Wall Insulation

Well insulated walls are an important part of an energy efficient home

We use JM Spider as our preferred blow in wall Insulation. JM Spider is a fiberglass JM Spider® Loose-fill fiberglass insulation. This insulation is for drill-and-fill jobs. We use it because it has smaller fibers to fill tight spaces around pipes, wires, electrical boxes and other cavities. This maximizes the R value, or resistance to heat transfer. JM Spider insulation offers many big advantages over cellulose in drill-and-fill applications. We use this type of wall insulation because it offers superior thermal and sound deadening. We also use it because it meets new Building Performance Institute standard for dense-pack wall applications. For more information on the type of wall insulation we use check out jm.com


NW Insulation Wall Insulation

Benefits of JM Spider:


  • Up to 25% greater R-Value than dense packed cellulose.
  • Up to 30% better airflow restraint than cellulose.
  • Far more cost effective than foam.
  • Does not promote old or mildew growth.
  • Primarily composed of sand, a rapidly renewable resource.
  • Contains at least 25% recycled glass.
  • Won’t settle.
  • Non Corrosive.
  • Non Combustible.
  • Formaldehyde free.








Give us a call today (503) 640-9000 or send in an audit request (check the right- “Schedule an Audit Today”) and we can come check out your attic insulation and any other energy efficiency concerns you may have at no cost. You might be surprised at what you qualify for.


Trade Ally of Energy Trust of Oregon