dad laid a tile floor, done it twice actually, problem is the house was
built to modern cost cutting methods in use 15 years ago, hence the floor is
large chipboard sheets that lock together by a tounge and groove,

below the floor sheeting is a layer of polystyrene, then the earth, no
joists or owt,

hence after a few years of people walking on the same path through the
kitchen, the polystyrene begins to compress and the floor sheeting moves.

dad didnt even know they used this method of floor construction, and when
mum asked for a nice tiled floor, he went out and bought the tiles, some
adhesive and grout for use on a wooden floor.

it lasted about 2 months before too many of the tiles had cracked, lifted
etc, that he took the lot up, drilled small holes in the most saggy bits of
the floor and injected expanding foam, this did lift the floor to something
kind of level,

he then used the most flexiable adeshive he could find, stuck new tiles
down, and grouted with the grout recomended by the tile shop of use on this
kind of situation,

the tiles are all still stuck in place a year later, but half the grout has
worked it's way loose, and it looks really naff.

he wants to know if there's some kind of grout that is more like a silicone
sealant type of consistency, he dosent mind if it's applied from a tube, as
he now has an air compressor and my old air sealant gun (can empty a
cartridge in 2 seconds flat if you forget to turn the compressor pressure
down )

i've heard of people grouting with a sealant, but dont think it'd be good
for a high traffic area, is there a grout type sealant that can be used?

"gazz" wrote in message
...
dad laid a tile floor, done it twice actually, problem is the house was
built to modern cost cutting methods in use 15 years ago, hence the floor
is large chipboard sheets that lock together by a tounge and groove,

below the floor sheeting is a layer of polystyrene, then the earth, no
joists or owt,

hence after a few years of people walking on the same path through the
kitchen, the polystyrene begins to compress and the floor sheeting moves.

dad didnt even know they used this method of floor construction, and when
mum asked for a nice tiled floor, he went out and bought the tiles, some
adhesive and grout for use on a wooden floor.

it lasted about 2 months before too many of the tiles had cracked, lifted
etc, that he took the lot up, drilled small holes in the most saggy bits
of the floor and injected expanding foam, this did lift the floor to
something kind of level,

he then used the most flexiable adeshive he could find, stuck new tiles
down, and grouted with the grout recomended by the tile shop of use on
this kind of situation,

the tiles are all still stuck in place a year later, but half the grout
has worked it's way loose, and it looks really naff.

he wants to know if there's some kind of grout that is more like a
silicone sealant type of consistency, he dosent mind if it's applied from
a tube, as he now has an air compressor and my old air sealant gun (can
empty a cartridge in 2 seconds flat if you forget to turn the compressor
pressure down )

i've heard of people grouting with a sealant, but dont think it'd be good
for a high traffic area, is there a grout type sealant that can be used?

It's called "Mastic"

HTH

;-)