Placing fiberglass wool over styrophoam?

[kosciap]

We have just stripped down the attic in our new house and found the styrophoam plates on the roof. We want to insulate the attic properly now and wondering if we could keep the styrophoam and place the fibreglass wool on top of it? Or is it not such a gtreat idea?

The first option is to place the wool horizontaly under the wooden structure you can see on the picture.
The second option is to nail some new wooden boards on top of isomo and place wool vertically between them.
Any of those two make any sense?

Untitled

• kosciap
• 5 Nov 2011
• 1

Also one of the smaller beams needs to be replaced. Do you think it is doable by newbies (like me) or should this be done by a professional?

Untitled

• kosciap
• 5 Nov 2011
• 1

Thanks in advance.

 

[JohnD]

how thick is the foam?

do you mean a vertical strut? what are its dimensions, how is it fixed, why does it need to be replaced?

 

[datarebal]

remove whats there, then tri iso it under the rafters.. much nicer