How do I secure the extra height boards to the existing loft floor joists prior to boarding out ??

[Mutley56]

I read from a previous post by Prentice boy of Derry that extra timbers should be placed across the existing loft joists before boarding over to allow for the full depth of insulation to remain. How do I secure these extra boards (presumably on their edges) to the existing joists.
Thank in advance.
Mutley56

 

[Tigercubrider]

What I did in mine was add 2x1 to the edge and screw it to the joist

 

[Mutley56]

Did you not place the new pieces of wood across the existing joists? Did you use brackets or plates to screw the two together?
Thanks.
Mutley56

 

[Tigercubrider]

I basically used strips of ply with 2x1 screwed to each long edge
Then diagonally screwed the ply to the joists
Once the flooring is screwed to the top 2x1 it forms a box

 

[Mutley56]

Thank you very much. This is a project I'm undertaking when it cools down a bit in the loft.

Mutley56