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Found 19 results for the keyword ‘Testing’

  • Can I paint over lead based painted walls?

    Yes Wendy, just as you can paint over any other painted walls. You can paint with an oil based paint directly over the lead based paint (which will certainly be an oil based paint). If you want to use a latex over it, then you must first use a "super adherent primer", made by most of the paint ...
  • OVERVIEW:Improper exhaust fans can pollute your home -- could even kill you

    More and more people are asking for powerful kitchen range hoods or bathroom exhaust fans. The logic appears simple, increase the power of the exhaust fan and get rid of pollutants quicker. In more and more modern homes which have been weather-stripped and sealed against cold air leaks and heat l...
  • How to find where leaks enter the wall.

    A caller from Ontario has a leak that keep's coming in through the wall despite the efforts of two contractors. It is often very difficult to find the place where water gets into the wall, when it is not something obvious like a crack in the caulking around a window. You need to make a careful i...
  • Calibrating your Hygrometer

    Yes you can check if your hygrometer or humidistat is giving you the right readings. Mix into a glass, one part water to two parts salt -- like 1/4 cup water to 1/2 cup salt. Mix it thoroughly. Now put this glass and the hygrometer into a sealed plastic bag at 22 degrees C, room temperature. Wait...
  • What is Radon and should I be worried?

    The basic message to remember is that Radon is a dangerous cancer causing gas and if found to exist in high concentrations in your house the problem can be solved permenantly and at a reasonable cost.  So we don't want to ignore the possibility, we need to test every house in Canada. 7% of homes...
  • Overview: Vermiculite, Zonolite, Asbestos and your health

    Note 2014 : As you read below you will find a detailed history of Vermiculite insulation and problems it had starting in 1920.  Just recently I have become aware of houses built around or before 1920, yes 100 year old houses, where it was discovered that there was about 2 inches of Vermiculite u...
  • Foundation settling

    Our camera caught up with Alfred at the renovation centre and he says that he has cracks in the concrete and in the plaster. What to do? The important first step is to which one of three possibilities apply to Alfred's house: It moved once, cracked and is not moving any more; the cracks are caus...
  • Which Paint Is It - Latex or Oil?

    Determining, definitively, whether a given paint was oil or latex has always been a bit of a problem, but an important one as you can paint oil over latex, but not latex over oil unless you use a special 'super adherent primer' first. I used to recommend taking a bit of paint thinner on a clean ...
  • Softening water -- do electronic water softeners work?

    John from Halifax wrote in asking about replacing his salt based water softener with an electronic water softener to make it easier to water his lawn.   Note 2020: I originally wrote this article in 2004 and many products have come and gone since then.  I recently received several requests to l...