New roof question

[mikester]

Either way works. As long as it’s done correctly.

If correct means minimizing the chances of leaks then metal flashing in the valleys with ice and water shield underneath extending at least 3 feet on each side of the valley.

If correct means taking short cuts and spending the least amount of time and money on materials so you can get away asap and cash your cheque and you provide a tail-light warranty then everything under the sun is good enough.

 

[jyoutz]

If correct means minimizing the chances of leaks then metal flashing in the valleys with ice and water shield underneath extending at least 3 feet on each side of the valley.

If correct means taking short cuts and spending the least amount of time and money on materials so you can get away asap and cash your cheque and you provide a tail-light warranty then everything under the sun is good enough.

There are plenty of fly by night roofers. I took the step of saying good by to shingles that crack and blow off in the w. I have a metal roof now.

 

[paulsharvey]

I like metal, and depending on prices at any given time, and the shape of a roof; metal can be cheaper. One thing to keep in mind, a "life time" metal roof, doesn't mean life time without leaks/maintenance. Fasteners can back out; rubber seals can dry rot, metal can expand-contract and waller out the screw holes, leaves can build up and cause water to sit, and work into the seams.

 

[spitter]

Considering that the only way you can do a valley on a Cedar Shake or Slate roof is to have metal flashing I would say it is common practice. We have done many a high-end home with Cedar Shake, Slate roofs and all copper flashing and gutters. End product is stunning.

 

[newbury]

It's been 15 years ago; but we used to use 18" roll galv 26ga metal, rolled down the valley, and it wasn't really an exposed metal valley, but it wad there. Problem is, 18", minus atleast 1" of each side, your only 6" on either side, which probably isn't enough to do much. Peel and stick, 24", has the advantage of sealing the nails too, where metal didn't. We never used alum or preformed valleys, back when I was doing shingle roofed apartments.

When I redid my roof, it was peel and stick and weave. Note; my roof is a 4 in 12, no snow load, but wind zone of like 130mph (I pulled that out of my butt, it might be 110 mph?)

I think proper metal valleys are more important where there is deep snow and ice. In northern Vermont we got about 100" of snow a year. In northern Mississippi we get about zip to 3". We got a LOT more ice dams on the roof in Vermont.

 

[oosik]

The wife and I built our PanAbode cedar timber home in 1982. We did it all ourselves except the septic system, the well and the carpeting in our living room. I paid a roofer to come out and show me how to shingle the roof. He was here two days and I spent the remainder of a week completing the job. He never told me about knee pads. It took me three days for my knees to scab up.

So....after 25 years and while the original roof was still in good shape - I had the entire roof - reroofed. They used 50 year architectural shingles. They went on right over the original shingles. No way was I about to go thru that misery again. AND - since I did fall off the roof during the build in 1982 - I did not want to experience that again either.

The guys putting on the new roof said my weave pattern in the valley was great. They did the same and its been just fine for going on 19 years now.

 

[ultrarunner]

Considering that the only way you can do a valley on a Cedar Shake or Slate roof is to have metal flashing I would say it is common practice. We have done many a high-end home with Cedar Shake, Slate roofs and all copper flashing and gutters. End product is stunning.

If I had copper valleys my roof would still be good.

At another address I treated the shake with an oil product for shake and that roof was the subject of talk in the neighborhood for longevity.

It lasted more than double of the others and when it was finally replaced some neighbors were on their third roof...

A little prevention can go a long way...

Wood shingles no longer allowed due to fire risk and insurance issues but shake roofs really did look nice when shake was required.

 

[paulsharvey]

I know it is probably a regional thing; but are we really talking about Wood shakes and slate roofs in 2024? There are Far better products, including textures metal shingles, if it's for an Asteric issue. I get if it's the Vanderbilt mansion or something of historic significance, but for a home?

 

[ultrarunner]

Growing up one home had a full slate roof... a few years ago removed and now composition.

 

[ultrarunner]

My cousin is married to a copper Smith in Austria.

Copper roofs, flashing and gutters are his bread and butter and recession proof... those with money always want the best...

 

[paulsharvey]

My cousin is married to a copper Smith in Austria.

Copper roofs, flashing and gutters are his bread and butter and recession proof... those with money always want the best...

I don't disagree, and in theory, soldered copper will out last you; but the copper flashing I've seen available locally is so thin, it has to be 36 ga or something, maybe thinner, and more like a foil than a flashing. It tears incredibly easily, from foot steps, nailing, ect. Now, I have seen Old homes with something like a 29ga (maybe as thick as 24/26 ga) copper flashing. Even with 70 years on it, it was fine; but it takes special fasteners, and special care to avoid galvic corrosion.

 

[paulsharvey]

We did a club house at an apartment complex once with faux Spanish tile roof. It was a screw down metal shingle, with small brick granules attached. It did look good, and it still does 18 years later; But we spent some real time tracking leaks down, as they could appear 30 or 50 ft from the source. As I remember, all leaks were related to cock-eyed screws. It was an expensive product though, and all the apartments go a brick colored, architectural asphalt shingle roof. Personally, I prefer a clean 3 tab solid color over architectural.

 

[ConawayFarms]

Sorry for reviving this old thread. Since your roof is steep, either method should perform well. Valleys fail when water slows or backs up. Metal helps with flow, woven relies on careful install.