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Old 05-20-2018, 06:35 PM   #1
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Cutting popout roof


I'd like to install a new window to increase ventilation & install a new window a/c in this room as the long window in the picture doesnt open. The only way I'd get an ideal window placement is if I cut through the popout roof. I have 2 options for locations but both require cutting the roof.
The Left pic would allow me to install a window of about 34"w. The Right side allows for a bigger window but am concerned removing the roof support.

How feasible is this project? Has this been done before? What do I need to be mindful of?What tools would I need?
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Cutting popout roof-popout-window-w-side.jpg   Cutting popout roof-popout-window-e-side.jpg   Cutting popout roof-popout-roof-support.jpg  
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Old 05-20-2018, 06:57 PM   #2
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Re: Cutting popout roof


#1,That's a shed style roof not a "pop out".
Location would be a big help.
Lot's of things can cause this area to be to hot.
Lack of enough of enough insulation in the rafters.
No ridge vent and or soffit vents.
Are you trying to cool just the garage area?
What's on the sides of the garage, any windows?
Last thing I'd be doing is cutting into that roof area.
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Old 05-20-2018, 07:12 PM   #3
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Re: Cutting popout roof


What is under the shed roof? A door, storage for outdoor stuff? If the latter, why not remove it completely if it isn't serving a good purpose.
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Old 05-20-2018, 07:14 PM   #4
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Re: Cutting popout roof


Quote:
Originally Posted by joecaption View Post
#1,That's a shed style roof not a "pop out".
Location would be a big help.
Lot's of things can cause this area to be to hot.
Lack of enough of enough insulation in the rafters.
No ridge vent and or soffit vents.
Are you trying to cool just the garage area?
What's on the sides of the garage, any windows?
Last thing I'd be doing is cutting into that roof area.
Thanks for the clarification. Yes, I'm trying to only cool the room in the summer. This is a converted garage, south facing wall. It's the shadiest part of the house. There's a line of tall trees just south of the property. The window in the pic is ~95" x 16" and doesnt open. There's a small window on the opposite side. The hot air just sits in there while the rest of the house cools down at night.
Why wouldnt you recommend cutting into that roof? It's not that big. I dont have the exact measurements on hand but I'd approximate it's 3' deep x 15' wide.
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Old 05-20-2018, 07:15 PM   #5
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Re: Cutting popout roof


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Originally Posted by chandler48 View Post
What is under the shed roof? A door, storage for outdoor stuff? If the latter, why not remove it completely if it isn't serving a good purpose.
There's a small storage area underneath that I currently use. Not sure why the previous owners extended the roof for it.
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Old 05-20-2018, 10:50 PM   #6
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Re: Cutting popout roof


Cutting the roof back is no big deal but the roofing will want to be that little bit wider than the sheeting like now so cutting the sheeting might be tricky but not impossible
If there is no joins in the rafter above you likely don't even need a header.
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Old 05-21-2018, 02:19 PM   #7
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Re: Cutting popout roof


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Originally Posted by Nealtw View Post
Cutting the roof back is no big deal but the roofing will want to be that little bit wider than the sheeting like now so cutting the sheeting might be tricky but not impossible
If there is no joins in the rafter above you likely don't even need a header.
That's good to know. Is a reciprocating saw & or circular saw adequate to cut through that roof?
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Old 05-21-2018, 02:22 PM   #8
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Re: Cutting popout roof


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Originally Posted by chandler48 View Post
What is under the shed roof? A door, storage for outdoor stuff? If the latter, why not remove it completely if it isn't serving a good purpose.
I need a portion of the roof that covers the storage closet that juts ~2ft out from the house.
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Old 05-21-2018, 09:44 PM   #9
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Re: Cutting popout roof


Quote:
Originally Posted by Nealtw View Post
Cutting the roof back is no big deal but the roofing will want to be that little bit wider than the sheeting like now so cutting the sheeting might be tricky but not impossible
If there is no joins in the rafter above you likely don't even need a header.
If the top of the wall is flat surface I would set the depth on the circular saw and cut from below so you, finish top and bottom with a multi saw.
Pre cut the roofing 1" bigger If you run the saw with the 1 1/2" side of the table against the building. when done a fascia will fill the ! 1/2 space under the sheeting.
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Old 05-23-2018, 01:06 AM   #10
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Re: Cutting popout roof


Quote:
Originally Posted by Nealtw View Post
If the top of the wall is flat surface I would set the depth on the circular saw and cut from below so you, finish top and bottom with a multi saw.
Pre cut the roofing 1" bigger If you run the saw with the 1 1/2" side of the table against the building. when done a fascia will fill the ! 1/2 space under the sheeting.
I'm trying to follow what you're saying...
Start the cut with the circular saw at the top by the wall & follow the cut to the bottom edge of the roof.
Finish any cutting with a multi saw... correct?
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Old 05-23-2018, 05:43 AM   #11
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Re: Cutting popout roof


Locate matching roofing, or plan on reroofing the overhang. That way you don't have to worry about messing it up. What Neal is suggesting will save your roofing for a 1" overhang, but may result in being a PITA. You have too much stuff to cut.....fascia decking, roofing, etc. Remove everything on the side you want to reduce, including framing lumber and all the roofing. Cut the decking off. Replace the fascia and rake board. Then re roof the entire overhang using drip edge flashing and overhang the roofing by an inch.
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