Is it wise to reroof over architectural shingles ? :?
no to many voids
dont like it.
can be done.
no don’t do it. it will look like crap (wavy & bumpy) and it will void your manufacture warranty.
Why would you want to do it? You aren’t really saving a whole lot of money by not removing them - I don’t know where you are, but in Central Texas, a 30 square roof is going to save only around $ 450 - 500 in labor costs.
Like the post ^ said; too many voids. Wouldn’t do it. Plus, it’s a lot of weight.