Encapsulation.

I believe it to be a type of encapsulation or preventative measure of possible;

• Smoke damage
• Mold issues
• Lead based paint
• Moisture build-up preventative measure

This wasn't done for fun or a hobby. Something was there that needed encapsulating-- I'd recommend that the buyer request disclosure why the need was present and who recommended the preventative measure.

Rich

__________________
"If con is the opposite of pro, is Congress the opposite of progress?"
Richard Rushing, HCRI
Duncanville, Tx.