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Wayne E Smith
New member
Username: wayne_smith

Post Number: 1
Registered: 05-2005
Posted on Friday, May 27, 2005 - 10:10 am:   Edit PostDelete PostPrint Post

I have read through a number of the discussions on mold and a number of the sited resourses and found them very helpful regarding keeping materials dry and enclosing before starting finishing work. But I have not seen much on the problem of moisture curing materials in enclosed enviroments.
What happens when I have a contractor trying to hang drywall in an enclosed area a day or two after the concrete floor is poured or the block is laid up?
Is there a humidity level below which it is safe to install wood furring and gypsum board? Is there a minimum number of days after the concrete is poured? What other ways are there for dealing with this issue?
William C. Pegues, FCSI, CCS
Senior Member
Username: wpegues

Post Number: 398
Registered: 10-2002
Posted on Saturday, May 28, 2005 - 04:11 pm:   Edit PostDelete PostPrint Post

Wayne,

Its not that the concrete is not cured or that block is going up, its that given that, it is unlikely that the area is enclosed, ventilated and temperature controls available, unless there are temporary facilities to compensate

Here are the kinds of things I have seen required in most specs, and recommended in the manufacturer's information...

Installation should not start when outside temperature is below 55 degrees F unless building is enclosed and heated to maintain a continuous and uniform temperature of not less than 55

Typically the above must be maintained from in advance of 1 week prior to beginning of joint treatment until joint treatment is completed and thoroughly dry.

Ventilation, either natural or supplied by fans, circulators or air conditioning systems.

Now, sometimes the manufacturer will state that this does not have to be done - but what you do is require that they provide a written waiver from the manufacturer (not just the rep).

William
J. Peter Jordan
Senior Member
Username: jpjordan

Post Number: 81
Registered: 05-2004
Posted on Tuesday, May 31, 2005 - 05:21 pm:   Edit PostDelete PostPrint Post

Drywall compound can also be a problem; it can contribute to the moisture problem and not properly cure in the presence of too much humidity. There is a company called Munters that makes dehumidification equipment for such circumstances. They are also a useful resource in a flood.

I do like William's idea about getting the manufacturer to buy into the procedure.
Helaine K. Robinson CCS
Senior Member
Username: hollyrob

Post Number: 152
Registered: 07-2003
Posted on Tuesday, May 31, 2005 - 05:53 pm:   Edit PostDelete PostPrint Post

Munters http://www.munters.com

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