Heididesign Posted May 9 Share Posted May 9 HD Pro 2022 on a MAC I've attached a picture of the actual house and what I am trying ot do. I need to duplicate the existing roof and then extend out flat roof on the right and left sides. I have created three spaces but cant get them to line up. I've used room dividers but that doesn't help. I also need to keep the upper siding but changing to invisible walls eliminates it. Help! Link to comment Share on other sites More sharing options...
Jo_Ann Posted May 10 Share Posted May 10 What's the problem? And... I do not see a flat roof anywhere on the real house. Link to comment Share on other sites More sharing options...
y-g-m-n Posted May 10 Share Posted May 10 So you want to extend porch in front by covering sides with a flat roof? USe a manual roof plane and set pitch to 0. Link to comment Share on other sites More sharing options...
GabrielMacias Posted Friday at 06:07 AM Share Posted Friday at 06:07 AM For a weatherproof transition between these roof types, implement these critical steps: Structural Connection: Install double 2x ledger board on main house with 1/2" galvanized through-bolts (spaced 16" OC) Use Simpson H1 hurricane ties at rafter connections Water Management: Step flashing must extend 12" up pitched roof under shingles Saddle flashing over flat roof membrane (minimum 24-gauge galvanized) Slope flat roof 1/4" per foot toward scupper drain Material Transitions: Ice/water shield over entire flat roof deck + 3' up pitched roof EPDM or TPO membrane for flat section with termination bar at pitch transition Climate Consideration: In freeze-thaw regions, add heating cable in gutter above transition to prevent ice dam formation. Link to comment Share on other sites More sharing options...
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