Fiberglass Insulation in Seven Corners, VA

Fiberglass remains the most cost-effective insulation system for many Seven Corners projects, particularly when budget control or code-minimum compliance is the priority. We install it in three forms: cut-to-fit batts during framing-stage remodels and additions, BIBS netted dense-fill for closed walls in 1950s-60s homes, and blown loose-fill for attic top-ups. The choice depends on the assembly. For a basement finish or addition along Wilson Boulevard where speed and code R-value matter most, batts are the right answer. For a 1958 ranch with closed walls full of wires and unknown framing, BIBS reaches every corner without lifting drywall.

BIBS for Closed Walls, Loose-Fill for Attics

The Blown-In Blanket System (BIBS) is the right answer for Seven Corners homes built between 1955 and 1985, where original wall insulation was skipped or installed inconsistently. Our crews staple netting to the cavity face, then blow fiberglass to a verified 1.8 to 2.0 pcf density. The result is a custom layer that touches every surface, surrounds wires and outlets, and delivers the rated R-value across the entire wall. In attics, blown loose-fill at 14 to 16 inches reaches R-49 evenly across joists, eliminating the cold spots that come from compressed or settled batts at the eaves.

Code R-Values, Ventilation, and Fairfax County Documentation

Seven Corners falls within Fairfax County and Climate Zone 4A under the IECC, which sets minimums of R-49 in attics, R-13 to R-15 for 2x4 walls, and R-21 to R-23 for 2x6 walls. We meet or exceed these targets, with documentation submitted for the IECC inspection. Bath fans are confirmed to vent outdoors, recessed lights receive rated covers or safe clearances, and soffit baffles maintain attic ventilation channels so assemblies dry as designed. Low-VOC and formaldehyde-free fiberglass products are available on request for indoor air quality sensitive projects.