Hurricane Laura did a number in the area and I received some roof damage. Im exploring putting a metal roof on my shop behind my home. I lost quite a few shingles and some decking. Is it worth the price to try and do this myself and do I need to remove the existing shingles that remain? The cap is gone as well.

Also whats the expected life on asphalt 3 tab shingles? My insurance said 15 years.

Any way please show cost and if this is something I can do myself?

 

You might find some slumlord who would apply purlins over the existing roof and then sheet it with metal... but IMO, yes, you should remove the shingles. Any roofer worth his salt would put down a high temp ice and water shield over the entire roof to make it leakproof (it adheres directly to the sheathing) before putting on the metal roof. This also ensures the fasteners never leak because the membrane is self sealing. You would really have to know what you are doing to DIY. This is your house, not a shed or barn, so you simply CANNOT make any mistakes.

3 tabs often are sold as 20 year... very rarely 30 year, depending on the grade of shingle. But that does not mean they will last that long. Most roofs in the Midwest are ruined by hail before the shingles reach a ripe old age.

We are not in the habit of doing your homework for you when it comes to prices.

 

You definetely need a waterproof layer below your metal roof. They often get condensation on the bottom side and you need to prevent that from getting into the building. With an old roof in place, especially with bits missing it's harder to do a good job with that barrier. Plus, it's always a good idea to get unneeded weight off the roof.

As for shingle life. I usually see about 3/4 life of what the shingles are "rated" for. So, south facing 20 year shingles are usually due for replacement by the time they hit 15 years.

 

Xsleeper that comment was uncalled for I wasn't actually asking for you to go out to the store and buy this for me I'm asking what the average cost my being trying to compare what the better solution will be for this situation. I'm not a contractor I'm just an individual trying to save a little money when doing repairs to my home.

 

Chill, you're the one who doesn't even realize that you haven't told us the size of the roof, where you are located or what roofing you want to use. You've provided nowhere enough info to even guess at a price. And, construction materials have skyrocketed in price recently. Last week's price is useless. Since you said you were doing this yourself the project is going to be all material cost. Pick the roof you want to use, figure how much you need and get a price from suppliers in your area.