Posted: Mon Mar 07, 2016 2:48 pm
trying to find suitable aggregates for my permeable driveway but I think terminology is clouding the issue.
From the pages on the Paving Expert site, it seems I need 5-20 or 4-40mm Type 3 (DTp3) for the sub-base and 2-6mm grit for both the bedding layer and jointing fill.
been calling round a few builders yards and they clearly are not familiar with this, especially the concept of permeable driveways.
One guy told me he had Type 1 which he said is the same as Type 3. Clearly it's not.
And as far as the grit goes the closest thing I can find to the correct size is Horticultural Grit. Obviously being horticultural obviously it's expensive. About £100 / bulk bag. I've always found that garden centres charge twice as much for the same thing that builders yards supply, but it's under a different name.
So what I'm asking for is some help on indentifying the correct name for the stuff so I can do a good internet search and some names of builders merchants near SE London who supply the above.
Many thanks
From the pages on the Paving Expert site, it seems I need 5-20 or 4-40mm Type 3 (DTp3) for the sub-base and 2-6mm grit for both the bedding layer and jointing fill.
been calling round a few builders yards and they clearly are not familiar with this, especially the concept of permeable driveways.
One guy told me he had Type 1 which he said is the same as Type 3. Clearly it's not.
And as far as the grit goes the closest thing I can find to the correct size is Horticultural Grit. Obviously being horticultural obviously it's expensive. About £100 / bulk bag. I've always found that garden centres charge twice as much for the same thing that builders yards supply, but it's under a different name.
So what I'm asking for is some help on indentifying the correct name for the stuff so I can do a good internet search and some names of builders merchants near SE London who supply the above.
Many thanks
