For a 1920s home check for knob-and-tube wiring before insulating walls. It is not safe to insulate over active K&T wiring. Have an electrician assess first.
General rule: you should not embed wiring inside spray foam unless the wire is properly derated for reduced heat dissipation. The NEC has specific rules under Article 310. Encasing Romex in foam reduces its ability to shed heat.
Intumescent coatings like No-Burn or DC315 are your best bet if code requires a thermal barrier and you do not want to hang drywall. Make sure the coating is ICC-ESR listed for your specific foam.
Intumescent coatings like No-Burn or DC315 are your best bet if code requires a thermal barrier and you do not want to hang drywall. Make sure the coating is ICC-ESR listed for your specific foam.
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Mike T. (TX) posted in Contractor Talk: "Best temp settings for 2lb foam in summer heat"New article: "Spray Foam R-Value: The Complete Guide" — Read it nowSarah K. (OH) rated a contractor 5 stars in ClevelandWebinar: Cold Climate Installations — June 18 at 2PM EDT — Register Free28 new members joined this week!Texas Chapter Meetup: June 24 in Dallas — RSVP nowFoamPro_Dave replied: "Graco vs Gusmer after 8 years — my verdict"Mike T. (TX) posted in Contractor Talk: "Best temp settings for 2lb foam in summer heat"New article: "Spray Foam R-Value: The Complete Guide" — Read it nowSarah K. (OH) rated a contractor 5 stars in ClevelandWebinar: Cold Climate Installations — June 18 at 2PM EDT — Register Free28 new members joined this week!Texas Chapter Meetup: June 24 in Dallas — RSVP nowFoamPro_Dave replied: "Graco vs Gusmer after 8 years — my verdict"
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Mike T. (TX) posted in Contractor Talk 2 min ago
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