Expanding foam insulation works best around doors. Typically, there is little room for insulation between the doorjamb and frame, much too little room for typical fiberglass insulation. If you try to compress fiberglass insulation in such a tiny spot, it becomes compact and loses its insulating qualities. Low-expansion foam insulation fills even the tiniest cracks and expands to fill odd spaces and hollow spots to insulate and stop drafts.
How to Replace Weatherstripping on an Exterior Door
How To Weatherproof French Patio Doors
The seal around an exterior door has several functions. It seals out noise, drafts, rain and even insects. Over time, the door seal can rot and crack, preventing the door from sealing shut. This is not only unattractive, but it is also inefficient, as the drafty air can increase heating and cooling costs.
How to Weatherproof Old Doors
Doors leak twice as much air as windows. This is a fact we often take for granted during the hot and cold months. Additionally, doors are used way more often than windows are in terms of opening and closing them , so you can see why making sure they are properly sealed is a must if you live in places that have harsh climates and temperatures. Other types probably will have to be replaced. Feel along the threshold.
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