replacement or new construction ????

Old 11-14-08, 08:50 AM
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replacement or new construction ????

we had the rough openings made and framed out; its a porch in the back of the house. does a new construction window need inside stops on the top,bottom and sides?
does it need stops on the outside as well?
what makes a new construction different aside from the nailing flange?
i know replacements are screwed in on the sides,are new construction screwed into the sides as well as the nail fin on the outside?
Old 11-14-08, 09:34 AM
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New construction fixes to the outside of the house, replacement to the inside of the existing frame. When removing a window to be replaced by a 'replacement' type window, you generally remove only the inside side and top trim, (not the stool), and the stops and associated pieces. You then cut the cords or unbolt the rods and remove the sashes.

The replacement window is then screwed into the exiting frame.

I have known people who have removed then entire window down to the rough, replaced the sill, installed the replacement window, then replaced both the exterior mold and interior trim.

Perhaps someone with more experience can better guide you but if you have the opportunity to use a new construction window you may be better off. Having said this, see my other post on some of the challenges I'm having and the solution we think we need.

Best of luck.
Old 11-14-08, 11:34 AM
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rough opening - new construction

If I understand your situation, you had a new window opening constructed (rough opening). New construction may be best for you since you probably have no trim inside or out. Replacement style windows utilize the existing trim without significant modification. New contruction requires trim both in and out. If you have a newly constructed opening then a new construction window sounds best.

When I had windows replaced on my house, I chose the new construction style. This was because the outside trim was wood which needed to be painted every few years and I was going to replace the interior trim anyway. Also, I did not care for the decrease in the size of the opening by using a replacement window. For these windows, the existing window frame is kept in place and a new window frame is inserted inside that opening. That effectively shrinks the window opening by a couple of inches on each side. I did not care for the smaller glass area or the visual effect of all that frame.

Also, many new construction windows can be ordered without the flange and inserted into the rough opening much like a replacement style window.
Old 11-14-08, 01:28 PM
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New construction windows are what you want, as easelpad says. I would not use replacement windows in a new framed opening, too many potential areas for leaking. In most cases one would determine which windows to use and frame using their rough opening dimensions. You may have to adjust your openings some so you do not have to order custom sizes. Be sure to flash properly and make sure to use metal flashing on top of the unit as well as putting tar paper over the vertical part of the flashing. House wrap itself is not sufficient.

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