Found 85 results for the keyword ‘Condensation’

  • WHICH DEHUMIDIFIER IS BEST?

    The only type of dehumidifier that is any good at all during the winter is a fresh air ventilation system. Mechanical and chemical dehumidifiers are not only expensive and bothersome, but they cannot generally reduce the relative humidity to less than 50 per cent -- not low enough to keep frost ...
  • Air Spaces in Walls -- Myth and Science -- Overview

      Walls often have air spaces hidden somewhere between the siding on the outside and the drywall on the inside.  Some are accidental -- some on purpose, even code required -- some served a purpose at one time in history but because of the evolution of construction, are no longer useful -- some a...
  • What is the proper level of humidity for a house in the winter?

    Victor from Stoney Creek, Ontario writes: "My house is a 3 level back split and is 3 years old. The furnace is natural gas. I am having problems with condensation and mould on my thermal windows! The window manufacturer said that there is too much humidity and that thermal windows always get cond...
  • Air tight electrical boxes

    Vapour Barriers should go on the "Warm in Winter" side of the insulation so that they can stop all the moisture in the air from going through the wall, but stop it where it is still warm and there will be no condensation. The problem is that a lot of air, and a lot of moisture can go through ele...
  • HOW CAN I STOP CONDENSATION ON THE FLOOR HEADER BEHIND INSULATION?

    When fiberglass is pushed up into the space between the floor joists around the perimeter of the basement, condensation often builds up on the wood behind the fiberglass. This can be stopped by the addition of an air barrier -- as simple as Kraft paper or as complex as caulked polystyrene. In p...
  • Heaters for Patio Doors

    Patio doors are actually very large windows and even when the weather-stripping and caulking is in good shape, they can create cold drafts in a room simply because there is so much cold glass that the air at the top begins to cool off, slides down along the glass getting cooler and cooler as it g...
  • HOW DO I GET MY PLANNED-HOLE-HIGH-IN-THE-HOUSE?

    The best household ventilation system is a constant operation fan powered balanced air-change system -- a central system that sucks stale air out an exhaust duct and blows an almost equal amount of fresh air into the house through an intake duct. These systems will usually require a heater o...
  • Condensation at wall to ceiling joint

    Mould at the wall to ceiling joint, particularly in a cool bedroom or a closet, may not indicate water leakage at all from above. It can be a very cold part of the wall simply collecting moisture from the air in the house. This kind of condensation can easily feed mould growth.One solution is t...
  • How far down should you insulate on a basement wall?

    As you can see in the first graphic, the soil helps to insulate a basement so there is more heat lost on the top of the basement than on the bottom. That is why the National Building Code requires a minimum level of insulation in a basement that reaches from the floor boards above your head, down...
  • How to close off a chimney temporarily

    Jacqueline from Red Deer Alberta is trying to figure out how to close up her chimney between periods of using the fireplace, given that her damper is burned out and very difficult to replace. Closing off the top of the chimney There are dampers that go on the top of the chimney and are pulled t...