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Fusion-weld

A term used for a type of corner construction, used with vinyl and other types of windows and doors, in which a small amount of material on the ends of two pieces are melted or softened, then pushed together to form a single piece. This also is referred to simply as a welded corner.

What windows do you like the best?

Which kind of windows would you prefer If you were going to replace the old ones in your house or apartment?