Removing fins from new construction windows (is it a code violation)?

[ivwshane]

I know that it depends on the area but in general if you are creating a new window opening can you cut the fins?

[cabinetman]

When you say "fins" exactly what are you referring to?

[ivwshane]

I'm talking about the nail fins as seen in this pic here (the white band that goes all the way around the window):

[siliconbauhaus]

Why would you want to remove them mate, I would think it would be much more work to fit the frame in and secure it without them?

[Tom Slick]

your siding and trim should cover the nail flange.
what exactly is your plan with the window?


BTW I don't see any reason it would be against code.

[Hellrazor]

You can order windows with or without the nailing fins, so I do not see how it would matter. Some manufacturers make them easily removable, others do not.

[ivwshane]

The only reason I'd want to remove them is to have the window set back a little more.

I plan on having a 2x4 trim around the windows.

[Stytooner]

We have removed them before to set the window further back, but it is part of the seal around your window as well as a mounting flange. It's part of the low maintenance design.
I would suggest making the opening large enough to leave the tabs in place. Then use some 2 by's to shim the opening so you can still use the tabs to mount the window with.
Cutting them off will mean no solid mounting or at least difficult, and the judicious use of a compatible caulking.

[LarryG]

What Lee and most of the others said, basically.

If the window is rated for a certain wind load (i.e., for hurricanes in coastal areas), and you live in that area, then removing the fin might technically be a code violation. But the nailing fin is basically just there to speed installation. Many mfrs offer windows with fins for new construction, and windows without fins as replacements in existing construction; other than the fin, they're the same window.

[scorrpio]

Nailing flanges are often removed in order to set the window in a masonry wall. In those cases however, jamb clips are installed instead. Be sure the window is properly sealed and flashed.