--- title: "Batt Insulation Installation" description: "Batt insulation installation in Orange County. Fitted to full cavity contact, cut around obstructions, and inspected before drywall." url: "https://hanenburg-drywall.vercel.app/services/insulation-installation/batt-insulation" section: "Services" business: "Hanenburg Drywall" location: "Irvine, California" updated: "2026-09-25" --- # Batt Insulation Installation Batt insulation is pre cut fiberglass or mineral wool installed between framing members in open cavities. It is the most common insulation type in new construction and remodels because it is cost effective, but it is also the easiest to install badly. Batts are simple, which is exactly why they are so often installed poorly. A batt stuffed into a cavity and compressed behind a wire, or cut short at the top, or left with a gap at the stud, looks finished from a distance and performs far below its rating. Doing it properly means friction fitting the batt to full contact on all six sides of the cavity, splitting it around wiring and plumbing rather than compressing over them, and cutting neatly around electrical boxes rather than pushing the material behind them. It takes longer and it is the entire difference between rated performance and paperwork. ## Why this matters - Friction fitted to full contact on every side of the cavity - Split around wiring and plumbing rather than compressed over them - Cut neatly around boxes instead of stuffed behind them - Verified before drywall closes the wall ## Our Process 1. **Assess the Assembly**: We look at cavity depth, framing spacing, the space above or behind, and what the assembly needs to achieve thermally or acoustically. 2. **Written Scope**: Estimate stating insulation type, R value or acoustic target, coverage area, and how it coordinates with the drywall schedule. 3. **Protect and Prepare**: Area protected and any existing material removed. Insulation work generates airborne fibre, so containment matters. 4. **Install to Full Contact**: Material installed to fill the cavity completely without compression or gaps, because both destroy performance. 5. **Inspect Before Close In**: We inspect coverage before board goes up, because once the wall is closed nobody will ever see it again. ## What's Included - Cavity measurement and material selection - Air sealing at penetrations first - Batt installation to full contact - Detail cutting around obstructions - Vapor retarder where the assembly requires it - Coverage inspection before close in ## Frequently Asked Questions ### What is the difference between fiberglass and mineral wool batts? Mineral wool is denser, which makes it noticeably better for sound control and gives it much higher fire resistance. It also holds its shape better in the cavity and is easier to cut cleanly. Fiberglass is less expensive and perfectly adequate for straightforward thermal applications. For acoustic partitions we recommend mineral wool. --- **Hanenburg Drywall** 12 Elksford Ave, Irvine, CA 92604 Phone: (949) 446-1300 Email: info@hanenburgdrywall.com Hours: Mon to Fri, 8:00am to 4:00pm Serving all of Orange County with no travel surcharge. Request a free written estimate: https://hanenburg-drywall.vercel.app/contact/request-estimate *Last updated: 2026-09-25*