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How to Install a Replacement Window in a Masonry Frame

  • Transcript

    LESLIE: Mario in Iowa is on the line with a window question. What can we do for you?

    MARIO: I have a frame and obviously, it’s a rectangle. But the top side of that rectangle on the existing frame of the masonry in the bedroom, it’s metal. It’s a metal bar. And I’m replacing my old window with a [Glass Works] (ph) preassembled window.

    TOM: OK.

    MARIO: And the mortar – the manufacturer of the mortar, I contacted them and they say that mortar does not adhere to metal. So, I am going to have a gap between the top side metal bar and the window at about a ½-inch. And I’m curious what your recommendation is: whether I should just seal it or actually try to find some material to bond it, not just seal it.

    TOM: So, the gap is going to be on the top or the bottom? What about the sides?

    MARIO: The sides are OK because they’re masonry; they’re cement. So that’s not a concern. It’s some sort of – there was some sort of reinforcing bar put into the top of the frame, I assume, for some structural reason. So that’s my only real concern. The other three sides are masonry and the mortar works fine there.

    TOM: Is this the kind of thing that maybe you could use pressure-treated lumber – a ½-inch piece of – a ½-inch-thick piece of, say, pressure-treated lumber/plywood or pressure-treated plywood as a shim?

    MARIO: Yes, I would think so, yes.

    TOM: Yeah, because I think that’s what I would probably use, something like that. Because you want to basically close down the opening so that the window can be secured. And you could attach the pressure-treated lumber to the old masonry opening and then attach the window to that.

    MARIO: OK. That’s a very good suggestion. Thank you very much.

    TOM: Good luck with that project. Thanks so much for calling us at 888-MONEY-PIT.

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