As I walked up to the house, I asked the builder where the gable truss ended up. He said that he only got one and it's on the other end of the building. Then I noticed the 4'x10" ridge blocks and sure enough that's what the plans call for.
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Never a code section.
- Thread starter ICE
- Start date
mtlogcabin
SAWHORSE
What is the purpose of the reflective material on the bottom of the sheating? I have never seen it before.
FredK
Gold Member
I say it's this: http://www.lpcorp.com/techshield/mtlogcabin said:
mtlogcabin
SAWHORSE
Thanks. definately not needed in my neck of the woods. What does it do to the life of the roof shingles?FredK said:
We see that on almost all the residential structures built in our area. It's a radiant barrier as Fred K posted.mtlogcabin said:
The temperatures in the attics are about 20 degrees cooler than the normal attic temps around here. You can even stand to go up in the attic of a home when it's over 100 degrees outside....150 + in the attic without the barrier!
Radiant barriers also keep heat in. No effect on shingles whatsoever.mtlogcabin said:
http://en.wikipedia.org/wiki/Radiant_barrier
steveray
SAWHORSE
In the second pic down, it looks like there is some light coming through, so it might have them, but probably not needed either.....503.2.1.1(1) says 7/16" can go 24" without edge support.....
Pcinspector1 said:
It is a headboard from a bed.Mule said:
The radiant barrier does make a remarkable difference in the temperature. There are other methods to achieve a radiant barrier but applied to the sheathing is the way to go. I have people that build a room addition with a radiant barrier and it is so much cooler that they then do the rest of the house. I also wonder about the shingles and only time will tell that story. When it first came out it was applied to plywood but now I only see it on OSB.
Something that gets missed a lot is the gable ends. They require radiant barrier just like the roof plane. Of course, in this case they forgot the gable end.
This was an engineer's crazyass sh!t.brudgers said:
steveray
SAWHORSE
If it matches the paper with the stamp....my butt is covered!.....Game on!ICE said:
That's true up to a point. Plan check engineers don't look at every piece of hardware or every stick of wood. Inspectors catch mistakes that both engineers missed. It may be per plan and still be entirely wrong. At least that has been my experience.steveray said:
The blocks are beveled. They are nailed in with a combination of nails through the trusses into the end of the block and toenails.Pcinspector1 said:
Paul Sweet
SAWHORSE
The ridge blocks might be to transfer shear at the diaphragm boundaries from one side of the roof to the other, although they are slightly oversized for this. Maybe they're just pressure blocking.