Roofing 101 Amazing

Yes I know Marcel I am going back to the late 1970.
Everything we cut out we would build up with sizes cut from new shingles to make the roof plain even before the new shingles and metal fit perfectly on the plan. The cutting was the most tiring part. Chalk and EZ bar and pry nails was my job till I could hammer nails.Every square chalked lined. Second biggest roofer on island. Founded in1886 They had 30 tin smiths god knows how many men? They did BUR but 1 crew for Residential.
Thanks from the term Marcel. Nesting the shingles.
Me working in a French province , mostly immigrants speaking slang and my lose of education leave me looking for correct terminology. Its coming with help from you and others. Thanks.

You are joking, I hope. (Possible licensed roofer?)


There is a form of step flashing, may have been a much older flashing method. I was surprised not to find moisture penetration, even with infrared.
I did call for new step flashing, in the flashing section of the report.

I would have too John, and in looking at your pics, it looks like the installation of the flashing was every 3-4th course of shingles.
Most likely will not occur to change it considering the EIFS would have to be removed to do it properly.
Still good to call it out. The existing looks like crap. :slight_smile:

Please tell me whats wrong with the Shotgun method, 6" stagger. I roofed through college and a few years after (1975) and that was the standard for roof installation of 3-tab.
The stair-step method was applied by carpenters.
I was a Union Roofer at the time Quad City Ill.

John what about the dormer?
I see rusting nails where the drip edge would be. Just a couple of courses up from the starter. Is it nailed to stop the drip from movement? Was there drip? Might have been nailed incorrectly or nail pop and the drip was moving… When I see dormers I look for flashing problems right away. Specially when there is a re roof on EFIS. To many roofers do not know how to address flashing and EFIS.

Look at the hammer on #13.
I always used an axe or shingle hammer. You can not get under the last tab for that 4th nail without using your free or nail hand.
Yes Marcel I am old school also. 2 vertical lines. If a new man is with me or new crew years ago, I will place more chalk lines to make them and me feel comfortable.
I ask at roof mart if any color or batch changes have been mentioned. Little over 2 years sense last 12 or 14 SQ,roof.
Do not miss it.

Steven, what is the Shotgun method? Never heard it called that before.
The racking method will cause visual problems and missing nails and the stepping method if applied all across the roof will end up with crooked courses and a differential deminsion vertically by the time you end up at the ridge of the roof.
Every 4 course, a line should be snapped across the width of the roof and measurements taken vertically to maintain a parallel with the ridge.
By snapping two lines in the center of the roof and working each side of those lines, achieve a perfect alignment of the knockouts of the three tab shingle vertically and the rows are straight.
Of course most roofers say that you can’t see it from the ground if crooked, but I don’t work that way and the jobs I supervise, will not let it happen either. :slight_smile:

I got one for ya…

Just keep in mind, the proper installion of shingles should look like a stair step as they are put on.

Called Diagonal Stepping which can be started at the gable end or with double vertical lines in the middle of the roof working in two directions. This assures proper alignment of the cut outs in a three tab installation. :slight_smile:

I was taught, as a general rule of thumb, that you should never stack butt joints with any building material. Applies to roofing, siding, drywall and hardwood flooring.

Oddly enough Pete, Certainteed allows both the racking method and the diagonal step methods and that offsets the butt joints by 6" on both of them also.
Never seen a problem with the step method but Certainteed claims there could be visual defects with the racking method which most roofing companies choose to do, but not all of them.
I like to use the old fashion method of two lines in the middle of the roof and work both ways. You end up with equal cuts on both ends if a gable roof. :slight_smile:

Marcel the building terminology you are using, were can someone find examples of these terms and visual description to guide them so one can apply this to there narrative when creating a report and to keep for referencing material…
Roy Cooke is aiding me but others also can use help if I am not mistaken.
Roy gave me Carson Dumlop" Home Reference Book." It is amazing.
Any other book or link would be greatly appreciated by all here.

Russell H…
Good find Russell
If you do not lift and prob you will not find much on roofs and other systems in in that residential building Goes against SOP but then again it** only guide line to follow** from what I am told.

Roof SOP
1. Definitions and Scope
1.1. A **home inspection **is a non-invasive, visual examination of a residential dwelling, performed for a fee, which is designed to identify observed material defects within specific components of said dwelling. Components may include any combination of mechanical, structural, electrical, plumbing, or other essential systems or portions of the home, as identified and agreed to by the Client and Inspector, prior to the inspection process.[INDENT]
[li]A home inspection is intended to assist in evaluation of the overall condition of the dwelling. The inspection is based on observation of the visible and apparent condition of the structure and its components on the date of the inspection, and not the prediction of future conditions[/li][/LIST]

Same way I learned. Very little waste, easy to do. These are from a “new” roof last fall. They ended up getting a new “new” roof before closing.

Clean finish Dough.
I have always used metal valleys. Have seen a hand full of woven valleys and laid 1. I think the valley wares faster and therefor an increased possibility of leaking and shortened longevity of the roof…
Ice damming is problematic on 3 and 4 twelve roofs to start with so woven and laid in valleys would be a worry… It is only an opinion. I can not back it up with fact yet.

Part of the same roof. It was a real piece of work. Didn’t get any grief from the sellers though. They just fixed it. I went back for a reinspect and they did a cut valley. We seldom see a metal valley here. The only kinds of dams we get are leaf dams, but many don’t know they can cause leaks as well…and rot.

That’s what I like about using lines for referencing your starter and run.
I have seen a roofing deck that the gable ends not mach up in length. Offset by xx inches. We measured because you knew when you got to the ridge the shingles would be offset. We cobble each shingle 1/4 the last 12 courses.
I only looked for guys that were invested and well trained.
When I was drinking in excess and spiraling down I worked for bums till I had enough to regain my composure and wake up.
Look in Quebec shingling is not observed unless complaints are made to the RBQ.
Lots of bad jobs to say the least.
Roofing is the second to last trade from the bottom and demands the shortest amount of time to become a journeyman. Roofing attracts hardened man with low educational skills and you make good money.
Look not everyone is painted with that color but a great percentage are.

Doug, that photo is exactly what I was trying to explain.
Thanks, that is a good example of an improperly installed roof covering.

And Robert, you can order your Shingle Applicator’s Maual from Certainteed here;

That will give you all the illustrations of proper installation of various types of shingles in the trade. :slight_smile:

Thanks Marcel. Your the king.