Today they insulated our barn with Icynene - better known as spray foam. It started out when they masked off the windows - doors - and floors. Then a guy in a hazmat suit used a double hose spray gun that mixes 2 chemicals to make instant foam. The foam temperature rises to 170 degrees during the process. This foam looks like snow and expands to fill all the cracks. We put 8 inches in the roof and 6 inches in the walls. After it was over - they used a saw to remove the excess. The reduction in heat level and sound level is dramatic. The city inspector came during the application and remarked what a splendid job this is.
Next - the drywall - bathroom - floor - and we are done.
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