Window installation considerations
A flanged full-frame window has a nailing fin (or flange) that means it must be installed before the siding. This is easily done in a new construction project. In a replacement project, it can be done where it’s possible to peel back the siding or alternatively, where a buck can be built. A buck is a structurally sound frame that is built inside the rough opening, which is the hole in the wall where a window or door is installed.
A full-frame replacement window is one that fits inside an existing rough opening, after the old window and frame have been removed. This type of window doesn’t require removing siding or trim, so it’s less invasive than the installation of a flanged full-frame window.
An insert replacement window fits inside an existing window frame, so it’s the least disruptive window replacement option. Siding, trim, and the existing frame all remain. None of the finishing details that can add time, labor, and costs will be needed here.
Window replacement cost comparison
Flanged full-frame and flangeless full-frame windows will be more expensive than insert replacement windows. This is because insert replacement windows are the simplest window units from the perspective of materials and manufacturing. Keep in mind the window unit is only one aspect of pricing; the installation costs associated with flanged full-frame windows will be higher because of the finishing required to replace trim and siding.
Window energy efficiency
A flanged full-frame window is easiest to install in a way that ensures it performs as efficiently as intended. This is because of the nailing fin, which makes it easy to flash. This is how the window is connected with the control layers. Remember, this is how pros describe the systems put in place to keep outside elements out and inside air in.
This doesn’t mean the other options don’t offer energy efficiency. A full-frame replacement window is sealed on the exterior side when it's installed, and an insert replacement window relies on the existing systems for managing the elements.
If you have concerns about your existing windows leaking air, you will want to opt for a full-frame replacement window or a flanged full-frame window, as both options will give you the opportunity to install in a way that will improve energy efficiency, rather than relying on existing systems.
Aesthetic impact of windows
There are several different ways to think about the aesthetic impact of choosing one of these window options over another. Here are some questions to ask yourself:
- Are you replacing all your windows or only a few? If you are only replacing a few windows and don’t have firm plans to replace all windows, you might be best off using a replacement option that will allow you to keep your existing trim, so a full-frame or insert window.
- Do you have special trim in your home? If you live in a home with beautiful, traditional wood trim, you understandably might not want to lose this aspect of your home’s character. Either a full-frame or insert window will allow for the trim to be preserved.
- Do you want the most daylight possible? If so, you should be aware that insert replacement windows, by fitting inside the existing frame, will cut down somewhat on the amount of daylight inside your home.
The best way to decide on the right replacement option for your home will be to speak with a contractor who is experienced in window and door replacement. We can help you find a pro in your area who specializes in our products.
