Categories Guide

Readers ask: Can I add more insulation to my attic?

You can absolutely new insulation over old insulation… as long as it isn’t wet. Remove any wet insulation. Wet insulation can lead to mold, mildew, or even the rotting of your ceiling or roof rafters.” In fact, you can add new insulation over the existing installation in other areas of your home, not just the attic.

Can I put new insulation on top of old?

According to ENERGY STAR®, you can put new insulation over old insulation, “ unless it is wet. The vapor retarder on top of or between layers of insulation can trap moisture. Any existing batt or roll insulation in the attic should have the facing against the attic drywall floor or no facing at all.

Will adding more insulation attic make difference?

One of the places in your home where a little bit of attention can make a big difference in your comfort — and heating bill — is the attic. According to the Department of Energy, properly insulating the attic can save 10 to 50 percent on a typical heating bill.

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Can you add too much insulation to your attic?

Can you over insulate your attic? The answer is yes! Past a certain point, insulation in a vented attic will do more harm than good. In most of the United States, achieving an R-Value of 38 is more than sufficient.

Does adding extra insulation in the attic help?

Insulating Your Attic Can Save You Money There’s no getting around it: If your house is in a cold climate, keeping it warm in winter is expensive. And it works the opposite way for warm climates; in summer, it helps stabilize your house’s indoor temps to keep cooling needs in check.

Should old insulation be removed before adding new?

Expert contractors that specialize in insulation advise that removing old fiberglass insulation is best before installing new cellulose insulation because of possible mildew, mold, or rodent excrement.

Can you put 2 layers of insulation?

Doubling the thickness of insulation will double the insulation’s R-value, cutting heat loss in half. Each time the insulation layer is doubled in thickness, this rule applies. In some cases, like an attic, it’s worth piling on more insulation because there is plenty of room.

Does extra loft insulation make a difference?

The most obvious difference offered by an insulated loft is the saving in energy bills, and it’s very simple here. It’s estimated that a quarter of all the escaping heat from a building goes through the roof. That means you could recover the modest cost of the insulation in as little as two years.

How many inches of insulation should be in my attic?

R-Value is a measure of insulation’s ability to resist heat flow. The higher the R-Value, the better the thermal performance of the insulation. The recommended level for most attics is to insulate to R-38 or about 10 to 14 inches, depending on insulation type.

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What happens if you don’t have enough insulation in your attic?

Even if you don’t use your attic at all, insulation helps keep the heat or cold in, so your bills won’t be so high. Without insulation, the heat from your heating system, or the cold from your air conditioner, will escape from the attic.

Can you have too much insulation in your loft?

Lofts can’t just chip off a layer of insulation, so the need to breathe is far more important. So, can too much loft insulation cause condensation? Yes it can, and it can cause havoc in your home as well.

Can a house be sealed too tightly?

So, to answer our original question: Can a house be sealed too tightly? The answer is: No! With proper house ventilation systems, a tightly-sealed Eastern Shore house offers superior control of your home performance, from increased energy efficiency that will keep your energy bills down to higher indoor air quality.

How can I make my attic more energy efficient?

5 Ways to Make Your Attic More Energy Efficient

  1. Install energy-efficient ventilation to improve air circulation in your attic.
  2. Use energy-efficient attic fans to regulate your home climate.
  3. Install radiant barriers in your attic to improve heating and cooling efficiency.
  4. Seal cracks to minimize air leaks in your attic.

How much does it cost to add insulation to the attic?

The average cost to insulate an attic is between $1 and $7 per square foot. This equates to a typical price range of up to $1,500 per project including labor and materials. For attics with smaller square footage, costs can be as low as $500 while insulation for larger attics can cost up to $4,000.

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Can you stack insulation batts?

A: There’s no problem with installing fiberglass batts over your existing blown-in insulation. If you install faced insulation over existing blown-in, you’re essentially putting the vapor barrier in the middle, between the two layers of insulation.

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