Home Forums Hunting & Shooting Hunter's Campfire New roof, Slum?

House is 20 something years old. I know a new roof is on the horizon.

I see and hear of some slapping another layer of shingles on, leaving the old ones in place..

Seems like a hap hazard way of doing chit...

So, of course, my question is, add another layer or tear it all off and start over ?

Any helpful ideas would sure be appreciated ! Also any input on the felt/paper would be great.

If you can afford it, I’d probably lean toward a tear off. A bunch of houses have two layers though around here.

A lot depends on roof construction.

As long as there is only one layer already, unless your roof has structural or water damage issues I wouldn't have a problem adding another layer.
But never more than two layers, and only if the framing will support the added weight.

Metal

I'll have to look.. I know the walls are on 16'' centers also 2x6 outside walls.. Can't remember the roof right off..

If you are contracting it out, a lot of roofers will not overlay and if they do they offer no guarantee.

Tear it off, inspect the sheathing, then apply the appropriate underlayment like Ice-n-Water barrier and get a guarantee.

Some jurisdictions require complete tear off

Since it's probably the biggest investment a your life so far, you should go as cheap as possible when protecting it.

LOL

Best to tear it off. Get to bare wood, make an assessment of any questionable decking issues.

New from the decking up.

Manufactures I believe will not warranty the new roof is it doubled. Many little events can occur namely, old nails working up from beneath and cutting thru thr new shingle

Be diligent about getting all of the old roofing nails out of the deck. Go back and rehammer down the decking/plywood nails. Add a few new ones too

Tear off is the best. While your gathering information on a new roof, read up on continuous ridge vent. Put a few on and they work great. They make different sizes. Most places stock the minimal coverage type but you can order the larger type for more lap over the ridge.

^^^^^

Does a continuous ridge vent work well with 4’ of snow over it?
😂

I seen the guy was from Texas, does he get 4 feet of snow there?? In all honesty I would have to read up on the snow issue.

It was TIC.
I don’t think I’d install one here.

You will get half the life, maybe, out of that second layer. extra heat on the original layer will cause the tabs to curl, and they will curl your new shingles along with them.

Just read ridge vents and snow from Fine Homebuilding. Google it! They have a good outlook on using it.

Perfect, to the decking it is...

I live way the hell out in the country. Even so, guess it's been awhile since I've seen two layers..

No or very little snow, but the area did just go though a lot of wind and hail.. Lots of stuff destroyed...

Heck no! Insurance companies allow 2 or 3 layers.
If you go from composition shingles to metal, your home insurance company will reduce your payments!
A metal roof is cheaper than shingles.
Metal will last 50 years or more and is literally maintenance free!

The one downside to a metal roof is you'll have to sign a cosmetic rider. If a hail storm hits your metal roof and dents the heck out of it, the insurance company won't replace it unless the hail actually breaks the metal.