Bonding agent for fibre cement tiles

[Nicky239]

I am about to use concrete tiles to form ridges and hips on a fibre cement tiled roof.I need to use a suitable bonding agent before bedding them with mortar but not sure if this is PVA or what, can anyone help me?

 

[Alastairreid]

Have you considered the dry ridge system.

http://www.marleyeternit.co.uk/Roofing/Slates/Rivendale-Fibre-Cement-Slate.aspx

 

[Nicky239]

Unfortunately I have bought everything already except the bonding agent

 

[xfr]

PVA not really needed just DON'T use only yellow sand in the mortar mix
it will drop out of the bed in time.i like a 3x1 mix!! 1 cement 1 yellow building sand 2 brown building sand which will give it strength and feb mix not squezzee liquid...