We’ve been following Matt Grocoff with Greenovation.TV as he tries to make his home the oldest net-zero energy house in America. Last time we talked to him, instead of replacing his windows, he was refurbishing the 110-year-old wood framed windows. Lester Graham checked to see just how well that worked.
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Repairing old windows
The old windows in Matt’s house were drafty, but he didn’t like the idea of all the resources, energy and cost that replacing the windows meant. He got some help and took them apart, got them working right, painted them, and sealed the window panes the gaps. Today is the big test.
Nick Helmoholdt with with the Clean Energy Coalition. He’s conducting a blower door test to see whether the Grocoff house is any tighter.
LG: “What kind of improvement did just refurbishing the old windows do for the house?”
NH: “Roughly two-thirds the air infiltration was reduced.”
LG: “Is this typical when you see a house just replace the windows?”
NH: “I have never seen this before. I am very impressed with the amount of leakage that was reduced from this repair. This is really, really impressive.”
So a 66-percent reduction in air infiltration by just fixing up the old windows.
Matt Grocoff is pretty happy.
MG: “I think it’s a lot better than new windows because we’ve proven you can make these old windows way more energy efficient and for a lot less money.”
LG: “But that’s not today’s project. Today’s project is putting these storm windows on which, I have to say, really look nice.”
MG: “It looks great! The house looks amazing right now, and especially in a historic district, putting a good storm window on is accepted by a lot of historic associations. The big bang for the buck that we’re going to get out of these storm windows is the Low-E glass that we have and a little bit of thermal insulation by creating a secondary glazing. What that means is that we have almost the equivelent of a dual-pane window.”
LG: “You mentioned Low-E glass. What’s that and what does it do?”
MG: “Low-E stands for low emissivity and what that means is that Low-E glass is just an invisible coating that keeps the heat from coming into your house and heating it up like a greenhouse. I can show you right here. If you put your hand here, we’ve got just a single pane up right now.”
LG: “Yeah, I can feel the sunshine coming through.”
MG: “And you can feel the sill, and you switch this up, pull the sill down with the Low-E glass, you can feel almost instantly how much cooler it is. You don’t get that greenhouse heat coming through.”
MG: “The other cool benefit is that it filters out all the UV light so it prevents your furniture from getting bleached and everything. We’ve got that red sofa over there facing a south wall. So, we could use all the help we can to help our furniture from fading.”
I don’t know about you, but when I think about storm windows, I think of those old bare aluminum windows that just weren’t all that attractive. Those days are past. Bill Trapp with the George W. Trapp Company supplied these new windows… and he says they come in a lot of colors to match paint schemes.
BT: “And we have people from all over the country calling us right now, getting storm windows in grey and red and green and all these different colors. And also, there are different levels of storm windows as well and I like to think we make the tightest one out there.”
LG: “Well, I can’t verify that, but they did pass the ole Matt Grocoff test, so Matt that’s the windows. Thanks, and I’ll talk to you on your next project on the house.”
MG: “Thank you, Lester, and here’s to staying cool.”
That’s Matt Grocoff with Greenovation.TV. I’m Lester Graham with The Environment Report.