Garage ceiling

Posted by hr(bob) hofmann@att.net on October 19, 2009, 3:54 pm

> > I have trusses on four foot centers. I plan on installinf between the
> > trusses 2x4 material every 4 feet so I can hang drywall or some other
> > board for a ceiling. My idea is to install these boards flat rather
> > than on edge so I can use r-30 insulation which is 30 inches wide.
> > Also, there are some places where I have wire that is in the way if I
> > put the boards on edge. I plan to nail or screw each end of these
> > boards between the bottom chord of the trusses.
> > I know the edge of the board is stronger than when layed flat. WIll I
> > have trouble with sagging? SHould I also space every 2 feet or will 4
> > be enough?

> 2x4s will sag with the weight of the dry wall if used that way. =A0You
> need to use them edgewise. =A0Others who have mentioned that trusses are
> not always engineered to support a load from the bottom are correct.
> You might be able to build a short cripple wall and attach it between
> the trusses at 90 deg. =A0At least that way you'd be able to nail to the
> top of the truss as well as the bottom. =A0Don't know if 5/8 wall boad
> would sag inside a 4'x4' opening.
> What is above the trusses? =A0That's quite a spacing. =A0You don't have a
> floor system above them do you?

I put 1' x 4' 2" thick styrofoam panels in aluminum suspended ceiling
channels, and got insulation and a white ceiling in one swoop. I did
have to vent the space above the panels with a vent in the gable end
of the garage ceiling area. It works great. With insulation in the
walls, the garage stays above freezing in outdoor temps down to zero.

Posted by aemeijers on October 19, 2009, 6:26 pm

hr(bob) hofmann@att.net wrote:

>>> I have trusses on four foot centers. I plan on installinf between the
>>> trusses 2x4 material every 4 feet so I can hang drywall or some other
>>> board for a ceiling. My idea is to install these boards flat rather
>>> than on edge so I can use r-30 insulation which is 30 inches wide.
>>> Also, there are some places where I have wire that is in the way if I
>>> put the boards on edge. I plan to nail or screw each end of these
>>> boards between the bottom chord of the trusses.
>>> I know the edge of the board is stronger than when layed flat. WIll I
>>> have trouble with sagging? SHould I also space every 2 feet or will 4
>>> be enough?

>> 2x4s will sag with the weight of the dry wall if used that way. You
>> need to use them edgewise. Others who have mentioned that trusses are
>> not always engineered to support a load from the bottom are correct.
>> You might be able to build a short cripple wall and attach it between
>> the trusses at 90 deg. At least that way you'd be able to nail to the
>> top of the truss as well as the bottom. Don't know if 5/8 wall boad
>> would sag inside a 4'x4' opening.
>> What is above the trusses? That's quite a spacing. You don't have a
>> floor system above them do you?

>
> I put 1' x 4' 2" thick styrofoam panels in aluminum suspended ceiling
> channels, and got insulation and a white ceiling in one swoop. I did
> have to vent the space above the panels with a vent in the gable end
> of the garage ceiling area. It works great. With insulation in the
> walls, the garage stays above freezing in outdoor temps down to zero.

Hope you never get a fire in there....

--
aem sends...

Posted by hr(bob) hofmann@att.net on October 19, 2009, 8:43 pm

> hr(bob) hofm...@att.net wrote:

> >>> I have trusses on four foot centers. I plan on installinf between the
> >>> trusses 2x4 material every 4 feet so I can hang drywall or some other
> >>> board for a ceiling. My idea is to install these boards flat rather
> >>> than on edge so I can use r-30 insulation which is 30 inches wide.
> >>> Also, there are some places where I have wire that is in the way if I
> >>> put the boards on edge. I plan to nail or screw each end of these
> >>> boards between the bottom chord of the trusses.
> >>> I know the edge of the board is stronger than when layed flat. WIll I
> >>> have trouble with sagging? SHould I also space every 2 feet or will 4
> >>> be enough?
> >> 2x4s will sag with the weight of the dry wall if used that way. =A0You
> >> need to use them edgewise. =A0Others who have mentioned that trusses a=

> >> not always engineered to support a load from the bottom are correct.
> >> You might be able to build a short cripple wall and attach it between
> >> the trusses at 90 deg. =A0At least that way you'd be able to nail to t=

> >> top of the truss as well as the bottom. =A0Don't know if 5/8 wall boad
> >> would sag inside a 4'x4' opening.
> >> What is above the trusses? =A0That's quite a spacing. =A0You don't hav=

e a

> >> floor system above them do you?

> > I put 1' x 4' =A02" thick styrofoam panels in aluminum suspended ceilin=

> > channels, and got insulation and a white ceiling in one swoop. =A0I did
> > have to vent the space above the panels with a vent in the gable end
> > of the garage ceiling area. =A0It works great. =A0With insulation in th=

> > walls, the garage stays above freezing in outdoor temps down to zero.

> Hope you never get a fire in there....
> --
> aem sends...- Hide quoted text -
> - Show quoted text -

There so much else flammable in the garage that by the time it gets
to the ceiling it is already a disaster. This garage is alongside the
house.

Posted by benick on October 19, 2009, 9:16 pm

> 2x4s will sag with the weight of the dry wall if used that way. You
> need to use them edgewise. Others who have mentioned that trusses are
> not always engineered to support a load from the bottom are correct.
> You might be able to build a short cripple wall and attach it between
> the trusses at 90 deg. At least that way you'd be able to nail to the
> top of the truss as well as the bottom. Don't know if 5/8 wall boad
> would sag inside a 4'x4' opening.
> What is above the trusses? That's quite a spacing. You don't have a
> floor system above them do you?

Posted by Tony on October 20, 2009, 12:58 pm

stryped wrote:

> I have trusses on four foot centers. I plan on installinf between the
> trusses 2x4 material every 4 feet so I can hang drywall or some other
> board for a ceiling. My idea is to install these boards flat rather
> than on edge so I can use r-30 insulation which is 30 inches wide.
> Also, there are some places where I have wire that is in the way if I
> put the boards on edge. I plan to nail or screw each end of these
> boards between the bottom chord of the trusses.
>
> I know the edge of the board is stronger than when layed flat. WIll I
> have trouble with sagging? SHould I also space every 2 feet or will 4
> be enough?

Yes but use 5/8' drywall, first across the joists, then a second layer
with the joists. Get lots of hooks so you can hang lots of stuff up
there. The heavier the better. What you have are super trusses! The
more weight on them the stronger they get! You can even throw a chain
up there so you can pull your car engine yourself. Also on the outside,
cover your shingles with 3 more layers of shingles. 1 layer isn't
enough to hold the drywall. 3 layers of shingles will give it more
strength. Take these instructions to your architect to be verified first.

Is that the answer you are waiting for? Well you got it!

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Garage ceiling - Page 2