Metal roofs. What do I need to know?

[mmoses]

Getting ready to re-roof the house. My house is 1800sq ft. plus the garage and cover patio. So lets say Im roofing 3000sqft. Its an A frame no valleys or extra peaks.

I want to do a metal roof. It currently is a low pitch and a roll on roof.

My question is. Can you do a metal roof with a low pitch? Do I need to remove the old roof or can i go over it?

How hard is it? Im pretty handy could I do it myself? or do I need to hire someone?

[DOUBLE.A]

Wondering the same thing.

[bustacap]

Hire someone!!!
Make sure they tear off to the deck. Can't be sure of the condition of the deck without seeing it.
Research after you've talked to several roofers. Check the slope of your roof to see if
the panel that each roofer is suggesting meets slope requirements.

[JakeGraves]

It's not that hard to do. I have put on a couple metal roofs.
Always handle sheets from upwind side
Make sure your first sheet is lined up perpendicular to ridge line. Double check this.
15amp skill saw with fine tooth blade will cut it but will be loud
As far as going over existing roof, it would depend on condition of existing. I would personally scrape off existing and put fresh tar paper down.

[bustacap]

No exterior fastened panels and no felt. Use synthetic underlayment

[mmoses]

No exterior fastened panels and no felt. Use synthetic underlayment

why no felt roofing?

[Bullydog]

Muller installed ours right over our existing roof. Shingles and all. It's been fantastic.

[bustacap]

why no felt roofing?

Roofing felt has always been the underlayment of choice for many roofing contractors and do-it-yourselfers for many years for the use under metal roofs. It’s low cost and familiarity with the product is why it has been around for so long. The two main functions of a roofing underlayment is to keep the roof deck dry before the metal roofing material is installed and to act as a secondary weather barrier in case the roof fails for some reason. Synthetic underlayments benefits greatly outweigh that of 30 # felt. The biggest benefit of a synthetic underlayment is its heat tolerance. The temperature under a metal roof can get very hot and over time, 30# felt which is composed of asphalt will dry out quickly, leaving not much in the way of a secondary weather barrier. 30# felt doesn’t come with any kind of warranty as opposed to synthetic underlayment which can come up to a 50 year warranty. Other benefits include better slip resistance, pre-printed nailing pattern and overlap lines to speed installation, and lays very flat on hard roof areas like ridges, valleys, and hips.

10 times lighter than 30# felt
10 squares per roll versus 2 square roll of felt (less trips up the ladder)
Can be left exposed to for up to 6 months with not degrading as opposed to felt which practically starts to degrade immediately
Class A fire rating. Felt doesn’t have a fire rating
20 times stronger than felt
Can save up to 50% time in labor installation

[x1jett]

Good info.
Thanks.

[JohnS]

Yes they make a low slope panel that has high ribs with hidden fasteners. This is what. You need along with a good synthetic. Also tear off the existing roof, houses are not designed for holding that extra weight it's hard on them

[Aggiebush]

What is the roof pitch, and how many layers of composite shingles are there? As long as you only have one layer, you can install an R or U panel directly over the shingles. If you want to got with either AP or CF panels, you need to strip the shingles and install an underlayment over the decking. You also do not want to install the AP or CF on any pitch less than. 3:12. Hope this helps.

[Pushbutton2]

What about noise reduction from rain and cell signal interference?

[Atfulldraw]

have you talked to your insurance agent about changing to metal?

you should.

[mmoses]

have you talked to your insurance agent about changing to metal?

you should.

not yet. I have usaa and texas windstorm. From everything I have read I should get a discount.

[bphillips]

not yet. I have usaa and texas windstorm. From everything I have read I should get a discount.

Know that if it gets dented from hail and doesn't leak it won't be covered by insurance. To get that discount you will give up the option for cosmetic claims.