Asphalt shingles are one of the most popular choices of roofing materials in the highly competitive residential roofing market filled with various options. They usually come in two variants – the 3-Tab shingles and Architectural or Dimensional shingles.
The 3-tab shingle is the most basic and least expensive option. However, architectural shingles are often used to improve the curb appeal of many old homes that need makeovers. In addition, these properties would have additional protection and increase the lifespan of the entire house.
No matter how durable your roof, it will start failing at some point so you should begin researching your options for the best deal. Re-roofing saves homeowners the cost, trouble, and risks associated with a tear-off.
Re-roofing with 3-tab shingles are pretty straight forward. The standard practice is to limit to a total of two layers of shingles. After that, you should tear-off old shingles before installing a new layer.
While both types are made up of the same essential components, re-roofing over architectural shingle is a different case altogether. Technically architectural shingles can be re-roof over existing architectural shingles. The real question is, should you?