There is a small room that was added to my house but never finished
off. My plan is to finish it off as a sunroom.
The drawback is that the room (12x14 - 5/12 pitch roof) has trusses
that are designed with a flat ceiling and my wife would like it to be a
The span the trusses cover is 14'.
Would it be possible to sister 2x6/2x8 as rafters to the trusses and
create the cathedral?
I have no interest in tearing the existing roof down, the house is less
than 5 years old and needless to say, I don't want the additional
expense of a tearoff.
Not sure what you're really suggesting -- if you mean to remove the
trusses, the answer is certainly "no" w/o framing a whole system to
provide the roof and thrust support. If you mean to simply add a
cosmetic "rafter" and leave the truss to an open area to the existing
roof instead of putting the ceiling on the underside of the existing
trusses, don't see why not (although I can't imagine it would be
The horizontal parts stop the roof pushing the wall out. Best leave them
You could still have the open ceiling. pain the trusses a light colour as
the cathedral ceiling. Can look quite nice - sort of colonial.
the size of the lumber used in a truss is not up to spec
with a conventional stick framed roof system
if you cut into and modify the truss you take away
ALL the strength of the system so you cant just modify it
and the metal staple straps that make the connections
are put on with a press so even if you could get a couple
you cant just hammer them on :o)
and usualy the truss wont line up the same way on the top plate of the walls
as a conventional roof so you wont have room to sister on those rafters
just tare it out and get new trusses
it will save you a lot of headaches and time
you are talking a day vs maybe 3 or more dealing with that mess
Should be no problem . Get an engineer to design it for you.
I have done several jobs like your suggesting and am planning another just
Check you attic area for ducts and wiring that will all have to be moved,
this can add considerable expense and planning
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