Demystifying Energy Improvements

If you look out your window in the morning and see this on the neighbor’s roof, you know something is not quite up to par with their home’s energy efficiency.

Besides causing you to wonder if your own roof has tell-tale spots (you may want to put on your robe and take a look while the frost is still on the roof, or better yet, ask your neighbor what they can see over their morning cup of coffee), signs like these reveal the lack of knowledge that homeowners, and even many builders, have in regards to performance expectations.

The dark spots on the left side of this picture reveal areas where heat from inside the house has escaped to melt the frost off the shingles. This is concerning for three reasons. The first is the potential of ice damming and the resulting damage. The second is the transfer of heat to the outdoors, which reduces efficiency and increases utility bills. The third, and possibly most concerning, is the evidence that for this home, energy efficiency may have been an afterthought, and along with the keys, the homeowners may have purchased an abundance of missed opportunities and unrealized potential savings.

Last week, I (Cara) crawled into an attic with Anthony as he taught some local maintenance technicians how to make their apartments more efficient. Going into the project, I thought I knew a fair amount about building with efficiency in mind. What I learned, however, is unless efficiency is a priority of the builder, it simply does not exist. The spots on the roof should not be there. They are easily preventable, and planning their prevention, or in this case, their correction, is essential to a well performing structure.

Over the next few weeks, we will work to demystify energy efficiency. We will describe what the term means, the modern expectations for an energy efficient home, and how these expectations are realized.

Watch our upcoming blogs for hints on how to make your home more efficient, including a list of projects, some approximate costs, what improvements can give you the most bang for your buck, and advice on what you may or may not want to tackle on your own.

Condensation on Windows - What's the deal?

A friend of mine has a 1950's house in which cheap replacement inserts were installed. He asks,

"Hey Abe, I want to pick your brain a bit. We have vinyl double hung windows in our home now with storms on the outside. When the weather cools down, moisture and frost almost immediately appears...a few of the storms are cracked so we ended up removing them yesterday, and they appeared to be pretty snugly installed, somuch that I broke a couple of the windows during this process since they were cracked already.

I'm not sure if the brand of windows matters, but do believe they aren't very high quality. Not sure if purchasing new storms would help? Any ideas or suggestions for a cost effective solution would be greatly appreciated."

The cause & solution depends: Is the frost on the storm window or on the interior window? Frost will almost always appear on the storm window and it usually indicates that the interior window is working OK! That's because it is keeping the heat in the house and the storm window is the cold surface.

However, it can occasionally indicate a different problem which is leakage of humid air from the house outside. This is sometimes from the replacement windows themselves, and other times due to the fact that they are an "insert" and there is leakage around them. It is hard to say.

I generally recommend leaving the storm windows in place. If the frost is inside the house, that is a different problem for us to talk about. That is probably a problem with humidity levels inside the home, or, having window coverings left down too long, or, in the mild fall weather, a VERY inefficient window.

You can also have a Home Performance with ENERGY STAR test completed to help determine other sources of air leakage and heat loss, and that testing will evaluate the potential energy savings from window replacement as well.