upper part a fan. This fan will exhaust cold air which will itself take with him the hot air from the home and moisture. Without hot air and humidity, condensation will not happen more. It is important to check these entries and air vents are not blocked in the ventilation process, including through insulation (ex : mineral wool).

Our experts are able to provide you with an accurate diagnosis on your installation and your needs. Ask us for a quote, We will be happy to assist you.