Raising The Pitch of the Roof

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Posted by: from Toronto
11/26/2019 at 5:01:49 PM

Hi, I wanted to know if there is any way to raise the pitch of the roof without incurring extensive damage interior wise? Is there such a thing as building a new roof over existing roof and not ripping anything out?

I was quoted $250 k to have this done but this includes almost full interior renovation as everything will be damaged from building a new roof. My goal is to raise the pitch of the roof (currently it's almost flat) to more of a typical roof height for better curb appeal.

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Date/Time11/27/2019 at 9:36:52 AM

Yes most definitely you can build a roof over your existing low-slope roof. You will have to remove small portions of the roof as you reframe roof rafters as well as cut holes in the existing roof for ventilation. I recommend you contacting a draftsman or architect in your local area.

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Date/Time11/27/2019 at 10:03:15 AM

Yes there are several way to change the pitch of the roof without ripping the whole roof apart and exposing the interior to the elements.

Without knowing the layout and the manor of the existing dwelling, I would suggest talking to a structural engineering to attain the basic drawings required for the modification.

We have usually used the exterior walls to support the basic build to elevate the ridge beam for a conventional 4/12 pitch from either a flat roof or a low slope 1/12.

Once the ridge beam has support, you can reframe a new attic space where the old roof was.

Hopefully that is helpful



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Date/Time11/27/2019 at 3:19:52 PM

There will be some demo required where the new roof system connects to the walls. If you only have one estimate so far best to get at least three. If all recommend removing the existing flat roof it's likely for good reason.

As long as the framing methods comply with Part 9 of the Building Code engineer or architect is not required. Roofs can be designed using the span tables in the Code (for dimension lumber) or by a truss supplier using engineered software. It's possible that scissor trusses would be one option in which case no ridge beam.

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Date/Time11/28/2019 at 11:16:49 AM

Yes this can be done without extensive interior renovations. Tbh i don't see the need for any interior work required. Tear off the old roof frame the new peak roof then sheath and lay shingle. If you would like i can come take a look at this and give you a reasonable quote for this work.

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