Triple pane windows will typically run $100 to $300 more than a comparable double pane window. Most installers are local window companies will be more than happy to quote out both the double pane window price and the equivalent triple pane price as well (assuming they offer TPWs).
The big question for consumers is whether this extra cost is worth the increase in energy efficiency. For most consumers the answer is probably no. However, for homeowners who live in very cold climates in which energy efficiency is an important component, triple pane windows may be a worthwhile investment.
TPWs have three panes of glass in the insulated glass unit as opposed to two. That's a simple an explanation as you can get. The result is a highly energy-efficient glass option for your home windows. At the outset, I will say that most consumers are going to be just fine with quality double pane windows. However, for those homeowners and consumers who want and/or need a more energy-efficient window, triple pane is about the best you can do.
There are two main types of triple pane windows. The first uses a frame that has a very similar depth to a normal double pane window. In this case, the third pane of glass is slid in between the two panes. This is the cheaper, but less effective triple pane option.
The second option uses a deeper frame in which the distance between the inner and outer frame in the middle frame is wider, which provides for better sound control. This approach will be more expensive but obviously more effective as well. Consumers can either ask about which method their triple pane window offers, or can ask for the performance numbers, which should be a good indication of which method is in place.
Highly effective triple pane windows can achieve an R-value of 3 and a U factor as low as .17. Both of these are window ratings that measure the insulating qualities of a window, specifically how much heat is allowed to enter through the window opening. As a basis of comparison, a high-quality double pane window will have an R value of 2 and a U factor of .27. A single pane window will have a U-factor somewhere in the neighborhood of .52 (although typically these work in conjunction with existing windows).
I recently got a bid on 23 windows in all and it include a half circle and four rather large fixed frames.
Pella Impervia Triple Paned: $35K
Pella Impervia Double Paned: $42K
Jim - Homeowner - November, 2023
Jim, $300 a piece to go from double to triple paned. Nah, not worth the expense.
Editor John - November, 2023
Just received a bid on the Okna 500 Deluxe series. This would be for 26 double-hungs, 3 Half Rounds and all in TP glass. This is for new construction installation and includes colonial style grids and some indoor trim work and extension jambs. Some of the openings measure 28 by 62. Total bid price was $27,640.
Janice - Homeowner - August, 2023
12 Single Hung
Sizes: Normal Sized
Bid Price: $15k
Included All
Location: Spring, TX
Year: 2022