Blown-in insulation involves the process of using specialized equipment to blow loose insulation material into walls, attics, or around gaps and crevices. This insulation material, commonly known as loose fill, can be made from cellulose, fiberglass fibers, or styrofoam pellets.
During home construction, fiberglass insulation is typically placed between wall studs and ceiling joists before the installation of sheetrock. However, over time, this insulation may settle, creating small gaps that allow air to pass through, leading to heat loss. Reinstalling these sheets can be challenging, especially in areas like unfinished attics or rooms with obstructions.
Blown-in insulation offers a solution to this problem by effectively sealing these gaps and improving the home’s R-value, which measures the insulation’s effectiveness. The R-value depends on the thickness of the insulation layer applied, with thicker layers providing higher R-values suitable for regions experiencing harsh winters.
Advantages of Blown-In Insulation:
- Energy Efficiency: Blown-in insulation seals small gaps, reducing heat loss in winter and preventing cool air from escaping in summer, thus reducing the need for constant HVAC use.
- Fire Resistance: By filling crevices with insulation, the risk of smoke accumulation during a fire is minimized, enhancing fire protection.
- Ease of Installation: Blown-in insulation is installed quickly with a hose, typically in a few hours, compared to the time-consuming process of installing fiberglass rolls.
- Insect and Critter Repellent: Some types of blown-in insulation are treated to deter insects and critters, reducing the risk of infestation in attics.
- Cost Efficiency: While initial installation costs may be around $1,600, the long-term energy savings often justify the investment.
Disadvantages of Blown-In Insulation:
- Professional Installation Required: Installation may require professional assistance, especially when drilling between studs containing electrical wiring.
- Weight Concerns: Excessive loose fill on attic floors can cause ceilings to sag due to the added weight.
- Messiness: Blown-in insulation can be messy, necessitating proper protective gear and cleanup afterward.
- Distance from Recessed Lights: Loose-fill insulation must be kept away from recessed lights to prevent overheating and fire hazards.
- Noticeability: Installation involves drilling holes in the exterior, which may be more noticeable on certain surfaces like brick or stucco.
- Lack of Water Resistance: Loose fill should be installed in dry areas to prevent water damage and maintain optimal performance. Seal any gaps or cracks and address leaks before installation.
