Here are the 3 things you need to consider before installing solar on an old roof


If you’re thinking about going solar, one of the questions you may have is what happens to your panels when you need to replace your roof.

Some companies say that if you do need to replace your roof they will remove and reset the panels at no cost to you. However, it can sometimes be very difficult to get the company to live up to their promise when the time comes, especially in an age when companies come and go so easily.

If your roof isn’t brand new you can still install solar and get many years out of your current roof, however, if your shingles are curling and your underlayment is turning to dust then you must absolutely plan to replace your roof before installing a solar system.


At Impact Solar, our recommendation is: if you are in need of a roof within the next 5 years, you should without a doubt address the concern before installing solar on an old roof and creating a future headache. Depending on the material, a new roof can range in price from $4 to over $10 per square foot. So, it’s important that you factor in the cost of a new roof when deciding to put solar on your home.

Believe it or not, solar panels can help protect your roof and extend its life. Many roofs have a lifespan of 20-30 years but with solar panels they often last much longer. The average lifespan of a solar panel is about 25-40 years which means that you may never have to replace your roof if you go solar!

The way solar panels help protect the roof underneath is by shielding the shingles/tiles/underlayment from sun’s ultraviolet rays and heat. So, if you are concerned about your roof’s longevity, solar may actually be a good option for you!


If you keep asking yourself whether or not installing solar on an old roof is worth the effort and cost, it may be pertinent to look at the situation from a different perspective.

If your roof is in good condition and can handle the weight of the panels, then there should be no problem and solar is a no brainer… However, if your roof is not in good condition then you will need to consider replacing your roof regardless if you go solar or not, so the cost of your roof replacement shouldn’t affect your decision to go solar!

If your roof cannot handle the weight of the panels due to construction type then a ground-mounted solar system may be the most logical choice for you.

Ultimately, the decision is up to you!

If you’re considering going solar and have any questions about whether or not you need to replace your roof first, contact our team of experts today, we would be happy to help you make the best decision for your home.