4.
Step 2 - Sectional reference details
Step 4 - Levels and falls
2.
Timber fillet*
Membrane*
Roof deck*
Firrings*
Insulation*
Plaster skim*
Plasterboard*
Doubled ceiling
joists*
Timber kerb
upstand*
Kerb upstand
insulation*
Vapour barrier*
2a. The example structure detailed in step 1 is shown below in 2D sectional view.
* All components detailed are supplied by others.
4a. Measure kerb across corners to check
dimensional accuracy.
4b. Ensure kerb top is in plane with the finished
walk-on surface.
Ventilation path (if required)