How Many Layers of Shingles Are Allowed on a Roof?

Every property owner should be aware of the symptoms of a roof nearing the end of its life. Signs to look out for include shingle loss, consistent leaks, and mold growth. Observing any of the mentioned problems indicates that your roof is old and requires replacement.

Roof replacement does not necessarily mean stripping off the entire roof structure. It can be as simple as applying new, healthy shingles to your current structure, improving its condition significantly. Replacing the shingles is a cost-effective alternative for structures with intact sheathing and shingle structures. Read on to find out how many shingle layers should be on a roof.

How Many Layers of Shingles Are Allowed on a Roof?

The maximum number of layers of shingles allowed on a roof is two for house roofs. Property owners prefer additional layers without excavation as it can save them up to $1,000 in labor costs. Layering also guarantees advantages like a more stable structure and an improved appeal to your overall property.

Are There Benefits to Adding Multiple Shingle Layers?

Two layers of fiberglass asphalt or organic shingles are the recommended limit by most building codes. This figure limits all roofs to a 4:12 pitch and other options in its class. There are factors to consider when replacing your roof that might contribute to your contractor suggesting you add extra shingle layers.

One of the main reasons for adding extra shingle layers is to cut down on costs. Leaving the old shingles on your roof structure will help you manage your labor costs and minimize disposal costs. A complete roof tear-down will cost you $1,000 more than adding extra shingle layers to your structure.

Am I a Good Candidate for Re-Roofing?

Not all situations qualify for the addition of an extra layer of shingles; some require a full roof tear-down. You cannot add another layer if your roof has two shingle layers, since the law limits you to only two. You will need to tear off your roof and replace the shingles.

Working with a professional will help you complete your projects successfully and within the law. Although you have to save when adding an extra layer of shingles to your current roof structure, it is not always the ideal course of action.

When To Consider Re-Roofing

It is every homeowner’s responsibility to maintain their roofs. The maintenance routine for roofs is simple and reasonably quick. However, you must pay close attention to its condition to avoid time-intensive and resource-consuming complications. Reach out to a professional to schedule an appointment when you observe;

  • Curling, buckling, or blistering shingles
  • Missing or broken shingles
  • Cracked caulk
  • Missing granules on shingles
  • Damaged gutters

You cannot have more than two shingle layers on your roof. Attempting the roof renovation project on your own might save you money but will expose you to serious harm or damage to your roof. Contact Dowd Roofing Co for more information on shingle layers and your entire roofing structure. We offer commercial and residential roofing and guarantee you benefit from over 35 years of roofing experience.