There are a couple names for the cavity created when the floor joists meet the banner board. DryZone employees usually just refer to it as a rim joist slot. These areas will span most of the perimeter of the house and can be a source for air leaks. DryZone uses a method of insulation to get a tight seal and stop thermal leaks and air flow. This is an easy and efficient way to make your crawlspace less of a problem and more like a part of the house.
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