How do you handle the dirty work: DIY or call in the pros?

Moisture meters are great, but sometimes my nose is the best tool I’ve got... If it smells funky, time to call in the cavalry.

That’s basically my approach too - my wallet stays closed unless something really sets off the “uh-oh” alarm. But honestly, I’ve found that the line between “DIY-able” and “call the pros” is pretty fuzzy, especially when you’re trying to keep costs down. Like, I’ve patched drywall and replaced baseboards after a small leak, but as soon as there’s any hint of mold, I don’t mess around. The cost of getting it wrong just isn’t worth it.

Here’s what gets me: some folks swear by just painting over stains or using those mold sprays from the hardware store. But does that actually solve anything long-term? I’m not convinced. Even after reading a ton online, I still wonder where to draw the line. Is there a rule of thumb you use - like square footage, or how bad the smell is - before you decide it’s time to bring in a pro? Or is it just a gut feeling?

Honestly, painting over stains is just putting lipstick on a pig - never seen it hold up long term. I usually use the “bigger than a pizza box” rule: if damage is smaller than that and there’s no musty smell, I’ll tackle it. But once you get that funky odor or the spot keeps coming back, I’m out. Ever tried those mold test kits? I’ve thought about it but not sure if they’re worth the hassle...

I get what you’re saying, but I’ve actually had a few spots where painting over stains (with the right primer, like Kilz or BIN) did the trick for a couple years - no reappearing marks, no issues. Maybe it depends on how deep the stain goes? As for those mold test kits, I tried one once and honestly, it gave me more questions than answers. The results just seemed vague. Ever just cut out the bad section instead of messing around with tests? Sometimes feels quicker.

Cutting out the bad section is usually my go-to, especially if the stain looks like it’s got some depth or there’s a whiff of mustiness. Paint and primer can work wonders for surface stuff, but if you’ve got that classic yellow-brown “mystery” stain creeping back or spreading, there’s probably something funky happening behind the scenes. I’ve seen folks slap on Kilz and call it a day, only to have the same spot bubble up six months later.

Those mold test kits...yeah, mixed bag. Half the time they just tell you “something’s growing,” but not if it’s the dangerous kind or just your average dust bunny. If I’m dealing with drywall and it’s soft or crumbly, I just cut out a chunk (doesn’t have to be pretty), check what’s behind, and patch it up. Way less guesswork. Plus, you get to wield a utility knife, which is always a bonus in my book.

If it’s a small area, DIY is fine. But if you find black mold or the framing’s mushy, that’s when I start thinking about calling in backup. No shame in knowing your limits - sometimes the pros have the right gear for the gnarly stuff.

Cutting out the damaged section is definitely the most thorough way to handle it, especially if you’re concerned about what’s lurking behind the stain. I agree with this:

Paint and primer can work wonders for surface stuff, but if you’ve got that classic yellow-brown “mystery” stain creeping back or spreading, there’s probably something funky happening behind the scenes.

I’d just add that if you’re going to open up a wall, it’s worth taking a moment to check for any signs of leaks or condensation issues. Sometimes the root cause is a slow pipe drip or poor ventilation, and patching without addressing that just sets up a repeat performance.

On the eco side, I try to minimize waste by only removing as much drywall as needed, and I look for low-VOC patching compounds and paints. If you do end up with mold, vinegar or hydrogen peroxide can be effective for small spots, but I’m with you - if it’s black mold or the wood feels soft, it’s time to call someone with the right safety gear. No sense risking your health over a patch job.

And yeah, wielding a utility knife is oddly satisfying... just don’t get too carried away or you’ll be patching more than you planned.