Hello All,
I’m one of the woodworkers from over in the knots forum, I haven’t posted here before but have enjoyed reading over some great tips and info that I’ve seen posted here.
I have lived and worked in Mexico for the past ten years and I’m building a small addition onto my woodshop. I want to insulate the outside surface of my plywood covered roof with polistyrene foam and I’ve seen some examples of this at material distributors in the nearby city but have never seen this up close to see how it’s done.
The information that I’ve read over suggested all the layers as follows 1) plywood roof base 2) heated tar to “glue” the polistyrene down 3) 2″ thick polistyrene covering 3) elastomeric roof coating to stick membrane to foam 4) membrane 5) several more layers of elastomeric roof coat.
I have also seen more than 1 layer of membrane used and some examples have shown tar paper and more tar on the top.
I’m not sure on these techniques and I’m at the stage now where I can go one way or the other and would like some tips from the experts.
Thanks in advance for any advice.
Brian
Replies
Are you STILL in Mexico? What elev. are you at? Can you get rubber roof? What are you calling for a slope?
Sorry for all the questions but, any help on your part will yield the greatest results answerwise.
" Mi casa, caliente casa" at 500' above sea level, 38 degrees N lat.
Spheramid Enterprises Architectural Woodworks
And you thought you could ignore balloon knot.
Spheramid,
Yes I still live in Mexico, on the pacific coast about 40 miles north of Cabo San Lucas, Southern Baja California. My elevation in maybe 500 feet above sea level, my home / shop is about 2 miles as the crow flies from the beach (I do have a great ocean view though). I'm not familiar with rubber roof, I'll google it and see what it is. The slope of the roof drops about 3' over a 22 foot run. The roof has 2 slopes one on either side and the structure of the building is a welded steel structure that I will later fill in with curtain walls made of galvanized steel studs and sheathing. I've built it this way because it is a second story structure that needs to be both light and very strong due to the hurricanes that periodically hit this area.
Any help is much appreciated.
Brian