Re: PU foam remediation (SPF)

[Guest guest]

,

I have dealt with about 8 cases of bad spray polyurethane foam (SPF).

Most have had to be removed.

The errors are usually blamed on installers and I am not certain that

this is the case. If too much B is added, the odor is that of the

tertiary amine catalyst.

Other possibilities included a large variety of VOCs including many

hydrocarbons and aldehydes, acetic acid, 1,3-dioxolanes, dioxane, etc.

Too much A may yield some of these.

If too much closed-celled foam is sprayed in one " lift, " overheating

can result in decomposition and a whole series of other compounds.

I have a health risk assessment from LaPolla if anyone is interested;

send email.

May

May Indoor Air Investigations LLC

Tyngsborough, MA

www.mayindoorair.com

> ________________________________________________________________________

> 1a. Re: PU foam remediation

> Posted by: " scottarmour@... " scottarmour@... scottarmour@...

> Date: Tue May 8, 2012 10:47 am ((PDT))

>

> What chemical is offgassing that is causing a 'sensitization'?

> Is there evidence that this chemical is present and if so, what

> levels? (I know about the immediate release of the isocyanates

> during the application and immediate expansion prior to drying and

> hardening)

>

> Is there literature and research or case studies that show the PU

> will offgas voc's? if so, what chems? levels? time (half-life, etc.)?

>

> Thanx.