Roofing questions.....

[Bill Douglas]

Baz I got my roof replaced with aluminium about 13 years ago. Mine is .9mm pure aluminium that looks like corrugated iron. No corrosion/oxidization showing up, and it get a fair ole dousing of salt. I'm happy with it.

[crb07]

crbo7 - Is it common practice in your area to put plywood between two moisture barriers ? Does that moisture barrier breathe? If humidity can't escape, the wood will rot. Seen it quite often around here in walls, before tyvek, people were putting a plastic vapor barrier behind the sheetrock, combined with tar paper under siding, walls would retain moisture.

I don't think many companies are doing this. I looked at a lot of info online and liked the idea of having the foam sandwiched between plywood.

There may be some issues with spray foam on the underside of plywood in the attic. This was something else I looked at but there are complaints of moisture getting in between the spray foam and the plywood in the attic. I believe most metal roofs in the north west have an air space under the metal to keep condensation out of the house. I know a house built in the north Georgia mountains with timber frame construction covered in foam panels with plywood on either side of the foam panels. The builder put an air space under the metal and there has been no issues with moisture in the house. The drywall is screwed directly to the underside of the plywood on the foam panels. That is the one thing I wanted to do but could not find a roofer to do it is put an air gap under the metal. Someone out west is probably familiar with this.

[crb07]

The back roof over the porch is still cold role asphalt, I hope to put something better down when the time comes to replace that again.

Jims, there are some really good heat reflective white paints that are also really good at re-sealing flat roofs. They will extend the life of your roof as well.

[Jims5543]

Originally Posted by crb07

The back roof over the porch is still cold role asphalt, I hope to put something better down when the time comes to replace that again.

Jims, there are some really good heat reflective white paints that are also really good at re-sealing flat roofs. They will extend the life of your roof as well.

Yes, they have really come a long way with coatings, something I will look into when the time comes.

That flat roof is about 7 years old now, guaranteed for 10 years, in about 2 years we will be looking into replacing it.

[Baz]

Updating the thread.......

Today I stopped at our local building dept and picked up the permit application for my re-roof. I also stopped at a roofing supplier in Port Orange (next city north of me) to request a quote for aluminum .032 standing seam 16" wide panels and all the rest of the materials needed to do my 55' long by 35' wide roof open gable roof.

I have a crew to use for the tear off (asphalt shingles) down to bare wood and a crew to use for installation of new material plus quotes for both.

I will share cost info soon but for now wanted to post a quick update.

My roof is only 20 squares and a low slope single story so should be fairly straight forward to do. My installer said the tear off would be done in one day and the installation maybe two days.

The installers just finished a roof just around the corner on a new home using the same material. I watched them doing that job and they are very good at what they do.

I did get a quote from a local roofing company who are very reputable but that quote was way higher than I expected and so I'm going in this direction now and am happy I'm making the right decision.

Took this pic from my roof last night - the house they did is at the upper right corner of the pic.

[Baz]

Since my previous post I contacted one of the main suppliers in the area and it took over a week to get a quote and never did get anything in writing with specs....just a ballpark figure. So I contacted another reputable supplier today and got two quotes back by late afternoon. One for Gavalume for $4,400 and the other for aluminum for $7,200. This includes tax and delivery to my property.

Both for standing seam (striated) .24 Gauge for the Gavalume and .32 for the Aluminum.

For the difference in cost I will go with the aluminum - pretty much a no-brainer - especially considering how close I live to the ocean with salt air corrosion being a concern for anything metal.

This company really did a nice job with the quote. Everything line itemized even down to the shipping and crating fee. Stainless fasteners included along with sealant, drip edge flashing, gable/rake trim, ridge cap, and some other odds and ends.

I will still have to buy underlayment but that's no biggie.

I'm filling out my permit right now and will call my install crew tomorrow and check their schedule.

This is what I will be using - the bottom one with striations:

[Baz]

Another update.

After adding everything up and comparing doing the job myself vs. hiring a contractor, I decided to let the contractor do the project. I know I could have done it myself, but in the end I feel this will be less headaches for me (that's certainly worth something) and also I will get a 10 year labor warranty on his work. The manufacturer has a 30 year material warranty.

So they started on Monday with the tear off and dry in and finished up today.

The metal was delivered this afternoon and they will install tomorrow.

They did some wood replacement along with the tear off/dry in and I'm happy to have that done.

Here are a few pics:

[rfuerst911sc]

That's a lot of metal ! Good call to have it installed .

[Baz]

Originally Posted by rfuerst911sc

That's a lot of metal ! Good call to have it installed .

Thanks - I know you have gone through the same mental exercise on your improvement projects.

One of the factors I didn't mention but loomed large in my mind was if a worker got injured I didn't want to be on the hook for it.

Contractors have workers comp (60% for roofing contractors!) so even though my project is not very risky at all - you never know and no one can predict.

Also - those sheets are all cut to length. With my gable roof they just line up like soldiers on each half of the roof. Fairly straight forward for the installers.

[dan88911]

Not sure if it will be of any help however, "Fine Homebuilding" magazine March 2020.
Has a cover article "The Rise of Metal Roofing"

[Baz]

Originally Posted by dan88911

Not sure if it will be of any help however, "Fine Homebuilding" magazine March 2020.
Has a cover article "The Rise of Metal Roofing"

Thanks Dan - might be helpful for others - my roof should be about done by end of day tomorrow.

I chatted with the delivery driver and he said these metal roofs are pretty much all people are using for any construction near the coasts.

He said their company opened up an office in the Bahamas post Hurricane Dorian.

Their plant is located in the industrial park in Sebring. That's where the company I worked 10 years for has their Florida fertilizer plant. They have another in Ohio.

There's a whole bunch of info on the Internet on metal roofing. Also, most of these suppliers realize this is something many homeowners want to tackle themselves so some of them are set up pretty good to help the homeowner and as far as I can tell they are getting the same pricing as the contractor, which surprised me a little.

Will post more pics tomorrow when roof is done.

[Steve Carlton]

We can recommend a good expert for you.

[dan79brooklyn]

Our entire house is wrapped in gavalume.
Has held up fine during typhoons. Since the metal is long there is a slight sound during heavy winds when the metal vibrates on the exterior walls. Can’t hear rain at all. We’ve since had solar panels added to the roof. Easy install with no holes, since they could clamp the panels to the raised metal seams.

[911boost]

So funny Steve, that was a classic thread.

Looking good Baz, we see a lot of metal roofs in the mountains too.

[tevake]

Is that the famous ROOFER GIRL. From P Ps past? Too funny!

Baz, so glad to hear that you found a good crew to do that roof for you,
I had thought many times of volunteering to come down to help you with that job.
Whew a close one. ��

Very interesting design Dan!

Cheers Richard

[rfuerst911sc]

If the crew Baz has hired is anything like the crew I hired here in Ga. he will be amazed how quick/clean the install will be . I now have my house , my two car man cave , an RV parking structure and a parking garage for our daily drivers all with metal roofs .

My crew had one guy on the ground and three on the roof . Roof guys barking out dimensions for cuts or holes to be cut to the ground guy. Ground guy was excellent with his precision on straight/angled cuts and hole cuts for vents. They get into a rythem and become an installing machine ! For me it was fun to watch .

[billybek]

I was wondering yesterday when Roof Girl would pop up on this thread!
Thanks for reposting the photo. A classic!

[Baz]

Originally Posted by Steve Carlton

We can recommend a good expert for you.

LOL.....roof girl!

I wish I could find that thread again. It was hilarious!

[Baz]

Originally Posted by dan79brooklyn

Our entire house is wrapped in gavalume.
Has held up fine during typhoons. Since the metal is long there is a slight sound during heavy winds when the metal vibrates on the exterior walls. Can’t hear rain at all. We’ve since had solar panels added to the roof. Easy install with no holes, since they could clamp the panels to the raised metal seams.

Pretty cool, Dan!

Gavalume is used here a lot. I went with aluminum to help with corrosion issues.

[Baz]

Originally Posted by 911boost

So funny Steve, that was a classic thread.

Looking good Baz, we see a lot of metal roofs in the mountains too.

Thank you, boost.

Exited to finally get this checked off my list!