I am installing an r-panel metal roof on a single story 1200 sq. ft house with a 5/12 pitch. I have removed all the old cedar shake. I want to put down a radiant barrier. I have storm guard for the eves, hips, valleys, etc. and deck armor for the field. From what I gather is
- I can put down the radiant barrier directly over the underlayment (already purchased)
- install fir strips/battens ( what size needed here- 1x1, 1x3, 1x4, 2x4)
- install them horizontally
- some people say I have to do cross battens as well as running vertically. In this case, the radiant barrier would be suspended between the two battens, which seems like overkill to me but willing to do what is necessary. Also, I am afraid that doing this would raise the roof to high then I would have to fuss with the existing gutters with a piece of angle that didn’t come with the roof trim.
- I also have insulation and Therma block available to me. A friend that that does commercial steel erecting says I can help myself to whatever I need.
- I believe that I need a way for the hot air to travel upwards since the r-panel has 1.25 inch and a 3/16 raise in it, isn’t that good enough?
- what about using inside enclosers? Is that correct?
- currently the house has vents under the eaves inline with the wall,(sorry I don’t know what these are called) gable and roof vents but not ridge vent. Should I be installing ridge vent? If so, how to with the metal roof?
- If the radiant barrier isn’t necessary please say so. I could always install it underneath, hang from the rafters, inside the attic if that will relieve a bunch of headaches.
Thank you in advance for helping me out, MJ
PS- If you are willing to address any one of these questions please do. You don’t need to answer everything