Roofing discussion!!!

[Blue Mule]

Pic of my roofView attachment 706828

Oh. I was thinking a standard residential home. Didn't realize you were roofing a Home Depot.

 

[Smokeydog]

I switched from shingles to steel roof 13 years ago on the log house. 26 gauge, 40 year warranty screw thru the metal. Roof deck 1” rough sawn hardwood with 1/2” plywood on top. Stripped roof and applied 40# felt under steel.

2020 cat0 tornado over house twisted off several 1’ diameter trees 20-30’ up and broke limbs all around the house. No damage to roof. Impressed.

Torque on sealing washer screws is critical for this type of roof. New type of screws that feature a cup to prevent over driving and protection to sealing washer an improvement. Probably replace screws with the new type near the 20th year.

Cost diy with some labor and materials $5K. Got an energy tax credit for half that.

Many people switching to metal roofs particularly replacement to shingles. There are many steel roof products now. Some stone covered that look like shingles or Spanish tile.

Shingles don’t last long around here. Used to be cheap and have helped many a neighbors reroof. Not cheap anymore and don’t seem to last either.

Have 22 gauge commercial metal R-panel on the barn with purlins at 2’.

 

[jthibodeau89]

BlueMule, doesn't every home have a 2140sqft party room with dance floor, bar, and karaoke stage. And a separate 1200 sqft guest suite with indoor 4 person hot tub? I thought everone had that.....LOL

That is on top of 5BR and 3.5BA of the central part of the house.

But we bought the property for the view, and the 108x48 horse barn. The house structure needs a lot of work.

 

[DieselBound]

So does yours have heeled trusses too? I don't understand the advantage to having heeled trusses over simply building the walls higher.

The idea behind heeled trusses is to provide for a more uniform layer of insulation. With standard trusses insulation ends up tapering down quite a bit as you get to the top plate area. It's this area that presents itself with the greatest energy losses in a ceiling. The heels also can provide for a really strong wall-to-roof connection: a new build/design I'm considering going with 10' walls and 2' truss heels, locked together with 12'x4' sheathing (starting to become more popular).

 

[jyoutz]

I wouldn't run metal over shingles... spend a few bucks and do it right.

There is nothing wrong with putting a thick gauge steel roof over one layer of shingles. It provides another layer of moisture barrier and simplifies roofing installation.

 

[mikester]

There is nothing wrong with putting a thick gauge steel roof over one layer of shingles. It provides another layer of moisture barrier and simplifies roofing installation.

Good advice if you live in a desert. Bad advice in southern Ontario with high humidity and cold climate with large temperature swings in springtime.

Putting a new metal roof over an old leaking shingled roof is a recipe for disaster and a great way to identify scammer contractors IMHO.

 

[ruffdog]

Metal roofing sweats under the right conditions. (humidity and temperature)
I have a shed that sweats so badly come spring that you'd think it was raining.

Air circulation is needed to evaporate that sweating.

I once re roofed a building that the contractor had placed tin directly on plywood/
That ply was black 1/2 rotted and the metal was darn close to rusted thru, and it was a mere 4-5 years old!

The ideal is spaced out furring strips over the trusses with plenty of air circulation.

Good advice if you live in a desert. Bad advice in southern Ontario with high humidity and cold climate with large temperature swings in springtime.

Putting a new metal roof over an old leaking shingled roof is a recipe for disaster and a great way to identify scammer contractors IMHO.

We too get hot and VERY humid days with cool nights that cause the night sweats (under the roof). That was the major issue that was told to me by the roofers here 15 years ago. Instead, I went with a quality asphalt shingle so maybe the next time the metal roofers had the sweat issue figured out.....maybe.

 

[Steppenwolfe]

There is nothing wrong with putting a thick gauge steel roof over one layer of shingles. It provides another layer of moisture barrier and simplifies roofing installation.

OK... I still wouldn't do it.

 

[Williy]

In Texas we put the metal roof over the shingles
no problems in 20 plus years

willy

 

[Steppenwolfe]

In Texas we put the metal roof over the shingles
no problems in 20 plus years

willy

OK... I still wouldn't do it.