Polyiso foam

[Wasden]

Polyiso Thermal Gard foam sheathing on interior basement. It's clearly labeled "combustible". Does this emit a toxic gas when burned? I've seen it used on exterior but is it acceptable for interior?

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[Marc]

Many types of building material gives off toxic fumes when burned. That polyiso needs to be concealed behind gypsum.

Marc

[kurt]

You want drywall for a thermal barrier anyway. Foam without mass inside it isn't particularly effective.

[Wasden]

Thanks guys!