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Mold control in new construction mchappe 06-08-2007
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Posted by mchappe on June 8, 2007, 9:04 pm
As a follow-up to a previous post:
There's a product called Concrobium Mold Control (manufactured in
Toronto) which can be used to "inoculate" new wood frame construction
against subsequent mold formation. Instructions say it will provide
about 400 square feet of coverage per gallon.
My son and I are going to spray it (and let it dry thoroughly) in the
stud bays of his new house prior to insulating. Price is approx. $33/
gallon.


Posted by RicodJour on June 9, 2007, 9:15 pm
> As a follow-up to a previous post:
> There's a product called Concrobium Mold Control (manufactured in
> Toronto) which can be used to "inoculate" new wood frame construction
> against subsequent mold formation. Instructions say it will provide
> about 400 square feet of coverage per gallon.
> My son and I are going to spray it (and let it dry thoroughly) in the
> stud bays of his new house prior to insulating. Price is approx. $33/
> gallon.

I posted a reply to this yesterday - not sure why it's not showing
up. I'll recap the highlights.

Active ingredient in Concrobium (single worst product name) is sodium
carbonate, aka washing soda. It's laundry detergent stuff and cheap.
The Concro stuff is 0.5% sodium carbonate and has a boiling point of
212 F - that's water.

In other words you'd be getting hosed if you bought that stuff. Make
your own. You could probably use baking soda as a substitute.

R


Posted by RicodJour on June 10, 2007, 12:39 am
>
> > As a follow-up to a previous post:
> > There's a product called Concrobium Mold Control (manufactured in
> > Toronto) which can be used to "inoculate" new wood frame construction
> > against subsequent mold formation. Instructions say it will provide
> > about 400 square feet of coverage per gallon.
> > My son and I are going to spray it (and let it dry thoroughly) in the
> > stud bays of his new house prior to insulating. Price is approx. $33/
> > gallon.
>
> I posted a reply to this yesterday - not sure why it's not showing
> up. I'll recap the highlights.
>
> Active ingredient in Concrobium (single worst product name) is sodium
> carbonate, aka washing soda. It's laundry detergent stuff and cheap.
> The Concro stuff is 0.5% sodium carbonate and has a boiling point of
> 212 F - that's water.
>
> In other words you'd be getting hosed if you bought that stuff. Make
> your own. You could probably use baking soda as a substitute.

To illustrate how much they're overcharging for the Conco stuff...
http://www.soapsgonebuy.com/Arm_and_Hammer_Washing_Soda_p/ah1001.htm
About five bucks for a four pound box. For that, you could probably
make fifty gallons of solution, or $1500 worth of Concro. Five bucks
and some stirring, or $1500 so you don't have to mix anything and you
get some packaging.

R


Posted by Roarmeister on June 10, 2007, 10:45 am
On Sat, 09 Jun 2007 18:15:31 -0700, RicodJour

>> As a follow-up to a previous post:
>> There's a product called Concrobium Mold Control (manufactured in
>> Toronto) which can be used to "inoculate" new wood frame construction
>> against subsequent mold formation. Instructions say it will provide
>> about 400 square feet of coverage per gallon.
>> My son and I are going to spray it (and let it dry thoroughly) in the
>> stud bays of his new house prior to insulating. Price is approx. $33/
>> gallon.
>
>I posted a reply to this yesterday - not sure why it's not showing
>up. I'll recap the highlights.
>
>Active ingredient in Concrobium (single worst product name) is sodium
>carbonate, aka washing soda. It's laundry detergent stuff and cheap.
>The Concro stuff is 0.5% sodium carbonate and has a boiling point of
>212 F - that's water.
>
>In other words you'd be getting hosed if you bought that stuff. Make
>your own. You could probably use baking soda as a substitute.

According to the Canadian MSDS sheet, it's actually 1.19% trisodium
phosphate. According to the American MSDS sheet it is 0.95% sodium
carbonate. So the manufacturer makes 2 different but very similar
products and calls it the same name.

Now the TSP you can buy in the hardware store may not be pure TSP but
rather substituted with up to 80-90% sodium carbonate. The reason TSP
is being cut down is that phosphates acts as a fertilizer to promote
the growth of algae if it gets flushed into your plumbing.

From Wikpedia:
"Trisodium phosphate (TSP), available at most hardware stores in white
powder form, is a cleaning agent and degreaser, commonly used to
prepare household surfaces for painting. In the early 1970s the use
of phosphate-containing products was limited. Now products sold as TSP
Substitute, containing 80-90% sodium carbonate, are promoted as a
direct substitute.

Cleaning products labeled as TSP may contain other ingredients as
well, and may in fact be less than half TSP. So even "regular" TSP
found at the hardware store may be half TSP and half "TSP substitute".
Savogran's brand actually contains 80% trisodium phosphate
dodecahydrate."

Posted by RicodJour on June 10, 2007, 11:12 am
>
> According to the Canadian MSDS sheet, it's actually 1.19% trisodium
> phosphate. According to the American MSDS sheet it is 0.95% sodium
> carbonate. So the manufacturer makes 2 different but very similar
> products and calls it the same name.
>
> Now the TSP you can buy in the hardware store may not be pure TSP but
> rather substituted with up to 80-90% sodium carbonate. The reason TSP
> is being cut down is that phosphates acts as a fertilizer to promote
> the growth of algae if it gets flushed into your plumbing.

Sodium carbonate is used in the fruit industry to inhibit mold growth
on fruit. By it's other name, washing soda, it is used in laundry and
cleaning applications. No reason to use phosphates if you don't have
to. There's no way you're getting TSP, whether nearly pure or purely
adulterated, for anywhere near as low of a price as the washing soda.

R


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