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i have a enclosed back porch with a single door at one end wall, sits on concrete slab when it was enclosed. door was installed with no threshold. can i install the sliding patio door so the doors threshold sits on concrete floor( door is vinyl) or do i have to put wood framing on floor for door to sit on, thanks for any help jim | |||
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You can seal the threshold directly to the slab. Use several runs of a good grade of silicon caulk. Jaybee | ||||
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