The tear off method is exactly what it sounds like.
Roof tear off or overlay.
Higher costs on average a tearoff roofing job costs around 25 percent more than an overlay.
It s the most established way of installing a new roof but it s not the only way.
Which is best for your home.
The old roofing also has to be disposed of properly which adds to the cost.
The tear off method is self explanatory your roofing company will tear off the existing roof and replace it with a new one.
Many people are attracted by the idea of overlaying existing asphalt shingles especially if the price quoted is lower and the contractor seems confident you don t need to tear off your old roof.
There are generally two options when installing a new roof.
It takes a lot more labor to completely remove all the existing roofing material and then replace all the layers removed.
Which method is best for you depends on your priorities and future plans so knowing the costs and benefits can help you make this important decision.
You can t examine the decking to determine if there is any damage that needs repaired.
Overlays save on time labor and disposal costs.
Tear off the old one and start from scratch or overlay a new roof one on top of the old one.
In general it is not a good roofing practice to overlay a traditional asphalt shingle roof versus a complete tear off and replacement with a new roof for the very reason you stated.
If you don t take your roof down to the sheathing you will never know if you have proper underlayment or are experiencing sheathing rot or ice or water damage.
This is because you basically get a better quality the better value of the roof and overall it makes your roof last much longer.
However the truth is so many variables have to be just right in order to make it work that it s much more likely to cost you money in the end.
It s good to know that you can only choose this option if your roof has not been overlaid previously.
There are pros and cons to both approaches.
An overlay roof occurs when keep your existing roof as is choosing instead to shingle on top of it.
In a nutshell however roof tear off method is much better compared to overlay.
Roofing tear off or overlay the question often comes up about whether an existing composition shingle roof should be torn off or if an overlay or recover is possible.
With an overlay roof you actually keep your existing roof in place and put another one on top of it.
A tear off roof is adhered after the existing roof is removed while an overlay is attached on top.