Blown-in insulation — also called loose-fill insulation — is the most popular and effective method for insulating existing attics because it fills every contour, crevice, and irregular space without leaving the gaps and voids that cut batts can leave behind. Montebello Attic Insulation offers blown-in fiberglass and blown-in cellulose, and our team will help you choose the right material based on your attic's moisture conditions, pest history, and target R-value.
Blown-in fiberglass is lightweight, moisture-resistant, and non-combustible, making it an excellent choice for most Southern California attics. Blown-in cellulose, made from recycled paper treated with borate-based fire and pest retardants, is a greener option that also offers excellent coverage and is particularly effective at filling odd-shaped spaces around obstructions. Both materials are installed using a professional blowing machine that delivers consistent, measured depth across the entire attic floor.
Our technicians use calibrated equipment and depth rulers throughout the job to ensure that every section of your attic reaches the target R-value. After installation, we photograph the finished depth readings and provide a written summary for your records — useful documentation for home sales, permit applications, or utility rebate programs you may qualify for through Southern California Edison or SoCalGas.
- Licensed and fully insured technicians
- Free estimates and upfront pricing
- Same-day and emergency service available
- Commercial and residential expertise
- Satisfaction guaranteed on every job
- Locally owned — we know your area