21 Jan '12, 5pm

Thx! We often get questions about OSB used in our pre-fab panels. This is a good overview of the issue.

First of all, there is not a huge difference in offgassing between OSB (oriented strand board) and exterior-grade plywood . You are right to be concerned, however, about offgassing from wood panels, as the EPA has classified formaldehyde as a probable human carcinogen. Having said that, there are important differences in the types of formaldehyde resins and their use in wood panel products . The first important distinction is between urea-formaldehyde (UF) and phenol-formaldehyde (PF). UF is more toxic and should be avoided at all costs in anything you put in your home. PF is more water resistant and stable than UF, which means formaldehyde will offgas at lower levels and very slowly, but for a longer period of time. PF products are considered to be relatively hazard-free. Most exterior plywoods and OSBs use PF. Unfortunately, many interior plywoods, MDFs (medium-density f...

Full article: http://greenhomeguide.com/askapro/question/im-concerned-a...

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