Go Back   InterNACHI Inspection Forum > Specific Inspection Topics > Roofing Inspections

Notices

Roofing Inspections Contains discussions about inspecting roofs.

Reply
 
LinkBack Thread Tools
  #1  
Old 6/28/14, 1:21 PM
Michael R. Bruchs Michael R. Bruchs is offline
InterNACHI Member
 
Join Date: Jun 2007
Location: Castle Rock, CO
Posts: 65
Default Concrete tile roof

I frequently see the right lower corners on concrete tile roofs cracked. It appears to be a weaker part of the tile that is more susceptible to damage. Should these be written up for further evaluation or is this typical and not concerning? Thanks of the opinions.
Attached Thumbnails
concrete-tile-roof-img_7637.jpg   concrete-tile-roof-img_7643.jpg   concrete-tile-roof-img_7645.jpg   concrete-tile-roof-img_7654.jpg  
Reply With Quote
Need a home inspection in Missouri? Check out InterNACHI's listing of Missouri certified home inspectors. Or, find a home inspector anywhere in the world with our inspection search engine.
  #2  
Old 6/28/14, 2:26 PM
Larry Kage, CMI Larry Kage, CMI is offline
InterNACHI Member
 
Join Date: Jul 2004
Location: NW, MI
Posts: 11,543
Default Re: Concrete tile roof

Quote:
Originally Posted by mbruchs View Post
I frequently see the right lower corners on concrete tile roofs cracked. It appears to be a weaker part of the tile that is more susceptible to damage. Should these be written up for further evaluation or is this typical and not concerning? Thanks of the opinions.
Refer it out to a qualified roofer for repair.

It looks like damage from walking on the overlap where possibly applied too tight (expanding and contracting, too) or foreign objects were not removed while installing...some kind of "high spot load" cracking is my guess.



InterNachi Awards Portal: http://co.nachi.org/inachiawards/
____________________________________________
"An Education, not just an Inspection"

Larry Kage, CMI
whis11 @ charter.net
The above post represents my personal opinion.
Reply With Quote
  #3  
Old 6/28/14, 4:12 PM
Kenton Shepard, CMI's Avatar
Kenton Shepard, CMI Kenton Shepard, CMI is offline
InterNACHI Member
 
Join Date: Aug 2004
Location: Boulder, CO
Posts: 4,605
Send a message via ICQ to kshepard
Default Re: Concrete tile roof

That's right, the lower right corners are the weakest part of the tile since they are the most exposed part of the coverlap, which is about half the thickness of the main portion of the tile. They're usually broken by footfall.
It's a cosmetic issue unless the broken section approaches a height of close to 3 inches, since the typical headlap on tile is about 3 inches. At about 2 inches, there's a double layer of tile to help prevent leakage. At 3 inches or more, there's only one layer. As broken sections approach 3 inches in height, recommend tile replacement. If the broken piece is still lying on the roof it can be glued back into place, but repair is the second best choice.

Mastering Roof Inspection, Tile Roofs Pt. 4

Scroll down to "Problems with Interlocking Edges".




Kenton Shepard, CMI
InterNACHI
Director of International Development
Director of Green Building
EXPERT WITNESS SERVICE

+52 777 154 5451
INSPECTION SERVICES WORLDWIDE
Reply With Quote
  #4  
Old 6/28/14, 5:18 PM
Scot Baker, CMI's Avatar
Scot Baker, CMI Scot Baker, CMI is offline
InterNACHI Member
 
Join Date: May 2010
Location: Modesto, California
Posts: 153
Send a message via Skype™ to sbaker2
Default Concrete tile roof

We see this all the time and Kenton's narrative covers it great
Reply With Quote
  #5  
Old 6/28/14, 7:10 PM
Kenton Shepard, CMI's Avatar
Kenton Shepard, CMI Kenton Shepard, CMI is offline
InterNACHI Member
 
Join Date: Aug 2004
Location: Boulder, CO
Posts: 4,605
Send a message via ICQ to kshepard
Default Re: Concrete tile roof

From the InterNACHI Narratives:

"[[Right corner damage]]Interlocking concrete roof tiles had a number of broken lower right corners. Tiles are thinnest at their edges where they interlock and lower right corners (the coverlocks) are the weakest and most exposed part of these thin areas. Tiles with broken corners that do not extend higher than the headlap (typically 3 inches from the bottom of the tile) can be repaired. Replacement is better. Tiles with broken corners that exceed the 3-inch headlap should be replaced by a qualified contractor."




Kenton Shepard, CMI
InterNACHI
Director of International Development
Director of Green Building
EXPERT WITNESS SERVICE

+52 777 154 5451
INSPECTION SERVICES WORLDWIDE
Reply With Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Roof inspector did not do the job right and is upset Nick nguyen Roofing Inspections 9 5/27/14 9:43 AM
Declaratory Statement Roof covering whether Tile Or Shingle is considered Primary jshishilla Florida Inspectors 43 2/9/14 11:25 AM
Shingel defect or type? jhorton1 Roofing Inspections 15 7/22/13 5:55 AM
Word count of our inspection narratives as of today tops 300,000 words. Wow. gromicko Miscellaneous Discussion for Inspectors 47 12/21/12 8:09 PM
Chimney flashing photo's needed: brick and stone done correctly kshepard Exterior Inspections 6 10/13/07 8:10 AM

All times are GMT -4. The time now is 5:49 AM.
no new posts