×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Actual meaning of R-19 insulation

Actual meaning of R-19 insulation

Actual meaning of R-19 insulation

(OP)
I just read in some specs a requirement in regards to the application of some blown-in insulation they call R-19. Is "R-19" just the tradename, or is it the actual R value of this insulation once it´s applied?

RE: Actual meaning of R-19 insulation

The effectiveness of insulation is measured by its "R-Value". The higher a material's R-Value, the better it resists the flow of heat, and therefore, the better it insulates the building. For example, R-19 insulation retains heat better than R-11 insulation. You may be able to estimate the R-Value based on the thickness of the insulation. The most common materials sold for wall and ceiling insulation provide air-based insulation. That is, the materials trap air in tiny pockets, and the air provides the insulation. Each inch of thickness of your average air-based insulating material provides an R-Value of about 3. Therefore, a 3.5-inch thick batt of (average air-based) insulation provides an R-Value of about 11. A 6-inch thick batt of insulation provides an R-Value of about 19.

 

RE: Actual meaning of R-19 insulation

From your description 'R-19' would be the trade name, because the actual R value is dependent on the thickness of the wall cavity that the insulation is being blown into.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources