Question: Is It OK To Reroof Over Old Shingles?

Is it better to remove old shingles?

When Tearing off the Old Roof Is a Better Option There are already two layers of shingles on your roof – Most building codes only allow two layers of any type of roofing on your home.

But if the current roof is curling, this isn’t possible.

You’re better off removing the old roof..

Should I tear off my old roof?

Why Tear-Offs are Almost Always Necessary In most cases, more than two layers of roofing shingles does require a tear-off. Laying new shingles over old shingles is easily prone to leaks and reduces the life of the new shingles. This alone ought to be reason enough to do a tear-off; it’s just a bad value not to.

How much does it cost to re shingle a roof?

How Much Do Roofing Materials Cost? It costs from $1.20 to $4 a square foot to remove and replace the roof or $1,700 to $8,400 for a typical 1,700-2,100 square foot ranch-style home, with a gentle slope. The cost per square foot for a wood shingle roof is between $6.37 and $8.77.

Can you put 2 layers of plywood on a roof?

you can have 2 layers, whats the thickness of first layer of ply? I would get rid of felt to see what condition of first layer is… Existing 1/2″ plywood and tar paper, shingles were removed…the roofer is installing new 1/2″ plywood and tar paper over the entire roof “on top of” the old.

How do I know if my roof deck needs replacing?

Here are some signs your roof decking may be damaged:Shingle curling and buckling.Granular wear to shingles.Holes in the roof.Mold or mildew in the attic.Missing shingles.A spongy feel when walking on the roof.Damage round chimneys, pipes and other penetration.

How do you reshingle a roof over old shingles?

How to do itRemove Caps. Remove the ridge caps. … Remove Obstructions. Remove air vents and pipe flashings by prying out or unscrewing the fasteners holding the fixture. … Repair Broken Shingles. … Sweep the Roof. … Install Flashing. … Install Valley Flashing. … Install Starter Strip. … Cut and Install Shingles.More items…•

How long does a roof overlay last?

around 16 yearsOn average, an overlay lasts around 16 years. That said, for most shingles, the warranty is valid for the same length of time whether the shingles were used in an overlay or a tearoff.

Can you put new roof sheathing over old?

The new plywood will have to be nailed to the rafters or roof trusses. … But, with the old plywood left in place, it will be considerably more difficult to locate the rafters to ensure proper nail placement.

How long does a reroof last?

Roofs. Slate, copper and tile roofs can last more than 50 years. Homeowners with wood shake roofs should expect them to last about 30 years, while fiber cement shingles last about 25 years and asphalt shingle/composition roofs last about 20 years, the NAHB found.

How much does a new roof cost 2019?

Building a brand-new roof on a home costs $10,000 to $20,000 or more, depending on the products you use. This installation involves the cost of new framing and trusses, underlayment and shingles, and supplies and labor. Metal framing costs more than wood.

Should you replace your roof before selling house?

If there are just a few minor details needing repair, rather than a general problem with the age of the roof, then the roofing contractor can take care of those before the buyer does his inspection. This will save you money and trouble in the long run.

Can you put a metal roof over shingles?

In almost every case, the answer is yes, you can lay down a new metal roof over an existing shingle roof. This is one of the many reasons metal roofs keep growing in popularity – their installation doesn’t require completely tearing off the existing roof, which is a time-consuming and expensive job.

How many times can you shingle over a roof?

Most building codes allow up to two layers of organic or fiberglass asphalt shingles. That limit pertains to roofs with up to a 4:12 pitch. When it’s time to replace your roof, there are several factors that might lead your roofing professional to recommend adding shingles on top of your existing layers.