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How tricky is it to make a window bigger?

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Posts: 23
(@sadams88)
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Matching the siding is honestly the part that gives me the most anxiety. I thought the framing would be the big challenge, but after I dealt with a stucco patch that never quite blended, I realized the outside can be just as tricky. Sometimes it’s not just color—texture and age make a huge difference, especially with older homes where siding isn’t even made anymore.

I’m with you on tossing old trim unless it’s got some character worth saving. Tried to salvage some 1920s casing once and it basically disintegrated in my hands... lesson learned.

Curious if anyone here has tackled a window enlargement in brick? I’ve only ever worked with wood or vinyl siding, and brick just seems like a whole different beast, especially when it comes to making everything look intentional after the fact. Did you find it worth all the extra headache?


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Posts: 17
(@dtail32)
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Enlarging a window in brick is a whole different animal, I’ll give you that. I’ve done it once—took out a tiny 1950s bathroom window and put in a bigger casement—and honestly, I’m still not sure if it was “worth it” in the sense of time vs. outcome. The inside work (framing, drywall, trim) was pretty straightforward. But outside? Matching the brick and mortar color, not to mention the bond pattern, turned into its own project.

Curious if anyone here has tackled a window enlargement in brick? I’ve only ever worked with wood or vinyl siding, and brick just seems like a whole different beast, especially when it comes to making everything look intentional after the fact.

Couldn’t agree more. With siding or even stucco you can fudge things a bit—patches blend better if you’re patient. Brick’s unforgiving. Even if you track down “matching” bricks from a salvage yard, age and weathering make them stick out for years. My patch job is finally looking less obvious after three winters, but for the first year or two it bugged me every time I walked past.

The actual demo wasn’t too bad—I used an angle grinder to score the lines and a hammer drill to knock out the bricks cleanly. The biggest surprise was how much dust gets everywhere; would 100% recommend tarping off the area and wearing real eye protection.

If you’re picky about appearances or live in an old house where details matter, it’s definitely more headache than vinyl or wood. On the other hand, if you’re okay with some “character” and don’t mind waiting for things to blend over time, it’s doable with patience. Honestly, I’d rate it as more satisfying than difficult...but only if you’re cool with imperfections.

Funny enough, I actually had better luck matching the mortar than the bricks themselves—turns out there are places that’ll custom mix mortar color for you if you bring them a sample. Didn’t know that until too late.

If I had to do it again? I’d probably still go for it—but maybe pick a spot less visible from the street next time...


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Posts: 14
(@retro_coco6135)
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- Honestly, if you prep right, matching brick isn’t always as rough as folks make it sound.
- There are some new tint kits out there—seen decent results aging fresh brick to blend faster.
- Demo’s messy, but if you score deep and use a rotary hammer, you’ll get cleaner lines.
- I’d argue the real pain is the lintel work. If you don’t get that right, you’re risking issues down the road, not just looks.
- For me, getting the structure solid matters more than a perfect match—most people walk by and never notice the patch after a season or two.


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debbieb30
Posts: 13
(@debbieb30)
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I get where you’re coming from—structure is king, no argument there. But I’d toss in that if you’re making a window bigger, it’s the perfect time to rethink insulation and air sealing around the new opening. Brick matching is one thing, but if you don’t get that thermal break sorted, you’ll end up with drafts and higher bills. I learned the hard way: looked great outside, but my living room felt like a wind tunnel all winter. Just saying, a little extra effort on the envelope now can save a lot of headaches (and cash) later.


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stormwoodworker
Posts: 19
(@stormwoodworker)
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That’s a solid reminder about insulation—honestly, I used to think that stuff was overhyped until I actually felt the cold coming through an old window. If you’re already opening up the wall, it’s worth double-checking the framing for gaps or weird spots where air can sneak in. I’d say don’t just rely on the spray foam around the window, either. I went back and added some rigid foam board before closing up, and it made a difference. It’s a bit more work, but yeah, you’ll feel it when winter hits.


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Posts: 15
(@julies31)
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I get the idea behind adding rigid foam, but honestly, in my case, it felt like overkill.

“I went back and added some rigid foam board before closing up, and it made a difference.”
I just used mineral wool and sealed up the edges carefully—it was way easier to work with and seemed to do the trick. I’m not sure the extra effort with foam is always worth it unless your walls are really drafty or you live somewhere super cold.


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Posts: 14
(@geocacher653246)
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That makes sense to me. I’ve used mineral wool too, and honestly, it’s so much easier to handle than foam—especially in tight spots around windows. I get why some folks swear by rigid foam, but unless you’re in a spot with brutal winters or crazy drafts, careful sealing with mineral wool seems plenty solid. Sometimes simpler is just fine.


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Posts: 38
(@jroberts86)
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Yeah, I hear you on the mineral wool. Last time I tried wrangling rigid foam around my old wood windows, it was like wrestling a stubborn mattress into a pillowcase—ended up with more foam dust in my hair than in the wall. Mineral wool just squishes right in, and if you mess up a cut, who cares? Plus, I’m not dealing with arctic winds here, so it’s plenty. Sometimes you just want to get things done without turning it into a science project.


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Posts: 11
(@finn_smith)
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You nailed it with the mineral wool. I see folks get hung up on “perfect” cuts or airtight everything, but honestly, if you’re not in a drafty old farmhouse in Maine, you can usually keep things simple. I’ve done plenty of jobs where we swapped out windows and made the opening bigger—sometimes it’s just about working smarter, not harder.

With mineral wool, you can squeeze it into odd spots around those window frames, and if you have to shave a bit off with a bread knife (my go-to tool for this stuff), no big deal. Rigid foam is fine if you want max R-value, but it’s messy and unforgiving in tight spaces. I’ve had to vacuum my shirt more than once after dealing with that stuff.

Don’t let anyone make you feel like every project has to be NASA-level precise. If the window fits, it’s square, and the insulation is snug—not crammed—you’re good. Sometimes “good enough” really is good enough, especially when you’ve got other projects waiting in line.


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film383
Posts: 12
(@film383)
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- You’re right—doesn’t have to be a science project every time.
- Mineral wool is forgiving, and honestly, a little gap here or there isn’t the end of the world if you’re not in an extreme climate.
- I’ve also used a serrated kitchen knife more than once... way easier than fighting with rigid foam.
- As long as your frame’s square and things are snug, you’re in good shape.
- Folks get too hung up on perfection—sometimes you just need to move on to the next job.


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