Many homeowners when planning to renovate the roof don’t want to get rid of the existing shingle roof.
So, the question emerges – is it okay to leave the shingle roof and install metal roofing on top?
In most situations, the answer would be ‘yes. And this is why metal roofs have become so popular since you don’t have to dismantle the old roof wasting so much time and finance on this.
Metal roofs are strong but lightweight, so the installation also won’t add up to the loading of the house structure.
If you are interested in the details of how to install metal roofing over shingles, read this guide on.
Why It Is Wise to Install a Metal Roof On Top: Benefits It Gives You
Now, laying the metal roof on top is not only allowed – in many cases, it is even advised. Here is a list of several pluses of a metal roof.
It will prevent the heat from escaping the house in the cold period of the year and make your dwelling a pleasant cool space in summer.
On the other hand, such a roof will repulse sun rays and not allow the building to absorb the heat.
While being a great solution for keeping the warmth inside, a metal roof will not get the heat trapped.
Long Roof’s Lifespan.
If we compare it to the shingle roof, it serves at least 40 or 50 years before any serious reparation or replacement is required.
Metal is the material that can boast the highest resilience to severe weather conditions such as ice storms and pounding hails giving you extra protection.
Besides, you won’t have to worry about the roof itself and whether it will stay there.
No Special Demands for Maintenance.
As a strong and reliable material, metal will still be sound for years without any fixing.
Having considered all the undoubtful pluses, we still want to warn that any type of roof works requires you to seek advice from your local zoning department and making sure that they approve of installing the metal roof over shingles.
Since some regions don’t allow residential houses to have more than 2 layers of roof, you should also know whether there is anything under the shingles.
Pay also special attention to the state of the shingle. If you suspect it of sheeting or rotting, check the roof thoroughly for these problems not to get in a way of installing a new roof.
Test the shingle for the ability to carry additional weight, and if you find out it is unable to, think of some kind of underlay beneath the new roof.
This will grant that the materials don’t contact and keep corrosion at bay. Plus, such kind of underlayment can serve as a buffer zone and prevent the granules from wearing off too soon.
Otherwise, they could contact the back of roofing panels and cause destruction.
Another method includes installing the metal roof on purlins which makes a better method for those who want to reduce the number of grooves and avoid dealing with imperfections of the shingles.