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: 188

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

Forum Discussions

Mini-Crawl Spaces between City Row-Home's Conditioned Stories

Started by Robert Logston in General Forum. Last reply by Sean Lintow Sr 13 minutes ago. 7 Replies

Exterior green cladding

Started by Luis Hernandez in General Forum. Last reply by Dennis Heidner 11 hours ago. 1 Reply

Faces & Places of HPC19

Started by Diane Chojnowski in General Forum Apr 5. 0 Replies

high rise humidity

Started by Steve Nations in HVAC. Last reply by Dennis Heidner Apr 3. 7 Replies

Follow the action at #HPC19

Started by Diane Chojnowski in General Forum Apr 2. 0 Replies

Unvented Roof Assembly

Started by Patrick Michaelyan in General Forum. Last reply by Wallacebastien Mar 30. 6 Replies

Technology and Customer Service

Started by Kelly Caplenas in General Forum. Last reply by Franco Oyuela Mar 25. 1 Reply

Latest Activity

Sean Lintow Sr replied to Robert Logston's discussion Mini-Crawl Spaces between City Row-Home's Conditioned Stories
"First off it is called an interstitial space - a crawl space is located in only one area of a…"
13 minutes ago
Dennis Heidner replied to Luis Hernandez's discussion Exterior green cladding
"Why do you feel the planks are too old?  Are they falling off themselves?  Cedar siding…"
11 hours ago
Al Tibbs shared Don Fugler's discussion on Facebook
13 hours ago
Daniel Baur-McGuire replied to Robert Logston's discussion Mini-Crawl Spaces between City Row-Home's Conditioned Stories
"This sounds like a job for AeroBarrier and AeroSealing. Both products will seal the issues from the…"
15 hours ago
Daniel Baur-McGuire commented on Joe Hughes's blog post Christine Oliver, M.D. – Odors, Multiple Chemical Sensitivities and More an MD’s Perspective
"One of the best building science podcasts! I have learned so much from listendign to this…"
15 hours ago
Anna Stern is now a member of Home Energy Pros Forum
16 hours ago
Pearl Certification posted blog posts
17 hours ago
tedkidd commented on Diane Chojnowski's blog post How to spur home energy upgrades? Persuasive assessment reports
"I was a respondent. The reports I saw seemed tailored to the things utility programs care about…"
17 hours ago

© 2019   Created by Home Performance Coalition (HPC)   Powered by

Badges  |  Report an Issue  |  Terms of Service