Roofing Over Old: A Smart Move or a Mistake?

When it comes to roofing, the age-old debate of whether to lay a new roof over an old one or to tear it all off and start fresh can leave homeowners scratching their heads. If you're in Savannah, GA, where the heat and humidity put roofs to the test, you might be wondering if this is the right move for your home.

Can You Put a New Roof Over an Old Roof?

The short answer is yes, you can put a new roof over an old one. However, there are some important considerations before you grab your hammer and start the project. Some local codes actually allow it, but you need to follow a few important guidelines.

Pros of Roofing Over an Old Roof

• Cost-Efficient: Laying a new roof over an old one generally costs less than a full tear-off, which is appealing to many homeowners.
• Faster Installation: Since there's no need to strip away the old roof, you can save a good chunk of time, allowing you to enjoy your newly covered home sooner.
• Less Waste: By avoiding a tear-off, you're reducing the amount of debris that goes to the landfill.

Cons of Roofing Over an Old Roof

• Weight Concerns: Most roofs are not designed to support the weight of two layers. If you're adding shingles to an already heavy roof, you could risk structural damage.
• Existing Damage: If your old roof has problems like leaks or rot, covering it up won't solve these issues. In fact, it could make them worse!
• Limited Lifespan: Adding a new layer may reduce the lifespan of your new roof. Many warranties are void if you don't strip the old one first, which could be a costly oversight.

When Should You Consider a Tear-Off?

While roofing over an old roof can be tempting, there are times when a tear-off is the better choice:

1. Multiple Layers: If you already have two layers of shingles, most building codes won’t allow a third layer. Time to rip it off!
2. Severe Damage: If your roof has serious issues—like sagging, leaks, or extensive wear—a tear-off and replacement are your best bets.
3. Upgrading Materials: If you’re considering switching roof types (like from asphalt to metal), you’ll need to strip the old roof.

The Bottom Line

Deciding whether to put a new roof over an old one isn’t just a matter of convenience or cost; it’s about ensuring the safety and integrity of your home. In Savannah, where our charming historic homes often have their unique quirks, it's always wise to consult with a professional roofing contractor. They can assess your current roof's condition and help you determine the best course of action.

If you’re unsure about the condition of your roof or if you’re considering a new roof installation, give us a shout! Here at Rain Dog Roofing of Savannah, we pride ourselves on providing honest, straightforward advice and top-notch service. Call us today at (912) 351-8326 for a free roof inspection. Let’s get your roofing project started the right way!