Quick Answer: Can I Put New Roof Over Old Roof?

Should old roof be removed?

If any areas of the roof have become severely damaged, it’s usually better to remove the old shingles and start from scratch.

If you’re going to add a roof on top of an old one, it’s a good idea to remove any loose shingles and apply a new layer of 30-pound roofing felt before laying the new shingles..

What is the difference between re roof and new roof?

Most building codes define the options as follows: Reroofing: The process of recovering or replacing an existing roof covering. … Roof Replacement: The process of removing the existing roof covering, repairing any damaged substrate and installing a new roof covering.

What is a roof overlay?

An overlay roof, or the act of overlaying a roof, is when your roofer puts a second set of shingles directly on top of your existing roof. While this isn’t the most common method of roofing, it does happen, especially when homeowners are hoping to save a bit of money on their overall roofing costs.

How much does a roof cost for a 2000 sq ft house?

A new asphalt shingles roof for a typical 2,000 sq. ft. single-story ranch house can range in price from $8,500 to $16,500 fully installed. Across the US, a typical architectural asphalt shingle roof will cost between $3.50 and $5.50 per sq.

How do I know when my roof needs to be replaced?

7 Potential Signs That Your Roof May Need To Be Replaced:Asphalt roofing shingles with curled edges. … Cracked asphalt roofing shingles.Visible signs of aging on a 3-tab asphalt shingle roof.3-tab asphalt roofing shingles with algae/dark stains.Moss growing on asphalt roofing shingles.More items…

Is it OK to put a second layer of shingles on a roof?

Examine the edge of the roof to make sure there’s only one layer of shingles currently installed. In most areas, building codes allow for up to two layers of shingles installed on a roof. Any more than two layers of shingles can be too much for the roof to handle even if the local building codes don’t outlaw it.

Does flashing go over or under shingles?

Instead of installing the step flashing between shingles, the flashing rests on top of the shingles. It’s not unusual to see sealant installed when sidewall flashing is missing.

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.