I am working with an insulation company who has already applied 2" of closed cell foam over the deck of a roof deck that has been remediated for mold twice. It was thought by spraying the foam, there would be no chance of the mold coming back.  This is a million dollar home in the Chicagoland area and homeowner is trying to sell the home but a private home inspector says the foam will shorten the life of the roof and he has scared off perspective buyers with his talk.  I have told the insulator, that I am not going to say anything that I am not sure of or have some documentation.  

I agree the home owner should have solved the source of the mold before doing anything to the home first.  Unfortunately, we are beyond that point.  I am told that the ventilation has now been taken care of and I plan to check the ventilation out this coming week. If anyone has anything to add to the conversation or thoughts to help the homeowner sell his home and have the buyer feel comfortable with the purchase, please let me know.  I have been doing this for 9 years and never had a case like this and want to make sure not to say anything that will get my tail in the ringer.

Thanks

Jerry Needham

Views: 85

Reply to This

Replies to This Discussion

Way to much information is missing to even say something definitive but I can say that yes it can shorten the life of the roof... by about two weeks (shingles) http://thehtrc.com/2011/what-is-a-hot-roof 

As for mold, the iso or is it exothermic reaction should have killed the mold on the sheathing while covering it completely should be enough to encapsulate it - was this done under the roof sheathing or over it

For the roof shingle issue that is an unfortunate issue with many home inspectors that have been given improper information. Shingle color actually has a greater effect than non-ventilation. There will be some shingle degradation but it will be very minimal.

Here is a great article on non-vented roofs.

http://www.greenbuildingadvisor.com/blogs/dept/building-science/ins...

Here is the link to the study referenced in the article-
http://www.fsec.ucf.edu/en/publications/pdf/FSEC-CR-1496-05.pdf


As you probably know mold will grow if conditions are right, it just requires organic matter for food, moisture, warmth, and oxygen. So if those conditions are corrected you should be okay.

You say that 2" of closed cell foam is applied OVER the roof deck.  Where exactly was the foam applied? Is this a flat/low slope roof?  If its to the underside of the roof deck?  You mention ventilation.  How about the ceiling plain...was that air sealed?  2" of closed cell foam is about an R13 depending of which brand of foam was used.  R13 alone applied to a roof deck is not enough to stop condensation. 

RSS

Latest Activity

Ben Thompson replied to Stuart Perkin's discussion TrueFlow in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"Hi Stephen. Do you still have a Trueflow that you would sell? Ben Thompson,…"
16 hours ago
Ben Thompson replied to Landon's discussion WANTED: Blower door complete set Retrotec or Minneapolis in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"Hi Landon. I have a Minneapolis blower door set-up that I would like to sell. It's in…"
16 hours ago
Brett Little posted an event

​I​s your client's house making them sick? - Free CE Webinar at Webinar Online

May 2, 2018 from 12pm to 1:15pm
Indoor air quality issues and smart ventilation strategies for automatically maintaining excellent…See More
20 hours ago
Ben Thompson added a discussion to the group Energy Auditing Equipment for Sale, Trade or to Purchase
Thumbnail

Wanted: TrueFlow plate

Seeking an Energy Conservatory TrueFlow plate (grid) in good condition. Ben Thompson.…See More
22 hours ago
Scott Partlo replied to Jerry Needham's discussion Closed cell on roof deck to prevent mold.
"You say that 2" of closed cell foam is applied OVER the roof deck.  Where exactly was the…"
yesterday
ayazfudugo1 replied to Tom Smith's discussion Are Energy Efficient Windows worth the investment?
"For both new and existing homes, Energy efficient windows are an important consideration Heat…"
yesterday
Profile IconTodd Williams and Haley Keegan joined Diane Chojnowski's group
Thumbnail

Hall of Shame

In this group, members share an array of images from the field, showing the kinds of issues…See More
yesterday
Todd Williams liked Diane Chojnowski's group Hall of Shame
yesterday
Home Energy Magazine posted a blog post
yesterday
Leona Zoey posted a blog post

Landlords Are Your Friends

While it may be easy to forget given their apparent position of power over you, landlords usually…See More
yesterday
Haley Keegan joined Building Performance Institute's group
Thumbnail

Building Performance Institute (BPI)

BPI is the nation's premier standards development, quality assurance and credentialing organization…See More
yesterday
Donald Hester replied to Jerry Needham's discussion Closed cell on roof deck to prevent mold.
"For the roof shingle issue that is an unfortunate issue with many home inspectors that have been…"
yesterday
Profile IconJason Green, Dennis Smith, Alex Ortega and 2 more joined Home Energy Pros Forum
Thursday
tedkidd replied to Quinn Korzeniecki's discussion BPI CEO Larry Zarker's Review of "The Home Comfort Book" in Healthy Indoors Magazine in the group Building Performance Institute (BPI)
"...free chapters of book available here - http://bit.ly/HPchapterlist"
Thursday
tedkidd liked Quinn Korzeniecki's discussion BPI CEO Larry Zarker's Review of "The Home Comfort Book" in Healthy Indoors Magazine
Thursday
William Collins's video was featured

Foam Kits vs. Spray Sealants Gun

How does the Foam Kit stack up to the Spray Sealants Gun when it comes to simplicity? When you integrate the Spray Sealants Gun to a 16lb Canister, you creat...
Thursday
Scott Becnel added a discussion to the group Energy Auditing Equipment for Sale, Trade or to Purchase
Thumbnail

Brand new DucTester at a discount

Brand new DucTester at a discountI have a brand new 300 DucTester system from Retrotec for sale at…See More
Wednesday
Scott Becnel joined allen p tanner's group
Thumbnail

Energy Auditing Equipment for Sale, Trade or to Purchase

Discuss the pros and cons of the equipment you are interested in prior to purchase. Post equipment…See More
Wednesday
Lucyna de Barbaro liked Home Energy Magazine's blog post AeroBarrier: The Silver Bullet to Zero Energy Affordability, by Paul Springer
Wednesday

Photos

  • Add Photos
  • View All

© 2018   Created by Home Performance Coalition (HPC)   Powered by

Badges  |  Report an Issue  |  Terms of Service