Proposed flat roof warm deck build-up: request for comment

[bmj1]

1. Plywood deck

2. Sarnavap 500E

3. Insulation 150mm

4. Additional deck

5. Liquid waterproofing finish

 

Question: does it matter if the insulation is tissue facing or foil facing ?

[mjc55]

No comments on this question?

 

Anyone have any views re the tissue v foil faced insulation?

[Markuz]

Dont think it matters. Your choice. 

 

Personally I wouldn't do two decks, second one does nothing.