Hi
We put down a new patio last autumn with indian sandstone paving slabs (600 X 600 sawn edge). The supplier recommended using a sandy type grout that you brush into the joints and wet with a hose. The problem is that now when I try to powerwash the patio all this sandy grout keeps getting washed out of the joints. As the stone is black it needs to be powerwashed regularly.
Does anyone know of a normal type grout that can be used outdoors with this type of stone and will withstand powerwashing? Is there any issue of needing expansion joints etc (patio 30m2)?
Thanks,
Liamm
We put down a new patio last autumn with indian sandstone paving slabs (600 X 600 sawn edge). The supplier recommended using a sandy type grout that you brush into the joints and wet with a hose. The problem is that now when I try to powerwash the patio all this sandy grout keeps getting washed out of the joints. As the stone is black it needs to be powerwashed regularly.
Does anyone know of a normal type grout that can be used outdoors with this type of stone and will withstand powerwashing? Is there any issue of needing expansion joints etc (patio 30m2)?
Thanks,
Liamm