Do I Need To Insukate Cold Air Return In Attic

Stop using your attic for storage.

Do i need to insukate cold air return in attic. But if you don t do this you re setting yourself up for moisture problems. But if the floor is covered in plywood you can t stuff enough insulation beneath it to do the job sufficiently not even in warm climates. The exfiltration of warm interior air through your attic and the infiltration of cold outside air through your basement or crawl space could be to blame. Continuous air space between.

Likewise when the air is only holding half of the water that it can hold then the humidity level is 50. Now that we know what humidity is we can talk about the dew point. Because the simplest and cheapest way to insulate an attic is to add material to the floor. When you add insulation to attic rafters and attic floors it s important to maintain at least a 1 in.

However air can only hold a limited amount of water. So the real cooling load for the house is likely to be no more than 1 1 3 tons but it could even be on the order of 3 4 tons with the air leaks to the attic sagging attic insulation are corrected. First building codes in many areas require that the cold air return line gets external insulation and therefore you will need to leave a gap for the insulation around the duct return line. Due to your attic s location at the top of your house it can be a major location for energy loss especially if you lack sufficient insulation.

When the air is holding as much water as it can possibly hold the humidity level is said to be 100. The remaining 2 tons of capacity is at least 1 5x oversized for the actual 1 load. The insulation will keep the naturally hot or cold air in the garage and the artificially warmed or cooled air in the room above it. At first it seems odd to add insulation for warmth and then purposely create ventilation holes for cold air to enter.

Plan to pull up the flooring and layer new insulation on top of the old. Running a metal cold air return duct between studs requires knowledge of both hvac systems and the components involved in framing. Homeowners also should insulate a garage completely including in the attic above it.