Go Back   DIY Chatroom Home Improvement Forum > DIY Repair > General DIY Discussions

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 02-11-2012, 03:49 PM   #16
Member
 
Join Date: Jan 2012
Location: Pacific North west
Posts: 1,170
Share |
Default

Black mold on underside of plywood in addition....


Every home built has mold in it period. Ever frame up a house an it rained and got the wood wet? Well guess what that house now has mold in it. people over react to mold to much.

Nailbags is offline   Reply With Quote
Old 02-11-2012, 05:19 PM   #17
Member
 
Scottphys's Avatar
 
Join Date: Jun 2011
Posts: 33
Default

Black mold on underside of plywood in addition....


Quote:
Originally Posted by Maintenance 6

As far as the EPA, keep in mind that they are not an authority on killing mold. Their job is protecting the environment.
IMO they're not much of an authority on anything. Point well made Maintenance 6.
Regardless, I've found their mold info helpful.
Scottphys is offline   Reply With Quote
Old 02-11-2012, 05:30 PM   #18
Pro Flooring Installer
 
rusty baker's Avatar
 
Join Date: Feb 2009
Location: SW Missouri
Posts: 3,750
Default

Black mold on underside of plywood in addition....


Quote:
Originally Posted by Maintenance 6 View Post
The mold on shower curtains is living on soap scum. Soap is high in fatty acids which makes good mold food. When spores are dry they are easily dispersed. If you wet them before you scrub, it's not an issue.

As far as the EPA, keep in mind that they are not an authority on killing mold. Their job is protecting the environment.

There is a ton of mis-information on the interrnet about mold and health effects. Most is hype from "Magic Mold Potion" sellers trying to pitch some product that is basically a batch of chemicals you can find under your sink.
Just like asbestos and lead danger. Overblown.
__________________
The ads in my post are there without my permission. I do not endorse any of the products.
Semi-Retired Installer
Installing since 1973
rusty baker is offline   Reply With Quote
Old 02-11-2012, 05:43 PM   #19
Member
 
Join Date: Jan 2012
Posts: 393
Default

Black mold on underside of plywood in addition....


Quote:
Originally Posted by Nailbags View Post
Every home built has mold in it period.
This is totally false!
jasin is offline   Reply With Quote
Old 02-11-2012, 07:58 PM   #20
Member
 
Join Date: Jan 2012
Location: Pacific North west
Posts: 1,170
Default

Black mold on underside of plywood in addition....


Quote:
Originally Posted by jasin View Post
This is totally false!
If your going to quote me you better do it in full context and with formidable information. because During the farming job before it is dried in it will rain the wood will get wet. And it will cause mold to grow. Also all wood was a living organism and once it was felled it will start to rot Doug Fir and Hemlock have fungus naturally in the wood fibers that when wet will start the mold to activate. the sap in the wood has sugars in it that help break down the wood when the molds hit it. Would you like more scientific information or are you just going to miss quote me? Now unless you live in the dessert and have zero chances of precipitation then all the home built will have some form of mold in them. I have built homes in the driving rain and having to drill holes in the sub floor to let the water drain out. And I have gone back ad have seen the mold stains in the studs. It is not a problem just people over react to the "mold" it there and there is nothing to worry about.
Nailbags is offline   Reply With Quote
Old 02-11-2012, 09:17 PM   #21
Member
 
Scottphys's Avatar
 
Join Date: Jun 2011
Posts: 33
Default

Black mold on underside of plywood in addition....


I've read the same thing; that mold is everywhere. Even if it didn't rain on the construction, mold spores float around outside and could come inside. That's why when you do mold tests, they prefer an indoor sample and an outdoor sample as well.

The key to keep mold growth "at bay" is to maintain less than 55% relative humidity where mold won't be able to survive.

Like everything Preventative Maintenance is important.
Scottphys is offline   Reply With Quote
Old 02-11-2012, 11:20 PM   #22
Registered User
 
Join Date: Mar 2009
Posts: 9,968
Default

Black mold on underside of plywood in addition....


I've been researching bleach/mold. A few points:

Bleach will kill surface mold, but not ingrain mold in lumber because it is organic which inactivates bleach. http://www.toxic-black-mold-info.com/disinfectant.htm

http://www.spore-tech.com/viewCatego...?idCategory=78

Has anyone found any articles to show otherwise? I,d be interested in finding more information on the high-lighted comments above, Thanks, Gary
__________________
If any ads are present in my answer above, I do not condone/support/use the product or services listed, they are there against my permission.
Gary in WA is offline   Reply With Quote
Old 02-12-2012, 06:01 AM   #23
Member
 
Join Date: Jan 2012
Posts: 393
Default

Black mold on underside of plywood in addition....


Quote:
Originally Posted by Scottphys View Post
The key to keep mold growth "at bay" is to maintain less than 55% relative humidity where mold won't be able to survive.

Like everything Preventative Maintenance is important.
This is Correct.

Last edited by jasin; 02-12-2012 at 08:34 AM.
jasin is offline   Reply With Quote
Old 02-12-2012, 06:15 AM   #24
Mold!! Let's kill it!
 
Join Date: Feb 2008
Location: Central Pennsylvania
Posts: 2,830
Default

Black mold on underside of plywood in addition....


The info in the toxic black mold info link is pretty accurate, but you need to understand what "inactivated by organic matter" means. It means that as the compound does it's job it becomes weaker until it is ineffective. It has little residual "killing power". Would you really want a chemical residue to remain active after it's job is complete? I'm really surprised that alcohol is on the list, since it is never used as a remediation product. In fact alcohol is a by-product of the metabolism of more than one mold specie.

The Spore Tech site is another of the "Mold is Gold" sites out there. A grain of truth, but a lot of BS in between. Example: "OSHA is the first federal agency to announce a departure from the use of chlorine bleach in mold remediation." What does OSHA know or care about killing mold? Their interest is in NOT killing workers. (See previous post).

Here are some links from more reputable sources

http://accessscience.com/studycenter...uestionID=4918

http://www.jacionline.org/article/S0...083-1/abstract


Let me also add that unless you are totally familiar with them, you should NEVER use Glutaraldehydes for remediation.

If one reads the fine print on the mold remediation products sold, you'll find that all of them include disclaimers about deep seated mold in porous materials and that they offer no guarentees about their effectiveness. That includes some of the best fungicides out there.

Is bleach the absolute best product out there? No. Do I use it on remediation jobs? Somtimes. Depending on conditions. In highly sensitive places? Yes. It leaves very little in long term chemical residuals.

It is easy to use. Readily available and as effective as most other products. Everybody has a bottle in their laundry room. It is also easy to mis-use. Never exceed 10%.

Last edited by Maintenance 6; 02-12-2012 at 06:24 AM. Reason: added info
Maintenance 6 is offline   Reply With Quote
The Following User Says Thank You to Maintenance 6 For This Useful Post:
Gary in WA (02-12-2012)
Old 02-12-2012, 06:39 AM   #25
Mold!! Let's kill it!
 
Join Date: Feb 2008
Location: Central Pennsylvania
Posts: 2,830
Default

Black mold on underside of plywood in addition....


Quote:
Originally Posted by Nailbags View Post
Every home built has mold in it period. Ever frame up a house an it rained and got the wood wet? Well guess what that house now has mold in it. people over react to mold to much.
I totally agree with that. If you know where to look, you will find mold. Practically all mold on framing goes dormant after the structure is dried in and never resurfaces as a problem. There is also a ton of misleading information out there about "toxic mold". There is also a lot of misconceptions about mold spores. Mold spores are everywhere. Unless you are living in a clean room, the last breath you took included more than a few. I once saw a worker screw up an air clearance sample when he ate his lunch on a jobsite. He sprinkled ranch dressing on a salad near an air pump and drove the spore counts up. Want a real dose of spores, open a loaf of moldy bread in your kitchen. And bread molds produce some of the nastiest by-products. I never once heard of anyone who died from breathing moldy bread. That's not to say that it's safe to be exposed to overwhelming spore loads or mycotoxins, or to say that some molds don't produce really nasty things. After all, Anthrax is a mold by-product. Common molds in buildings don't make anything close to that.
Maintenance 6 is offline   Reply With Quote
Old 02-12-2012, 08:37 AM   #26
Member
 
Join Date: Jan 2012
Posts: 393
Default

Black mold on underside of plywood in addition....


Quote:
Originally Posted by Maintenance 6 View Post
I totally agree with that. If you know where to look, you will find mold. Practically all mold on framing goes dormant after the structure is dried in and never resurfaces as a problem. There is also a ton of misleading information out there about "toxic mold". There is also a lot of misconceptions about mold spores. Mold spores are everywhere. Unless you are living in a clean room, the last breath you took included more than a few. I once saw a worker screw up an air clearance sample when he ate his lunch on a jobsite. He sprinkled ranch dressing on a salad near an air pump and drove the spore counts up. Want a real dose of spores, open a loaf of moldy bread in your kitchen. And bread molds produce some of the nastiest by-products. I never once heard of anyone who died from breathing moldy bread. That's not to say that it's safe to be exposed to overwhelming spore loads or mycotoxins, or to say that some molds don't produce really nasty things. After all, Anthrax is a mold by-product. Common molds in buildings don't make anything close to that.
There is no reason a new house should have mold in it unless its built wrong. The fact that New products off the shelf do not have mold on them is proof of that. Lowes, home depot, etc. cannot purposely sell stuff with mold on it. It would be a liability and they would lose business.

Last edited by jasin; 02-12-2012 at 08:43 AM.
jasin is offline   Reply With Quote
Old 02-12-2012, 01:22 PM   #27
Mold!! Let's kill it!
 
Join Date: Feb 2008
Location: Central Pennsylvania
Posts: 2,830
Default

Black mold on underside of plywood in addition....


I can pretty much guaranty that I could find mold somewhere in practically any house. It's a fact of life. Most of it can be there for years and never cause any problem, but it's still there. The first place I would look is under the kitchen sink, then in the vanity and after that, the laundry room. And that's not taking into consideration anything that happened during construction and left some dormant colonies however small.
Maintenance 6 is offline   Reply With Quote
Old 02-12-2012, 10:51 PM   #28
Member
 
Join Date: Jan 2012
Posts: 393
Default

Black mold on underside of plywood in addition....


Quote:
Originally Posted by Maintenance 6 View Post
The info in the toxic black mold info link is pretty accurate, but you need to understand what "inactivated by organic matter" means. It means that as the compound does it's job it becomes weaker until it is ineffective. It has little residual "killing power". Would you really want a chemical residue to remain active after it's job is complete? I'm really surprised that alcohol is on the list, since it is never used as a remediation product. In fact alcohol is a by-product of the metabolism of more than one mold specie.

The Spore Tech site is another of the "Mold is Gold" sites out there. A grain of truth, but a lot of BS in between. Example: "OSHA is the first federal agency to announce a departure from the use of chlorine bleach in mold remediation." What does OSHA know or care about killing mold? Their interest is in NOT killing workers. (See previous post).

Here are some links from more reputable sources

http://accessscience.com/studycenter...uestionID=4918

http://www.jacionline.org/article/S0...083-1/abstract


Let me also add that unless you are totally familiar with them, you should NEVER use Glutaraldehydes for remediation.

If one reads the fine print on the mold remediation products sold, you'll find that all of them include disclaimers about deep seated mold in porous materials and that they offer no guarentees about their effectiveness. That includes some of the best fungicides out there.

Is bleach the absolute best product out there? No. Do I use it on remediation jobs? Somtimes. Depending on conditions. In highly sensitive places? Yes. It leaves very little in long term chemical residuals.

It is easy to use. Readily available and as effective as most other products. Everybody has a bottle in their laundry room. It is also easy to mis-use. Never exceed 10%.
This is good info
jasin is offline   Reply With Quote
Old 02-12-2012, 10:57 PM   #29
Member
 
Join Date: Jan 2012
Posts: 393
Default

Black mold on underside of plywood in addition....


Quote:
Originally Posted by Maintenance 6 View Post
I can pretty much guaranty that I could find mold somewhere in practically any house. It's a fact of life. Most of it can be there for years and never cause any problem, but it's still there. The first place I would look is under the kitchen sink, then in the vanity and after that, the laundry room. And that's not taking into consideration anything that happened during construction and left some dormant colonies however small.
I am glad I do not live where you work because the contractor who's building and/or remolding these houses is clearly not doing it right.


Last edited by jasin; 02-13-2012 at 02:00 PM.
jasin is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Some mold on inside of plywood roof capecodfun Building & Construction 11 01-30-2011 08:15 AM
mold and wet plywood PJS908 Flooring 1 11-22-2010 05:15 PM
mold on plywood subfloor jmnkblair Kitchen & Bath Remodeling 1 08-15-2010 11:45 AM
Fixing a screwup - stain on oak plywood brich Carpentry 9 05-13-2010 11:09 PM
Molde: Underside of Attic Floor stangboy68 Building & Construction 9 12-06-2007 09:53 AM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.