I have just put up my trusses. And I would like to know what size of roof sheathing to use. I’m putting on a concrete tile roof. Code says I can use 1/2 inch. But everyone tells me to use 5/8’s So the roof won’t sag. Will it, and should I use the 5/8’s. Thanks Hat
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talk with the truss maker. If designed properly to handle the roofing material and 5/8ths id use 5/8ths. A few years down the road when you try to sell the house, and the buys notices ripples on that 1/2 inch stuff it will be a downgrade. Sure you could use 1/2, but i dont think youll be happy in time. Are you considering OSB sheathing or plywood? If you use 1/2 OSB, my gut reaction is ripple city.
I will be using OSB. Hat
Is the tile going on purlins? What's the spacing on the trusses? Joe H
The truss company doesn't care what kind of plywood you use - No point asking them about that. The trusses need continuous bracing along the top chord, but almost any thickness of plywood can do that.
My concern with the trusses is whether or not they were designed for added loads of the concrete tiles.
As for the thickness of the playwood - Why not ask the tile manufacturer? The're the ones you'll be looking to for a warranty. See what they require, so you don't have any nasty surprises down the road.
What goes around usually gets dizzy and falls over.
They are 24 inch o.c. And they are rated for concrete tile. That is what I had them made for. I think that is a good idea to call the tile supplier. They would know. Thanks Hat
If you're using OSB and putting on concrete tiles, it might be worth jumping up to 3/4" sheathing. You didn't mention the layout of your trusses so I'm assuming the worst at 24" in which case 1/2" is totally out of the question. As other posters have said, you'll get ripple city. The difference in cost between 5/8" and 3/4" shouldn't be a deal killer and getting 3/4" OSB up on the roof won't be much different than 5/8" plywood.
Always remember that codes are MINIMUM standards and "doing it right" often means exceeding code if your objective is a good, solid building.
You might want to verify your structural requirements for supporting the concrete tile roof from the roofing manufacturer. I'm not sure exactly what you're dealing with, but I've framed ahead of a couple of traditional Spanish tile roofs and the roof loading is much higher than for other materials.