QC: Montreal/South-Shore who replaced flat roof recently? share

[Oleg Mitsura]

Hello,

I'm pricing roof replacement for a flat roof that has drainage slope issue.

How much does it cost? Is there a cheaper solution than ordering foam pads to redo the slope of the roof?

I've seen a video of flat roof repair where they built a channel for the water drainage, but I wonder if there' something in the northern climate that would not make it practical?

Is it possible to add more drain holes in more places?

It's a big expense, please share your experience.