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...
A fresh look at household wiring may change the wire sizes we use in some residential lines.
The electrical code establishes wire sizes based on fire safety considerations. When an electrical load is run through a wire, the resistance in that wire creates heat. The maximum amperage for a given w...
Every few years I need to update this "innovations" entry as things just keep getting better. Not all "gadgets" to save water work, and not all toilets actually flush clean. For details on the comparative performance of low flow toilets that do work, check out the MaP rating system, which is be...
Follow this link for a background and an overview of the debate on EMF and human health.
The debate is strong in Québec. A large group of scientist and engineers worried about what they consider the unfounded public outcry against wireless progress published a letter in the newspaper LeDevoir o...
Adding water to concrete or masonry will definitely make it flow better and make it easier to work with, which is why just about everybody does it. At the same time you have all heard that this will weaken the final product and increase shrinkage, but just about everybody does it anyway. If the d...
Here's an introduction to a special kind of exhaust fan -- an "In-Line" fan. This means that rather than having the motor right at the ceiling, they can be placed anywhere along the line of the ductwork. This makes their installation much more flexible, and quieter. Equipment details can be f...
Pollutants come from four main sources:
1- Your body's metabolic activities (breathing and the like): carbon dioxide, ammonia, organics, and odours.
2- Your activities within the house:
-- Tobacco smoke: carbon monoxide, nitrogen dioxide, organics, odours.
-- Aerosol sprays: fluorocarbons, v...
Note: There is one important exception to all the pollution control described below. The Montreal by-law states: "Authorizing the use of all solid fuel-burning devices during electricity outages that last more than three hours." (but you must keep your fireplace and chimney clean and in good ...
No de-icer is perfectly safe for concrete. Why? Because you are melting ice while the general temperature is below zero, allowing both water and some kind of chemical to flow into the concrete itself and refreeze shortly after. De-icers should not be used on new concrete -- wait until it is at le...
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Update Dec. 2019: The US Supreme Court just rejected an appeal of a lower court decision maintaining the legality of the city of Berkely, California’s ordinance passed in May of 2015 obliging all retail seller...
