I had a new block paving driveway installed several years ago. I considered
a patterned concrete drive - but just don't like the look of them too much.
The big disadvantage of block paving is, of course, weeds and moss growing
in the joints. It's also a pain cleaning the drive with a pressure washer
because it blasts all the sand out of the joints.
My neighbour, who has a block paving driveway also tried using one of these
resing coatings that you put on the driveway with a roller. Supposed to seal
the blocks *and* the joints to prevent weed growth - but it hasn't worked
and he still has the same problem as me.
Is there no type of setting 'grout' that can be used with block paving to
fill the joints with a solid material that will not permit the growth of
weeds and moss?
Rake out the joints and clean the site of all debris.
Wait for a nice dry sunny day. Mix/buy mortar mix and scatter over the
paving and then brush over with a soft broom working it into the
Either spray with a hose on mist setting or leave for it to rain.
Here is an idea that I came up with for filling the gaps in patio slabs,
but not suitable in this case as the gap would be too small, I never
tried it but it might work well. Fill the gaps about 2/3rds full with a
silicone sealant, then before the sealant sets, brush in sand of the
required colour, when the sealant sets the sand would then be set in the
sealant, and the joint should, in theory, stay flexible and weed free,
but would it work practically?
One of the main problems with block paving, of course, is that unlike patio
slabs, the blocks are small and the gaps far more numerous. It would take
forever to manually 'grout' every gap surrounding every block on my
The idea of brushing in a weak cement mix and then 'watering it', as
suggested above, did occur to me - but the blocks are rough surfaced and I'm
concerned that they would be covered in cement stains after attempting such
a 'cure' for the weeds.
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