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!

Comments

mos87 OP t1_iujw3nr wrote on October 31, 2022 at 9:53 PM

#407,026

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

M0U53YBE94 t1_iujxneu wrote on October 31, 2022 at 10:05 PM

#407,736

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.

guy_n_cognito_tu t1_iujy5yx wrote on October 31, 2022 at 10:09 PM

#407,981

Vent the room, then paint. Pretty simple.

mos87 OP t1_iujylqr wrote on October 31, 2022 at 10:13 PM

#408,184

Replying to guy_n_cognito_tu (#407,981)

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

mos87 OP t1_iujyp20 wrote on October 31, 2022 at 10:13 PM

#408,220

Replying to M0U53YBE94 (#407,736)

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

mos87 OP t1_iujyulc wrote on October 31, 2022 at 10:14 PM

#408,294

Replying to mos87 (#408,184)

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

guy_n_cognito_tu t1_iujz4jq wrote on October 31, 2022 at 10:17 PM

#408,434

Replying to mos87 (#408,294)

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

mos87 OP t1_iuk0d8w wrote on October 31, 2022 at 10:26 PM

#409,008

Replying to guy_n_cognito_tu (#408,434)

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?

kittenrice t1_iuk4963 wrote on October 31, 2022 at 10:57 PM

#411,058

Replying to mos87 (#408,294)

You can't tie it back?

How are you getting in?

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

Bldaz t1_iuka3ey wrote on October 31, 2022 at 11:44 PM

#414,530

Replying to guy_n_cognito_tu (#407,981)

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

ilikefluffydogs t1_iukapzs wrote on October 31, 2022 at 11:49 PM

#414,947

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.