Topic Installing a Solar Power System
220 postsMon 16th Apr 2018 - 1:58pm
By laying radiant barrier foil across your existing attic insulation, it works Smart Energy Box off the emissivity quality of pure aluminum. This is similar to wrapping a potato with foil to keep it hot. The stored heat in the potato is not easily converted to radiant energy.
The other benefit of installing a radiant barrier in cold climates is to reduce convective airflow inside the insulation. In a standard attic, the insulation is "Open" to the cold air inside the attic. The effectiveness of the insulation is greatly reduced since cold air is heavy and dense. The cold air will "fall" down through the attic insulation. Warm air close to the ceiling will rise and the result is a 'convective loop" of air pumping through the attic insulation.
By installing radiant barrier over attic insulation it acts similar to the outer wind layer on a jacket. Air movement will be reduced resulting in higher r-value performance of your home insulation.
It is important to use a perforated radiant barrier to allow moisture in its vapor form to pass. Otherwise moisture can condense on the bottom of the foil and lead to wet insulation, mold and possibly wood rot. Make sure the ceiling is also sealed airtight. Holes from lights, and other fixtures can leave a path for warm-moist air to get into the insulation. This can result in moisture inside the attic insulation. It cannot be emphasized enough to use a perforated radiant barrier attic foil in cold climates.
Comfort is another reason to install a radiant barrier. By keeping heat from escaping, your home will feel consistently warmer from room to room. This will reduce your need for heating and save you money on your Winter heating bills.
11 postsMon 16th Apr 2018 - 6:00pm
i love that post