Basement Slab Moisture

 
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Old 08-07-2017, 08:49 PM   #41
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Re: Basement Slab Moisture


I just pulled this tile tonight...we have had a very very wet summer.

Definitely will be doing test areas before redoing the whole floor.

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Old 08-07-2017, 08:50 PM   #42
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Re: Basement Slab Moisture


I've seen this method used with Pergo and sheet vinyl.
I've read about it being done with just about everything else.

http://www.greenbuildingadvisor.com/...ent_FHB169.pdf
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Old 08-07-2017, 09:14 PM   #43
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Re: Basement Slab Moisture


Waterproofers like Thoroseal and Xypex will work to control negative side water vapor ...as well as certain adhesives. DRIcore would be another solution.
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Old 08-07-2017, 09:19 PM   #44
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Re: Basement Slab Moisture


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Originally Posted by superseal View Post
Waterproofers like Thoroseal and Xypex will work to control negative side water vapor ...as well as certain adhesives. DRIcore would be another solution.
Hmm...never thought about Thoroseal...I have used it before on block for crawlspace walls. I can get that locally.

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Old 08-07-2017, 09:20 PM   #45
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Re: Basement Slab Moisture


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I just pulled this tile tonight...we have had a very very wet summer.

Definitely will be doing test areas before redoing the whole floor.

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The shiny transparent on the right side of pic - you saying that is water?
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Old 08-07-2017, 09:37 PM   #46
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Re: Basement Slab Moisture


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The shiny transparent on the right side of pic - you saying that is water?
Yes I believe so. As soon as I scrape the glue it starts to dry up. The floor area I removed yesterday has already dried/evaporated.

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Old 08-07-2017, 09:39 PM   #47
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Re: Basement Slab Moisture


That dark line on the left if where I Planipatched the saw cut. The glue was stuck more in that spot than anywhere else.

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Old 08-07-2017, 10:55 PM   #48
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Re: Basement Slab Moisture


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The shiny transparent on the right side of pic - you saying that is water?
Or maybe emulsified glue due to high moisture in the slab...??

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Old 08-08-2017, 12:00 AM   #49
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Re: Basement Slab Moisture


give these guys a call.

extremely knowledgeable and helpful.

great products also.

http://moxieshield.com/
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Old 08-20-2017, 05:07 PM   #50
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Re: Basement Slab Moisture


So I have been talking to several companies and looking at several products. Regardless of what product I go with all ate recommending mechanical abrasion of the slab to open up the pores and get rid of any old adhesive residue.

So since the prep is the same I still having a hard time choosing a product. MoxieShield and BoneDry are applied like a typical sealer with a low pressure sprayer. Cost ranges from $150-400.

Epoxy is an option as well. It would require 2 coats and cure time. Cost is around $400.

I post some pics and product choice when I get there.

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Old 08-25-2017, 06:25 PM   #51
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Re: Basement Slab Moisture


Here's some info we gathered for a project when we couldn't get the rh of the slab into spec in time for flooring.
Ardex MC under resilient flooring: (Max RH = 100%)
Shot blast floors: required

Chapco Defender under Carpet: (Max RH = 100%)
Shot Blast Floors: Not Required

Lok Dots: (Max RH = 95%)
Shot Blast Floors: Not Required

Elemix Option (not selected for this project)
Other special requirements: ???


I deleted all the pricing info on those because I don't think it's relevant. We had a much bigger floor.



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Old 08-30-2017, 09:27 PM   #52
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Re: Basement Slab Moisture


How much foot traffic do you have down there? The good thing about using an epoxy is that it'll hold up against traffic a lot better and longer than other options.
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Old 08-30-2017, 09:28 PM   #53
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Re: Basement Slab Moisture


Whatever you choose, I'm curious to see the results.
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Old 11-04-2017, 05:32 PM   #54
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Re: Basement Slab Moisture


Alright...finally time to get this done! I decided on the 2 part epoxy. No matter what system/sealer I chose, because I had glue residue and sealer on the slab, they all required surface prep. Epoxy moisture mitigation is very, very common in the commercial flooring world so I felt confident in that solution for myself.

I went with EliteCrete because my flooring guy also does epoxy floors with EliteCrete products. He let me rent his equipment for the prep and sold me their epoxy vapor barrier.

The Edco grinder and vac he has is awesome!! Zero dust...I mean zero! Makes quick work.

Here is the difference between the trowled floor and ground floor. This gets rid of the surface and provides grip and surface area for the epoxy to bind to.
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Old 11-04-2017, 05:34 PM   #55
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Re: Basement Slab Moisture


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How much foot traffic do you have down there? The good thing about using an epoxy is that it'll hold up against traffic a lot better and longer than other options.
I will be putting my vinyl floor back down.
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Old 11-05-2017, 02:54 PM   #56
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Re: Basement Slab Moisture


At some point, won't wise home owners quit fighting nature, and use floor coverings that reduce problems instead of creating more by collecting moisture that cools to liquid water at certain times, and ALWAYS feeds mold if prevented from mixing with less humid air......

At least you can bleach the vinyl annually to kill this years growth.
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Old 11-05-2017, 03:21 PM   #57
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Re: Basement Slab Moisture


My reaction is that the footing drain has blockages. Could be silt, or a broken footing drain. If the drains worked, you would not have water under your slab and thus the problem.
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Old 11-05-2017, 06:32 PM   #58
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Re: Basement Slab Moisture


Stilla, the OPer has water collecting from condensation of water vapour....

Without a unbroken vapour barrier under and around the sides of the Slab on washed rock... the vapour travel through the cracks and pore of the slab to the surface as water vapour ALWAYS goes to the lower humidity volume.... the Vinyl formed/ will form an almost impermeable layer that the out gassing water collects below.

basements need a "blue" line just as above ground roofs and walls do if they are inhabited without mold.

Water itself can travel over seven miles in the right sized cracks in rock/ sand media...

See the trees in Californication land that lift water over 400 feet from the water table to its leaves/needles.
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Old 11-05-2017, 06:45 PM   #59
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Re: Basement Slab Moisture


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At some point, won't wise home owners quit fighting nature, and use floor coverings that reduce problems instead of creating more by collecting moisture that cools to liquid water at certain times, and ALWAYS feeds mold if prevented from mixing with less humid air......

At least you can bleach the vinyl annually to kill this years growth.
There is no mold. Never has been. No mold on my walls any where. Moisture levels in the studs and drywall all below 10%...some at 6%. All footer tiles and sumps work. Water is right at the bottom of the tile where it should be. Simply a lack of or lack of a properly installed vapor barrier.
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Old 11-05-2017, 07:39 PM   #60
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Re: Basement Slab Moisture


4th Gen...do you disagree with my solution?

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