How I spotted a shady window installer (and what tipped me off)

If I’d just replaced the windows, I’d have been out a ton of money with the same chilly living room.

That’s the trap so many people fall into - thinking windows alone solve everything. Air sealing around rim joists and attic hatches usually gives folks way more bang for their buck. As for those foam outlet gaskets, I’ve seen them help a bit in older homes with no insulation in the walls, but in newer construction they’re mostly peace of mind. Still, for a couple bucks, why not? Just don’t expect miracles.

Yeah, I’ve seen folks get sold on the “just swap the windows” pitch, but unless you’ve got single panes from the 60s, it rarely fixes drafts by itself. I did a blower door test before and after sealing up my rim joists - huge difference in comfort. Windows can help, but air leaks are sneaky. Those foam gaskets are cheap insurance, but like you said, not a game changer unless your walls are basically empty. Sometimes it’s the boring stuff that really works...

You nailed it - air leaks are the sneakiest culprit. I’ve had folks call me convinced their draft was all about “bad windows,” but after poking around, it’s usually rim joists, outlets, or that weird gap behind the trim. Swapping windows is flashy, but sealing up those hidden spots? That’s the stuff that actually makes you comfy. Funny how the unglamorous fixes pay off the most...

I get the appeal of new windows - sales guys make it sound like a magic fix. But I’ve found that if you just walk around with a candle or even your hand on a windy day, you’ll feel way more leaks from the baseboards and old outlets than from the glass itself. Ever tried one of those thermal cameras? I borrowed one once and was shocked how much heat was leaking around my attic hatch. Curious if you noticed any spots that surprised you, or was it mostly what you expected?

Yeah, I totally get where you’re coming from. The window pitch is so convincing until you start poking around your house on a cold day. I did the candle test too, and honestly, most of my drafts weren’t even near the windows - they were sneaking in around the baseboards and especially those old outlets on exterior walls. It’s wild how much air can come through what looks like a solid wall.

I picked up one of those cheap thermal cameras that attaches to your phone (the Seek one, not FLIR - couldn’t justify the price) and it was kind of eye-opening. My expectations were mostly about the windows, but nope… biggest surprise was actually the gap around my crawlspace access door. It looked sealed but on the camera, it was basically a blue rectangle in a sea of orange. Also found a cold spot running along the top edge of my living room wall - turns out there was almost no insulation above that section. Never would’ve guessed without seeing it.

I’m with you on attic hatches too. Mine’s just a thin piece of plywood with zero weatherstripping, so it’s basically an open invitation for heat to escape. Tossed some foam tape up there and it made a noticeable difference (at least according to my heating bill).

Honestly, after all this, I’m way more interested in sealing up little leaks than dropping thousands on new windows right away. Not saying new windows don’t help at all - just seems like air sealing gives you more bang for your buck if your frames and glass aren’t totally shot.

Kind of funny how all the “magic fixes” are usually just boring stuff like caulk and foam gaskets… but hey, at least it’s cheap and something you can do yourself without hiring anyone sketchy.

- You nailed it - air leaks are sneaky and rarely just windows.
- Outlets, baseboards, attic hatches, crawlspace doors... all common culprits.
- Cheap thermal cams are underrated for spotting problems - way easier than guessing.
- Most people don’t realize how much heat loss is from poor air sealing, not just bad glass.
- I’ve seen folks spend big on windows, then still complain about drafts because they skipped the basics.
- Caulk, foam, and weatherstripping aren’t glamorous, but they work.
- If the window frames and glass are still in good shape, hold off on replacements unless you’ve sealed everything else first.

That’s spot on about skipping the basics. I actually had a guy try to sell me all new windows when the real issue was a draft from the attic hatch and a couple of outlets on exterior walls. Picked up a cheap thermal camera like you mentioned - turns out my old windows were fine, just needed some caulk and foam in less obvious spots. Saved me thousands and the house feels way tighter now. Sometimes it really is about the boring stuff first.

“Picked up a cheap thermal camera like you mentioned - turns out my old windows were fine, just needed some caulk and foam in less obvious spots. Saved me thousands and the house feels way tighter now.”

That right there is the kind of story I wish more folks heard before they get pressured into big-ticket window replacements. I’ve lost count of how many times I’ve been called in for a “window problem” that ended up being something like a leaky attic hatch or gaps around electrical boxes. Sometimes it’s even the siding or a bad weatherstrip on the door, not the windows at all.

I get why people jump to windows, though. Drafts make you think “old glass = bad,” and there’s a whole industry ready to sell you on that idea. But honestly, unless the frames are rotten or the glass is single-pane and falling out, most older windows can be made pretty efficient with some elbow grease and a few tubes of caulk. Not glamorous, but it works.

Funny thing - last winter I got called out to a 1920s bungalow where the owners were convinced their original wood windows were costing them a fortune. Turns out, the real culprit was a gaping hole behind their baseboard heater that went straight to the crawlspace. Plugged that up with some foam and suddenly their living room was ten degrees warmer. They were shocked. The windows? Just needed a little weatherstripping.

I’m not saying nobody should ever replace windows, but you nailed it: “Sometimes it really is about the boring stuff first.” It’s easy to overlook those hidden leaks because they’re not as obvious as foggy glass or rattling sashes. Glad you trusted your gut and double-checked with a thermal camera - that’s money well spent.

It’s wild how often the “simple” fixes get skipped because they don’t make anyone much money. But in my experience, those are the fixes that actually make your house more comfortable (and your wallet happier).

I’ve always wondered how many folks actually run a blower door test before jumping to window replacements. I did one a few years back and was surprised - most of my leaks were around the rim joist and, weirdly, my dryer vent. Anyone else find unexpected trouble spots when tracking down drafts?

Window replacement companies always push the idea that your old windows are the main culprit for drafts, but after moving into my place (built in ‘78), I was skeptical. I’d read a bit about blower door tests and decided to have one done before spending a dime on new windows. The results were honestly eye-opening... and not at all what I expected. Windows barely registered as a problem. Instead, the biggest air leaks were at the top plate in the attic and, weirdly, around the electrical outlets on exterior walls.

I also found a ton of air sneaking in through the basement rim joist - just like you mentioned. That was a total blind spot for me. Even the dryer vent had a pretty big gap around it, which made me wonder how much heat I’d been losing every winter. It’s kind of wild how much attention windows get when there are so many other “hidden” trouble spots that don’t even cross your mind until you do some testing.

When I did finally get quotes for window work, one installer tried to convince me that replacing every window would solve all my comfort problems. He didn’t even ask about insulation or other sources of air leakage, which seemed like a red flag. It made me think he was just after the sale, not actually interested in figuring out what my house needed. That whole experience pushed me to learn more about building science, and now I’m way more cautious about big-ticket upgrades.

I still haven’t replaced the windows, honestly. After sealing up the rim joist and adding gaskets to outlets, the house felt noticeably less drafty. Not perfect, but way better. Sometimes I wonder if people skip right to expensive fixes without checking those less obvious spots first.

This hits close to home. I’ve been called out to so many houses where folks have already dropped thousands on new windows, only to find out the real draft issues were coming from attic bypasses or, like you found, the rim joist. Drives me nuts when salespeople skip the basics and push full window replacement as a cure-all. Not to say windows never matter, but honestly, I’ve seen 40-year-old originals outperform shoddy new installs if the rest of the envelope is ignored. A little detective work goes a long way before dropping serious cash.

Totally get what you mean. I had a guy try to sell me on all new windows last winter - kept talking about “energy savings” but never even glanced at my attic hatch or the gaps around my basement. Ended up sealing the rim joist myself with some spray foam and weatherstripping, and the drafts basically disappeared. Wild how much those little spots matter compared to dropping big bucks on windows right away.

Wild how much those little spots matter compared to dropping big bucks on windows right away.

Couldn’t agree more. People act like new windows are a magic bullet, but honestly, half the drafts in my place were from the attic pull-down and the old dryer vent. I spent maybe $60 on foam and caulk and it made a way bigger difference than what a fancy window would’ve done. Not saying new windows don’t help, but you gotta plug the obvious holes first or it’s just money down the drain.

That’s spot on. I’ve owned my place for 20+ years and honestly, air leaks have almost never been about the windows themselves. The installer I almost hired didn’t even look at the attic hatch or rim joists - just went straight for the upsell. Here’s what’s worked for me: I do a slow walk around with a candle on a breezy day (old trick), then hit the gaps with backer rod and foam. Windows only made a real difference after I’d sealed everything else. Sometimes it’s the $5 tube of caulk that saves you the most.

That candle trick is classic - I tried it once and almost set my sleeve on fire, but hey, it works. Funny thing, I spent a fortune on fancy “energy efficient” windows before realizing my crawl space vents were basically wide open. Ever try one of those IR thermometers? I geeked out mapping cold spots... half of them weren’t even near a window. Makes you wonder how many people get talked into replacements they don’t need.

Those IR thermometers are surprisingly eye-opening, right? I grabbed one after moving in and was honestly shocked - most of my cold drafts came from an old attic hatch and the electrical outlets, not the windows like I’d assumed. The window sales guy tried really hard to convince me every pane needed replacing, but after mapping out the temps myself, it just didn’t add up. Makes me a bit wary of any “one size fits all” recommendations... There’s always more going on than you think.

Makes me a bit wary of any “one size fits all” recommendations... There’s always more going on than you think.

That’s really the heart of it. I’ve had folks try to sell me on new windows too, but when I actually checked with an IR thermometer, the real cold spots were baseboards and some ancient wall vents - not the glass. Sometimes those sales pitches are more about commission than what your house actually needs. It’s wild how a $20 tool can save you thousands if you’re willing to poke around a bit.

That’s a smart move with the IR thermometer. I see a lot of people blaming their windows when the real culprits are often gaps around trim, old outlets, or even attic insulation. Windows do matter, but it’s rarely just one thing. Good diagnostics beat blanket upgrades every time.

Good diagnostics beat blanket upgrades every time.

That’s been my experience too. I remember when we first moved in, I was convinced our drafty living room was all about the windows - old single panes, looked rough. But after getting an IR thermometer (honestly, one of my better $30 purchases), I started poking around. Turns out, the coldest spots were actually around the baseboards and a couple of outlets. The windows weren’t great, but the real issue was gaps in the trim and some missing insulation behind the walls.

Step by step, I sealed up the outlets with those foam gaskets, added some caulk around the trim, and only then did I bother with window film for the winter. The difference was noticeable, but replacing the windows would’ve cost thousands and probably wouldn’t have fixed the real problem.

I guess what I’m saying is, sometimes it’s easy to get tunnel vision and blame the obvious stuff. Those little leaks add up. Anyone else ever pull off a baseboard and find a straight shot to the outside? Kinda wild how much gets missed in older homes.