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-   -   "Inspecting Slate Roofs" online video course (https://www.nachi.org/forum/f74/inspecting-slate-roofs-online-video-course-75199/)

bamani 9/16/16 3:23 PM

Re: "Inspecting Slate Roofs" online video course
 
When inspecting a home with a slate roof, its very important to inform the client that slate roofs cannot be walked on and the inspection will take place from the roof edge, using cameras at different angles to take photos of the roof and to further view the photos to look for defects. I also inform my clients that it is very critical to select a roofer who has particular experience with slate roofs.

lbraun 9/24/16 3:33 PM

Re: "Inspecting Slate Roofs" online video course
 
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Hi,

Real slate can last 150 years or more, but it is very heavy which requires extra roof fraiming, very expensive and becoming rare and hard to find a professional craftsman to install it. A good faux slate is about 1/3 the cost, much lighter so extra roof framing is not needed and it can be very hard to tell the difference from the ground. Faux slate is typically guaranteed for 50 years and is recyclable.

lbraun 9/24/16 3:52 PM

Re: "Inspecting Slate Roofs" online video course
 
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Hi,

When inspecting slate roofs one thiing to look for is proper fastening. Fasteners should be copper or stainless and the nails should not be overdriven to the top of the slate tile due to expansion and contraction of the sheathing the tile should be able to move slightly or it can crack and break at the corner or fastener location. If the nails are underdriven they can wear there way through the overlapping tile and will be visible on the surface.

lkovacs 10/17/16 4:06 PM

Re: "Inspecting Slate Roofs" online video course
 
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I was out and about looking for some slate roofs to report on when I came across this well decorated home with a charred character resting on the chimney top! :twisted: Holidays are coming and many objects will be ingeniously placed on roof structures, to include: extension cords, lights, pumps, motors, scare-crows and an assortment of other ghoulish, ornamental or festive items. The limits of which are only ones imagination. As an inspector, need I say any more of what consequences there might be?

Attachment 158839

lkovacs 10/17/16 4:18 PM

Re: "Inspecting Slate Roofs" online video course
 
My research article was "Kickout Flashing" short and sweet and true to fact. Many homes in the dryer climates, such as the Southwest are missing this diverter flashing, perhaps an attempt to save money by the contractors or because it just doesn't rain that much therefore its not considered critical. Or poor training, installation and oversight techniques? Gutters and downspouts are however, installed but perhaps that is to please the buyers since this might be something they would expect and notice?

rcarter2 10/26/16 10:09 AM

Re: "Inspecting Slate Roofs" online video course
 
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This photo is of a slate roof in downtown Martinsburg, WV. Many missing and damaged shingles were noted on the roof. Several loose shingles were present that actually present a safety hazard, and could injure someone if they were to fall of off the roof. This area can be very windy, so it appeared that failed fasteners and high winds, and/or foot fall may be the causes of the damage. Also, excessive rust was noted on the valley flashing. I would recommend replacement of the shingles and the flashing. I would also recommend further evaluation of the chimney, which appeared to be deteriorating.


Attachment 160156

rcarter2 10/26/16 10:21 AM

Re: "Inspecting Slate Roofs" online video course
 
I read “Mastering Roof Inspections: Slate Roofs, Part 1” to complete this portion of the class. I learned that most slate comes from deposits in the NE United States, and areas of Canada that border the NE states. I also learned that slate was formed hundreds of millions of years ago, and consists of marine sediments under pressure and heat. The slate can be of different densities and colors, and be fading or unfading. Ribbon slates can be less durable, and should only be used for indoor applications.

Sophie Henderson 12/1/16 3:17 AM

Re: "Inspecting Slate Roofs" online video course
 
Hello! I really liked your story. Thank you!

sfrench 12/6/16 12:27 PM

Re: "Inspecting Slate Roofs" online video course
 
When inspecting attic spaces check for home owner electrical "UPGRADES" that are not safe. Here is an open splice that is a fire and shock concern. Wires should be joined in a proper electrical J box with clamps, secured and covered. This may be indicative of other "upgrades" by the homeowner and a red flag to be even more diligent in inspecting for further electrical problems that do not meet electrical standards. In investigation to possible missing permits may be recommended.

sfrench 12/6/16 12:39 PM

Re: "Inspecting Slate Roofs" online video course
 
Aluminum wiring can be a problem in homes built from 1965-1973. Aluminum wiring was introduced due to the higher cost of copper wiring. The problem with the aluminuum wiring is it has a higher resistance to current flow, the next higher gage wire has to be used, its less ductile...tends to break when bent, has tendency to corrode if damp creating a poor connections and overheating. It has a tendency to continue to deform if over tightened. It is prone to loosening on heating and cooling and has a vibration issue. Aluminum wiring though multiple solutions appear to be offered the only one fully approved is a special crimp tool to crimp the aluminum to a copper piece at all joints. Repairs are not inexpensive and critical to insure a safe home.

jgollaher 12/7/16 5:15 PM

Re: "Inspecting Slate Roofs" online video course
 
Great course inspecting slate roofs. In california we dont see many if any slate roofs. Atleast in my years of inspecting. Great info regarding the installation methods and ways to identify trouble spots. Great example on how slate should be cut, fastened and trimmed out.

jgollaher 12/7/16 5:20 PM

Re: "Inspecting Slate Roofs" online video course
 
Great course, I am used to seeing slate in bathrooms or at porch exteriors as trim work. Good to get some knowledge about the difference of roof slate materials. Great pointers for identifying defects or possible issues with roof installs and the way they terminate to walls. Great course.

rpacker 1/15/17 3:15 PM

Re: "Inspecting Slate Roofs" online video course
 
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My inspection image was of a relatively new home with a slate roof. The slates were a standard size, laid out in a standard pattern. The roofing was not old enough to show signs of weathering. I inspected the roof from a ladder at various locations around the perimeter.

rpacker 1/15/17 3:30 PM

Re: "Inspecting Slate Roofs" online video course
 
For my research topic I want to specifically focus on the ninth part of the Mastering Slate Inspections articles (https://www.nachi.org/slate-roofs-part9-128.htm). This portion started on the actual inspection portion rather than slate roofs and styles. There was a lot of good information, including a good reminder to not walk on slate roofs during inspections due to possible damage. I was surprised to learn that gutters on very old homes with slate roofs were occasionally routed to the plumbing waste system of the home. I would never have known to look for such a system.

Kal tech 1/16/17 2:32 AM

Re: "Inspecting Slate Roofs" online video course
 
So lovely topic continue postings.
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