How often a roof should be replaced might be a simple question, however, it does have a complex answer. The National Roofing Contractors Association recommends that you should have your roof inspected twice every year; once during springtime and once during fall. Roof inspection is an easy task that you do on your own by climbing safely to the roof and using a flashlight. There are numerous signs to look out for in order to determine whether your roof needs a replacement.
• Sagging roof deck
• Leaks and water damage
• Dark spots
• Visible holes on the roof
• Missing shingles
• Mold, rot, or dampness
If you notice any of the above signs, then it might be an indication that your roof needs a replacement. In such cases, it is important to clearly understand the expected service life of the roofing materials. The previous chapters have information on the life expectancies of different residential and commercial roofing materials. You can also find out more details from your roofing contractor or manufacturer.
One of the key factors that determine how often a roof should be replaced is the type of roofing material used. A cedar roof, for instance, has an average life expectancy of approximately 20 years, however, it will require more regular repairs and replacement in drier climates as it is prone to cracking.
In case you are noticing any of the signs, then it is highly possible that your roof needs to be replaced. Having a clear understanding of the expected lifespan of your roofing materials comes in handy when you are in such predicaments.
The section below shows some common estimates that should be taken into consideration when determining how often a residential or commercial roof should be replaced:
• Asphalt shingles have an expected lifespan of 15-30 years
• Composition shingles have an expected lifespan of 12-20 years
• Wood Shingles have an expected lifespan of 20-25 years
• Rubber roofs have an expected lifespan of 30-50 years
• Metal roofs have the longest expected lifespan of 50-75 years