I have installed 28 mm sparse in Stage 1 which we built last year and there is no deflection at cc 60 even though I have a 25 mm solid pine floor on top.
My option to lay down gv between the beams is gone since the material for the entire house was purchased last year.
In the bathroom, I laid gv in pipe holders on the floor chipboard and poured on top of it - it built up 7 cm compared to the floor outside.
My option to lay down gv between the beams is gone since the material for the entire house was purchased last year.
In the bathroom, I laid gv in pipe holders on the floor chipboard and poured on top of it - it built up 7 cm compared to the floor outside.
22mm chipboard flooring is rigid too 
There is that which is milled for the pipe... I would never consider doing extra framing above the floor joists...
I've extended a living room of about 40 m2 (4x10m) this summer with floor joists, plastic, 22mm chipboard flooring, paper, and parquet floor... I can stand and jump on it without the slightest give... and I weigh 110kg
There is that which is milled for the pipe... I would never consider doing extra framing above the floor joists...I've extended a living room of about 40 m2 (4x10m) this summer with floor joists, plastic, 22mm chipboard flooring, paper, and parquet floor... I can stand and jump on it without the slightest give... and I weigh 110kg