- Air Conditioning
- Home Energy Audit
- Oil to Gas Conversion
- Crawl Space
Most homeowners understand that attic insulation is the first line of defense for keeping their home comfortable and energy efficient. But how much is enough? Homeowners in Nassau and Suffolk Counties count on the efficiency experts at Green Homes Long Island to answer attic insulation questions.
Start with a Home Energy Audit
When assessing attic insulation, many of our customers start with a home energy audit which takes a look at the entire home’s performance, including attic insulation. Our home energy audit will identify areas where attic insulation is compressed or ineffective, as well as where air leakage is occurring that can cause home heat loss and minimize the attic insulation’s effectiveness.
When Should I Replace Old Insulation?
If your home has experienced a leaky roof, or there are signs of pests nesting, it’s probably time to replace your insulation. Wet or rodent-infested insulation can develop mold and bacteria and pose an unpleasant health hazard. Older insulation can also become compacted and ineffective over time. Removing old insulation, air sealing and installing new insulation provides the biggest return on investment and most effective insulation barrier.
What is the Recommended Attic Insulation R-Value?
Insulation R-values measure how resistant the material is to transferring heat. Most insulation relies on tiny pockets of air to keep heat from passing through. In our area, R-38 or more is recommended for attics. The thickness will vary among the materials used for insulation. In addition to the attic floor, many homes have ductwork located in the attic that should be insulated as well.
Air Sealing Decreases Home Heat Loss
One important component to effective attic insulation is making sure your attic area is well sealed. Air sealing helps your insulation perform by keeping air from passing through. An energy audit can identify air leaks in the attic. Before we install new insulation, we like to seal off these leaks to ensure maximum performance. In fact, conducting air sealing alone can cut as much as 20% off your monthly energy bill.
Attic Insulation Types
After completing hundreds of insulation installations, Green Homes Long Island has narrowed our attic insulation the most effective options:
Spray foam insulation which does double duty by air sealing with insulation foam in one application