On 2/20/2011 9:16 AM, cj wrote:
i would like to beef up the insulation on our sunroom ceiling and i
thought that a layer of rigid foam board with some half inch plywood and
shingles on top off that would do the trick as well as somewhat
soundproofing the room from rainstorms that can be deafening. the
ceiling(interior and exterior) is a thin gauge aluminum and i am not
sure how to attach the foam board/plywood to it. what type of fastener
would work best or combination of fastener and adhesive...i am thinking
of a fine thread type of sheetmetal screw might work.

What do you use your sunroom for? What kind of windows are in there?

A lot of people turn porches and sunrooms into additional living space
that can be used any time. But having a sun room that works for it's
intended purpose is a joy. Which is it?

I wouldn't add anything on top of what you have. Either rip it all down
and rebuild it as regular roof, or learn to love your metal roof and
possibly add insulation underneath with construction adhesive. Adding
insulation will do little for your noise considerations.

Jeff

thanks, cj