For most Albuquerque homes the highest-return combination is air sealing plus blown-in insulation at the attic floor, bringing depth up to current recommended levels. Spray foam makes sense where you need air sealing and insulation in one step, and rigid board in specific assemblies. But the choice matters less than doing the sealing first.

The Options

  • Blown-in (cellulose or fiberglass). The workhorse for attic floors. It fills irregular spaces and around obstructions well, goes in fast, and is cost-effective per R-value. Best value for most retrofits.
  • Spray foam. Air seals and insulates simultaneously, with high R-value per inch. Excellent for rim joists, difficult cavities, or converting an attic to conditioned space. Higher cost, and it needs to be installed by someone who knows what they are doing.
  • Fiberglass batts. Reliable and affordable in open wall cavities during construction or renovation. Less forgiving in retrofits, where gaps and compression undercut performance badly.
  • Rigid foam board. High R-value in thin assemblies — useful on foundation walls, roof decks, and specific detail areas.

Air Sealing Comes First

This is the part most often skipped and it matters more than R-value. Gaps around can lights, plumbing and wiring penetrations, top plates, and the attic hatch let conditioned air escape into the attic no matter how deep the insulation above it is. Sealing then insulating outperforms simply adding depth, and it costs less.

Ducts Are Part of the Job

Ductwork in an attic that hits 130 degrees is a specific problem: leaks dump the cooling you just paid for, and uninsulated duct absorbs heat along every foot of the run. On a new AC installation, sealing and insulating ducts frequently returns more than any other single measure.

Insulate Before You Size the New System

Improving the envelope first reduces the cooling load, which may point the load calculation toward smaller, less expensive equipment that also runs longer, quieter cycles. Doing it in the other order means paying for capacity you no longer need.

We assess insulation and ducts as part of every installation quote. Financing can cover both. Contact B. Carlson in Albuquerque.