Couple of simple q's about counterbattens, battens and nails

[Waseem1]

Osb board, use goodgood quality felt counter batten and permavent strips

 

[^woody^]

You'll be counter battening that roof because you will need to extend the flat roof deck and cover down that shallow pitch.

I'm being a bit thick, but do you mean I should cover my side pitches with a sarking board (I have plenty of OSB3 T&G board 18mm on site), leaving a gap of about 5mm between each board and then counterbatten + batten on top of that? Or do you mean something else? Pitch is about 18 to 20, as per my post above.

If the roof pitch is below the recommended pitch for whatever tile you are using, then you need to board the rafters, fit bitumen felt with sealed laps and then counter batten and batten before tiling.

If the roof pitch is as recommended by the tile manufacturer, then you don't, and just felt/membrane and batten as normal.