Found 85 results for the keyword ‘Condensation’

  • Vapour barriers in basements

    One of our viewers is about to insulate his basement and he has been told that he should not run the vapour barrier all the way to the floor. Fact or fiction? You should run the vapour barrier wherever there is insulation to keep the moisture on the warm side of the wall. And in a basement insta...
  • WHAT IS A PLANNED-HOLE-HIGH-IN-THE-HOUSE? 2

    Answer Two Any power exhaust ventilator taking its air from inside the house (bathroom fans, kitchen fans, clothes dryers, central all-house exhaust fans) will raise the neutral plane whatever the location of its input or output -- although they will be more effective if they draw air from high i...
  • Where is the best place to put a bathroom exhaust fan?

    Paul from Prince Edward Island needs an exhaust fan in his bathroom and wants to know where is the best place to put it.If you go up through the roof, you will be unable to totally avoid condensation in the top of the duct that can come back into the bathroom. I would prefer to avoid going throu...
  • Skylights that don't leak.

    Skylights are basically windows that are not vertical, but usually closer to horizontal as they sit on top of the roof.  Most are fixed but some open a bit for summer ventilation.  There also exist roof windows which are basically skylights that open wide and are much more common in Europe where ...
  • Insulating a foundation with embedded floor joists

      Certain parts of Canada, particularly in the Winnipeg region, have a traditional construction technique that presents serious challenges when you want to insulate a basement -- the ends of the joists are actually embedded in the concrete foundation wall.  Chris, from Winnipeg, asked for some f...
  • Overview: Attic Moisture

    Ventilation in a Canadian attic does very little to remove moisture when the temperature in the attic is below freezing. During that time, the moisture is in the form of Ice and the passing air simply won't remove it -- whether you have passive vents or power vents. When things warm up, if the ...
  • Double walls and buried vapour barriers.

    June is building a new home in Kenora and they have decided to make what is often called a double wall structure to have room for lots of insulation. They are intending to build with 2x6 walls and then add another 2x4 on the inside to hold more insulation. They have been told that they could do...
  • What causes metal studs to show through the drywall?

    Colour from the studs themselves is not really "bleeding" through the drywall, but it is the studs that are causing the problem.When metal studs are used in outside walls of a house, they conduct so much energy through the metal that the overall R-value of an R-19 wall drops to only R-10. When t...
  • Tips for working with fiberglass insulation

      CUTTING FIBERGLASS STRAIGHT AND SQUARE   It is always easier to cut fiberglass batt insulation if you compress it down as flat as possible. That way you can get through in one pass. Using a piece of plywood gives you a straight edge at the same time.         There is a special devic...
  • Installing a linen closet against an outside wall

    Peter from Toronto wanted to know about installing a linen closet against an outside wall. The major concern expressed by Jon was the moisture issue, as the closet is in a bathroom.The bathroom must have an exhaust fan to reduce the moisture accumulation.The outside wall of the closet should ha...