Replies

1. 
   florida | Feb 18, 2020 05:15pm | #1

   No, not at all but have you looked at foam? Much faster and easier and will make your house stiffer. But, is there a reason you're insulating the roof instead of over the joists? Typically insulation goes on the ceiling.

2. 
   WISteve | Feb 18, 2020 05:39pm | #2

   no.

3. 
   nomorecoffee | Feb 19, 2020 07:02am | #3

   Thanks. Forgot to mention, roofers added 1/2" plywood over the original 1-by roof sheathing so it seemed to be adding up.

   I looked at foam but I want a vented roof and there's a lot of carpenter ants around here. The attic is finished, otherwise, yes, I'd be stuffing the joist rafters (and I am where I can). I have more detail in an energy/insulation/heating post, this question seemed a better fit for this category.

4. 
   oldhand | Feb 19, 2020 11:57am | #4

   I bet if you looked up the weights of your building materials you want to add and figure out the weight of a square foot of it combined it wouldn't be much.

5. 
   user-3976312 | Feb 27, 2020 11:23pm | #5

   If you plan to make it a finished ceiling after insulation you might want to consider the total weight and check it under dead load on a span table. Also consider snow load, depending on your climate. Insulating the roof will mean more snow building up.

1. 
   nomorecoffee | Mar 14, 2020 08:08pm | #6

   Had a question about using span tables and snow load but moving that into its own post under code.