Humidity range to put on KILZ original (oil) indoor primer?

Submitted by mos87 t3_yiq3kc in DIY

Hi all,

Some advice would be much appreciated!

We took a lot of popcorn ceiling down and so we have the house in multiple layers of plastic and used water to keep the popcorn from dusting too much. Now, I don't have a hygrometer in there, but because of the setup of basically a plastic sweat suit with having used water on the inside, I think the humidity is pretty high. I want to prime all ceiling and walls with KILZ original oil based.

I'm unsure if I have to get the humidity down first, e.g., using a dehumidifier, or if KILZ original oil can be put on in let's say 80 RH just fine.

I can't find any good info online. I find things like: paint between 45 and 55 RH and not above 85RH, but then again primer isn't paint. so!?

The TDS of KILZ original has no recommended humidity range, which I found odd.

Some advice would be awesome. I figure if I need to I just stick a dehumidifier in.

Thanks!

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Comments

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guy_n_cognito_tu t1_iujy5yx wrote

Vent the room, then paint. Pretty simple.

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mos87 OP t1_iujylqr wrote

I want to keep the plastic up for now ideally and use it to catch any overspray, so, I'd like to keep unvented for now. I'm in full face respirator and will have a h13 hepa air purifier to help with fumes etc

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mos87 OP t1_iujyulc wrote

That being said, if there's no other way I'll vent first, but that would mean taking down a Lot of plastic and then redoing it

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guy_n_cognito_tu t1_iujz4jq wrote

Make there’s someone there to drag your limp body out…….

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mos87 OP t1_iuk0d8w wrote

Not sure why you think so, with a full face mask and cartridges that filter organic vapor and an additional hepa VOC filter on a good air purifier that should be doable?

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kittenrice t1_iuk4963 wrote

You can't tie it back?

How are you getting in?

Just tie back the opening and put a fan in it.

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Bldaz t1_iuka3ey wrote

Ditto what this guy said open up the plastic vent pull it back doorway windows

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mos87 OP t1_iujw3nr wrote

Just fyi, we had the popcorn tested, no asbestos.

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M0U53YBE94 t1_iujxneu wrote

Is the drywall physically dry? Obviously the less the humidity the better. But oil based paints dry differently from latex paints. Either way I'd dry the area as best as possible. And ventilate while using kilz. That stuff is rough in an enclosed area.

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mos87 OP t1_iujyp20 wrote

Drywall is physically dry, yes, but RH could still be 80-90 I guess?

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ilikefluffydogs t1_iukapzs wrote

My experience with painting/priming has universally been that the more ideal the conditions/preparations, the better the quality of the final result. So I would vent the room or use a dehumidifier or something to get the humidity down just in case. You don't want to prime everything and then have to redo it because you skipped a simple step.

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