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Old 02-16-2013, 08:29 AM   #1
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I want to build vaulted ceiling but my rafters r 2 by 6 n I want to make them 2 by 8 or deeper. Could I add 2 by 4 using cleats n make rafters 2 by 10 so I can easily add lights n insulation before drywall. Or will that move n crack or not hold up at all. Or should I just add new 2 by 10 next to old rafters

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Old 02-16-2013, 08:39 AM   #2
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Go back and add your location to your profile, yes it makes a big differance on questions like this.
Vaulted ceilings look cool but add a lot of issues.
Trying to get the proper amount of insulation up there can be a big problum.
All the heat is going to be going up so the rooms feel colder.
Going to have to redesign the way the roof is kept from spreading.
http://www.energystar.gov/index.cfm?...sulation_table

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Old 02-16-2013, 09:49 AM   #3
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Old 02-16-2013, 10:00 AM   #4
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Quote:
Originally Posted by joecaption
Go back and add your location to your profile, yes it makes a big differance on questions like this.
Vaulted ceilings look cool but add a lot of issues.
Trying to get the proper amount of insulation up there can be a big problum.
All the heat is going to be going up so the rooms feel colder.
Going to have to redesign the way the roof is kept from spreading.
http://www.energystar.gov/index.cfm?...sulation_table
That's y I want to make rafters deeper so I can add insulation
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Old 02-16-2013, 10:05 AM   #5
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Someone told me to add 2 by 4 n make it into a 2 by 10 n add insulation n lights but I think that will eventually move in future causing cracks. That's y I was thinking if I butted 2 by 10 next to rafters it will give me enough room for insulation n my light cans.
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Old 02-16-2013, 10:09 AM   #6
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No one needs to know exacty what steet you live on, looking for at least the state so the guys can figure things like snow loads, venting, amount of insulation needed.
Unless you plan on using foam for insulation or going over the roof on the outside with SIP panels you have to also allow room for foam baffles from the soffits to the ridge for air flow.
Got some pictures of the attic area?
If you look at the top right hand side of the page where it says Welcome and tap that you can edit your location.
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Old 02-16-2013, 10:10 AM   #7
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Originally Posted by ecocco1469

That's y I want to make rafters deeper so I can add insulation
It calls for r30 but that's 9 1/2 inch insulation which won't fit in 2 by 6. N also the slanted recessed light cans r about 7 inches deep that I want to use.
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Old 02-16-2013, 10:19 AM   #8
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There are factors to consider when changing from a flat ceiling with attic space above to a vaulted ceiling. The existing ceiling joists assist to keep the exterior walls from spreading. Your design needs to take this into consideration in addition to adding adequate insulation, and ventilation. If you sister the rafters you will want to consider a thermal break between them. You may also want to consider framing in false rafters, basically a set of rafters that sit on the top wall plates as your current rafters do but go up to a new ridge that is beneath the existing ridge. The advantage is less movement on your new rafters and drywall when snow and wind loads are imposed on the roof. In your area a building permit is required for structural work, you may want to go by the Building Dept. and talk it over with a plans examiner or an Inspector. If you can post some photos and dimensions you will likely receive some specific suggestions.
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Old 02-16-2013, 11:35 AM   #9
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Good idea about the new ridge. I def will sit them on the wall plate at bottom as if installing new rafters n by building new ridge it will still give me vaulted look but also plenty of room for insulation n room for my lights
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Old 02-18-2013, 11:08 AM   #10
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are u taking out ceiling joists ( flat ceiling) and opening the room up to a vaulted ceiling or do you already have a vaulted ceiling that needs upgraded??

Last edited by hand drive; 02-18-2013 at 12:27 PM.
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Old 02-26-2013, 06:21 PM   #11
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Yes I want to make dining room match the kitchen. Wich is already a vaulted
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Old 02-26-2013, 10:01 PM   #12
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Quote:
Originally Posted by ecocco1469 View Post
Yes I want to make dining room match the kitchen. Wich is already a vaulted
Thecamper gave the answer. if its a standard A frame roof the joists most likely hold the roof up by keeping the exterior walls from pushing outward unless you have a shed type roof above the ceiling joists.
what details are up in the attic above the room you want to alter?

edit to add... have you already taken the flat ceiling joists out?
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Old 02-27-2013, 10:59 AM   #13
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My kitchen was vaulted when I bought house now I wanted to knock wall down between kit n dining room n vault the dining room also to match kit. The rafters in attic sit on outside wall n the joist r still up n also sit on wall. U saying if I remove ceiling joist that my wall will expand out if so then y hasn't that happened to kitchen wall I'm trying to put pics up but I can't figure how to do it from the DIY phone app. Maybe I need to b on computer to show pics?
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Old 02-27-2013, 10:59 AM   #14
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I don't know what a shed type roof is I have a one story ranch
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Old 02-27-2013, 11:48 AM   #15
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Quote:
Originally Posted by ecocco1469 View Post
I don't know what a shed type roof is I have a one story ranch
A shed roof is pitched in one direction only as opposed to a gable roof which is pitched in two directions.

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