Those of you who have been following my blog know I am big on-air sealing. That 10% to 40% of heating and cooling costs are due to air leaks statement I keep talking about. Air sealing does more than save money. Indoor air quality can be improved, building occupants are more comfortable, and durability of the structure is often better. Continue reading “Construction Materials-Aerobarrier”
All buildings that use a fossil fuel source for space or water heating, such as natural gas, liquid propane (lp), fuel oil or wood, have the risk of back drafting burned exhaust gasses into the structure.
Continue reading “The Energy Audit-Combution Appliance Zone (CAZ)”
Recessed lighting, sometimes called a recessed can or recessed luminaire has been a very popular lighting choice for many years. When I worked as an electrician, I installed thousands of this type of light fixture. Continue reading “Construction Materials-Recessed Lighting”
Last week we talked about interior moisture drive through the building shell, the vapor control layer. This week we will continue with the building shell layers discussion, number 4 on our list is the thermal barrier. Continue reading “Building Science-Building Shell Layers-Thermal Control Layer”
Last week we talked about the what makes a house “tight”, the air control layer. This week we will continue with the building shell layers discussion, number 3 on our list is the vapor control layer or vapor retarder.
Last week we talked about the outer most layer in a building, the rain control layer. This week, we will continue with the building shell layers discussion. The air control layer is next on the list. Continue reading “Building Science-Building Shell Layers-Air Control Layer”
The next four blog postings are all going to discuss a few of the most important parts of a building, the four layers in a building shell. I’m leaving out the “structural layer”, though it’s the most important part of a house, the other layers are less understood. Continue reading “Building Science-Building Shell Layers-Rain Control Layer”
As an energy auditor, I am often in homes because of high electrical bill complaints. Conducting electrical testing and calculating energy costs are part of my job. There is a formula for figuring these electrical costs. Continue reading “The Energy Audit-Ohms Law”
Today, we are going to have our first dedicated discussion about a specific building material, sheet insulation. I originally had this blog named Foam Insulation but changed the name because not all sheet insulations are a type of foam, there are a few non-foam products, one that I will discuss last. Continue reading “Construction Materials-Rigid Sheet Insulation”
In my last blog, I talked about vapor diffusion and the perm rating. Sometimes it is better to eliminate the polyethylene sheeting most builders in Minnesota are using for both the air and vapor barrier. The problem then becomes passing the blower door test. Continue reading “Building Science-Passing a Blower Door Test”