If I know for a fact that I'm dealing with Hollow concrete block or similar, I will definitely prefer toggle bolts. Tapcons also work but toggles will always be more secure even though they require a lot more Drilling

You can probably rent a hammer drill from your local hardware store and they may even include the appropriately sized masonry bit to make the hole.

And I said gable vent too. A gable vent requires a supply whether it is an open door, box vent, soffit vent, ridge vent, or gable vent on the other end. Have I covered everything?

Walls are fine! It’s from when the darts have hit the wire and bounced back out

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right, but OP said gable vent, not box vent.

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Thank you both. Going to drill out some soffit vents (wood trim) and put in the gable vent. Probably looking at a new roof in the next two years anyway, so just trying to get things going in the right direction. No pun intended.

Put two in the attic in my old house for HVAC, it set the one at 120ish and seemed to run nonstop from June-October.

Yeah, would work for engineered hardwoods.

Toggle bolts for this. https://www.lowes.com/pd/TOGGLER-10-Pack-Assorted-Length-x-1-4-in-Dia-Toggle-Bolt-Drywall-Anchor-Screws-Included/3183831 Yes, they work in concrete as well.

Box vents are on the surface of the roof.

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I'd imagine it depends on how the garage is oriented. You're right that only one vent fan won't work as it needs to pull air from somewhere. Typically a house with gable vents would have one at each end of the house. I'd look to go that route if the garage is situated like that.

I'm not sure what you mean about dealing with shingles, though. Gable vents are in the peak of the end wall, not on the roof.

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Thanks for sharing your observations. I’m happy to hear that it’s held up well (my primary concern). I do like the appearance because I have a relatively thin 1/8” grout line and I used their Ultracolor FA (fine aggregate) which to me looks nice without the coarse sanded grout (do not like that appearance).

If you keep the door closed, the vent fan won't move much air unless you cut some soffit vents or box vents down low. With the soffit vents you don't have to deal with shingles.

There's a colored caulk type product for floors in flooring section of lowes.

Also you could use furniture wax, minwax lacquer, or oil finish to treat the wood, it will dry out and crack otherwise.

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It can't prevent cavities, but it can fill them.

I was thinking of a different type of floor

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The laminate is basically a sticker on top of engineered wood, you can't really fix it, its gonna look like poop.

If this was a rental and I found it as your landlord, I would charge you to fix it, since it was negligence.