Roxul International is a company that makes all kinds of commercial and residential insulation for energy conservation, sound reduction and fire control out of molten rocks. They call it rock wool. They have two plants in Canada serving all of North America.
Roxul is one of those companies that'...
It's become very important to understand the difference between a vapor barrier and an air barrier.
If we completely seal a polyethylene sheet on the warm side of the insulation, we call it a combined air/vapor barrier.
But it's possible to put the vapor barrier on the warm side of the insulati...
Back in the early 1980's there existed some fairly simple tables to guide homeowners in determining the insulation levels that they might want to put into the various parts of their houses. We had tables for standard houses, for energy efficient houses, super insulated houses and even for trying ...
Hello Jon,
I have a cathedral ceiling with a shingled roof. If I insulate the roof air tight, will the shingles lift and curl as they do on poorly ventilated roofs?
The other thought is leaving an 1 1/2 inch space between the roof deck and the insulation and installing a ridge vent, which give...
When there is morning frost or light snow on a roof, you can learn a lot about a heat losses from the house and how to eliminate ice dams and icicles.
What causes problems
Melting the bottom of a snow pack or melting off all snow at the crown of the roof sends water down under the snow to ...
There are several non-destructive ways that we can see what is going on inside the walls, ceilings and roofs of our homes. Simply watching the melting patterns of a light snow on the roof will tell you where you have insulation and where you have heat losses. In the first photo this was an unheat...
The reality is that there is not just one good way to install windows, but there are certain principles that must be taken care of with any installation to prevent cold air or water leakage later.
Basically a window installation must shed most of the water with the siding, what does get through ...
Hello Jon
I am the chairman of a church committee with the task of raising money, and doing the admin. for the restoration at St Andrew United.
My concern now is the proper procedure to fully insulate the Church. I am alright with the Attic as well as the crawl space, however I am pondering the...
Frost Protected Shallow Foundations
The foundation for a house is generally poured below the soil grade level so that the footing itself is well below the frost depth for any given region and soil type. This protects the house from frost heaving caused by expanding soils beneath the foundation....
Gerry is reshingling an open beam low sloped roof that has always given him problems with ice dams. He wants to know if it is worth it to tear up the first four feet, install air sheets and replace the boards?
Actually it is a great idea to perfect the over-the-wall section of the roof space any...
