The culprit isn't your furnace or your insulation—it’s the invisible gaps around your windows.
You’ve felt it. That mysterious shiver while sitting on the couch. The way the curtains puff inward on a windy day. The sudden spike on your heating bill that makes you double-check the thermostat. seal cracks around windows
Snip the caulk tube nozzle at a 45-degree angle. You want a bead the size of a pencil lead, not a garden hose. Poke the inner seal with the wire on the gun. The culprit isn't your furnace or your insulation—it’s