17-08-12, 06:56 AM
Phil
Its no problem using a 40mm bed ( or dab) if its left to dry before you try to use the steps.Dabbing slabs onto a concrete base is an acceptable way to lay slabs.Its also far quicker than a solid bed method.I used to lay York Stone for a living 20 odd yrs ago, and the variance of that stuff means your mortar dabs varied alot too.Just dont skimp on using enuff compo where you need it ! I often build sets of steps,and where possible I like to cast concrete bases to dab slabs etc onto.
In bricklaying a 10mm ( compressed) bed is the standard for various reasons- aetsthetics/ strength/ speed of laying/ standardisation of build etc.But its not essential.Old imperials ( 73 - 80mm bricks) often had up to 15 mm beds.Stone has much thicker joints too..
Its no problem using a 40mm bed ( or dab) if its left to dry before you try to use the steps.Dabbing slabs onto a concrete base is an acceptable way to lay slabs.Its also far quicker than a solid bed method.I used to lay York Stone for a living 20 odd yrs ago, and the variance of that stuff means your mortar dabs varied alot too.Just dont skimp on using enuff compo where you need it ! I often build sets of steps,and where possible I like to cast concrete bases to dab slabs etc onto.
In bricklaying a 10mm ( compressed) bed is the standard for various reasons- aetsthetics/ strength/ speed of laying/ standardisation of build etc.But its not essential.Old imperials ( 73 - 80mm bricks) often had up to 15 mm beds.Stone has much thicker joints too..