You got Grego I belive that you must tell them this way they could go messure where it goes then make the needed adjustments. We asked on doors they said the same first measure then install
Lowe's installs quit a few different products, I work at one of their stories and sell a lot of door and window job's
They usually have people that can be contracted for work like that. You may be better off asking for referrals from friends, so you know in advance who will be doing the work.
Yes n they will have a contractor install it
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