Concrete slabs and humidity

[Therrion]

As the title says, I have a sealed grow room on a concrete slab. I use a quest 105 commercial dehumidifier and recently introduced 50 pint/day floor unit as well. I can't get my humidity below 45% no matter what I do . I have a combined 20' x 12' split between a flower and veg room that swaps air. My actual grow space 2 x (4' x 8') flow tables. I live in an area that gets plenty of rain, My question is, How permeable is concrete to moisture as far as it seeping through and keeping my humidity high? They are painted with a shitty white gloss that are already flaking. Would a concrete sealer fix this issue? My combined plants consume about 22 gallons of water a day. Maybe I just need a way bigger dehumidifier due to all that transpiration?

 

[SmoknKush420]

Why would u want it lower than 45%? Thats perfect for flowering 70% in veg. But yeah ud need a bigger dehumidifer if you really want it lower

 

[Johiem]

45% or lower should only be for drying, even curing is done at 60-65%

 

[Therrion]

Why would u want it lower than 45%? Thats perfect for flowering 70% in veg. But yeah ud need a bigger dehumidifer if you really want it lower

I drop the temps and humidity low the last few weeks and it keeps the buds tight, sticky, makes the colors pop, and insures zero bud rot.. If you think it hurts my yields , you should look at my bud factory.

 

[Therrion]

Now can somebody actually answer the question about concreate wicking water.

 

[thecosmicgoat]

Concrete is porous. Yes it wicks water.

 

[Grassizgreener]

Exhaust fan with damper on humidity controller will be your friend

 

[Gwhiliker]

could paint the concrete to try to seal it a bit maybe?

 

[xox]

concrete is indeed porous, however a concrete slab sits atop of crushed stoned generally speaking moisture coming through the slab would be next to zero. if your generally concerned about this my suggestion would be to apply a two part epoxy to seal the slab dont be a cheapo and get the one part those are junk. hope this helps answer your question.

 

[SupraSPL]

Yeap, new construction will often install a vapor barrier under the slab so basements can be finished more safely. If the soil under your slab is not soaked, then you probably arent getting a ton of humidity from the slab or the walls though.

BUT if you are cranking the dehumidifier that adds a lot of heat to the space, which I agree is unfriendly for bud quality, so you also need AC. AC will dehumidify on its own, but only down to about 55% in my experience then it seems to struggle a bit to get it lower.

I allow the flowering area between 60-80% during the warm/humid season but I agree if the buds are too big I have to keep an eye out for bud rot.

 

[SupraSPL]

Large dehumidifiers are much more efficient than small ones, so they will get the job done without adding nearly as much heat.

 

[OrganicBudz]

I drop the temps and humidity low the last few weeks and it keeps the buds tight, sticky, makes the colors pop, and insures zero bud rot.. If you think it hurts my yields , you should look at my bud factory.

Lmao.... okaaaaay then.

 

[Therrion]

Large dehumidifiers are much more efficient than small ones, so they will get the job done without adding nearly as much heat.

I dont know

Lmao.... okaaaaay then.

Don't leave some offhanded comment, say what the fuck you mean to say.

 

[SmoknKush420]

I dont know

Don't leave some offhanded comment, say what the fuck you mean to say.

Lmao ok bud. Keep with your stupid techniques.a simple google search woulda netted you the answer in 5 seconds

 

[OrganicBudz]

Lmao ok bud. Keep with your stupid techniques.a simple google search woulda netted you the answer in 5 seconds

100% and not only that but decides to be a rude little douche nugget

Not everyone has a brain. Seems like a tough keyboard warrior too lol

 

[Therrion]

100% and not only that but decides to be a rude little douche nugget

Not everyone has a brain. Seems like a tough keyboard warrior too lol

No, you were rude first and he still hasn't said what he's referring to.

 

[Therrion]

Lmao ok bud. Keep with your stupid techniques.a simple google search woulda netted you the answer in 5 seconds

Says the Aug 31, 2020 noob.

 

[OrganicBudz]

Says the Aug 31, 2020 noob.

If anyones a noob its obviously you . Youre the one asking questions here right? Stupid ones at that? Smoknkush is on thc talk for over 15 years.

 

[Therrion]

If anyones a noob its obviously you . Youre the one asking questions here right? Stupid ones at that? Smoknkush is on thc talk for over 15 years.

When you're done giving your buddy a reach around, maybe you guys can tell me which technique you are criticizing.

 

[OrganicBudz]

When you're done giving your buddy a reach around, maybe you guys can tell me which technique you are criticizing.

If you can't figure that out yourself you're on your own there. Pretty obvious