Quick Answer: How Do I Know If My Roof Deck Needs Replacing?

What causes roof decking to warp?

Common causes include: Uneven Rafter Levels: If a roofer installs a roof deck without ensuring the rafters are even, warping often occurs.

Water Damage: Plywood in a roof deck creates a warped effect when holes in the exterior allow water inside your home.

Poor installation may also create movement in the plywood..

Does insurance pay for new roof?

Most home insurance companies take the age of the roof, the area where you live as well as the weather condition in the area before they decide that they will pay for its repair or replacement; thus, it is important that you are aware of all these specifics.

How much does a new roof cost 2019?

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.

How long does a 30 year roof really last?

When manufacturers talk about 30-year shingles, they are talking about shingles that are designed to last between 17 and 23 years, depending on whether or not you have your roof regularly inspected and repaired and depending on the weather conditions in your area.

How much does it cost to fix sagging roof?

Most home owners spend between $300 and $1,100 for a roof repair, or an average of $650 per repair call. Typically, a job is to repair leaks. Seal the leak, replace shingles, seal the shingles. If there is a small area and few shingles being repaired, it will likely be on the low end, or as little as $150.

How can you tell when a roof needs replacing?

7 Potential Signs That Your Roof May Need To Be Replaced:Asphalt roofing shingles with curled edges. (©Copyright 2007 Haag Engineering)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.Asphalt roofing shingles with missing granules.

Should I replace the plywood on my roof?

In most instances, unless you have water damage or 3/8 plywood, there is no definitive answer weather or not the plywood needs to be replaced until the shingles are removed. … You can usually get away replacing portions 3/8 with 7/16 osb or 1/2″ cds plywood, but 5/8 would likely noticeable.

Can you put new plywood over old?

As long as the new plywood itself can span the distance and carry the roof, wind, seismic and snow loads for your region, adding new ply over old is just fine. The new plywood thickness should be at least equal to the exusting plywood thickness.

Can you roof over wet plywood?

A: It is never a good idea to install a roof over wet plywood or any type of roof sheathing. … Installing shingles over wet decking also will void any warranty you might have from the shingle manufacturer. Most roofs’ rafters are set 2 feet apart and the plywood decking should be a minimum of 7/16 of an inch thick.

Why does my new roof look wavy?

The most common reason why your shingles might be wavy is that your house is new. … Felt paper is placed right before the new layer of shingles is placed in the roof. If ever this paper is exposed to humidity, then it will form bubbles that will eventually cause your shingles to warp.

Why does my metal roof look wavy?

Standing seam metal is gaining popularity with homeowners as a durable, roofing alternative. One issue that occurs with metal roofs is oil canning or stress wrinkling — that wavy appearance you see in the roof panel on the left side of the above photo.

How often does roof decking need to be replaced?

As plywood lasts about 30 to 40 years and we run the risk of delamination and required replacement in a few years. The other two have stated that as long as the plywood is good and stays dry, it can last forever.

Why does my roof feel spongy?

Inadequate attic ventilation can also cause your shingle roof to feel spongy or bouncy. Without good attic ventilation your roof gets extremely hot. And that extreme heat can damage both your shingles and the wood decking below them and causing your roof to feel soft when walking on it.