1" of foam Insulation for + standerd Batt r- 30 ?


Building a Steel Framed Home & I want to know if more insulation is not the best for a home ?

Can A home be Too Tight & Not Breath?

q 1 of foam insulation for standerd batt r 30

Steel Framed Home

  6 answers
  • Gk Gk on Oct 16, 2018

    Depending on where you live your contractor can recommend how much insulation you should use. Too much insulation will trap moisture in your home which could lead to mold problems. Here is some info for you: https://www.energy.gov/energysaver/weatherize/insulation/where-insulate-home

  • Dale Dale on Oct 16, 2018

    Code requires that HVAC units have a fresh air intake and most roofs have a roof vent and soffit vents. Unless you put the insulation at the roof line this should provide adequate fresh air intake. If you are going to put the insulation at the roof line and not provide air circulation in the attic then the fresh air intake will be adjusted. Please have your contractor give you a HVAC load calculation and Manual D, this is basic information that any HVAC contractor can give you.

  • 2dogal 2dogal on Oct 16, 2018

    Follow the UBC. Universal Building Code. Call your HVAC contractor talk to him before going further.

  • Where is this house being built? Permits pulled? Inspections being performed during each phase of construction? Local Building codes dictate what is usual and customary for the area. You need to familiarize yourself before going any further. And yes, a house can be too tight. Will cause humidity to be trapped and cause rot and mold issues. A house needs to "breathe" - which does sound odd, but it's true.

  • Steven Steven on Oct 17, 2018

    My house was engineered with max insulation in walls ceiling and I’m so glad I did. However, my house has a whole house air refresher. I also have 6 mil plastic lining all exterior walls and ceilings

  • Bijous Bijous on Oct 17, 2018

    Hi. Yes, too air tight can cause a "sick home". This happened in the ''90s and homes in the South USA became mold riddled. People literally had to move out of the homes. Use what's recommended for your climate. Good luck!