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When being used on courtyard areas or garage drives subsequently to be driven on by cars, the grass cross spacers must additionally be stabilised using water-permeable single grain mortar (at least 10 mm deep), e.g. from Schomburg or PCI Pavifix. The company carrying out the work must check whether the sub-surface and the structure of the paving are suitable for vehicular use. After the setts are laid, the area should be compacted before the joints are filled in, as otherwise the cross spacers will get pushed back up and become visible.

See table > PDF download

Several factors could be the reason for this problem:

• The slabs were laid too loosely (too much play)
• At the perimeters and/or outer edges the gap between slabs and wall is too big
• Cross-spacers were not fitted exactly
• There is no outer edge (no abutting edge)

When being used on courtyard areas or garage drives subsequently to be driven on by cars, the grass cross-spacers must additionally be stabilised using water-permeable single grain mortar (at least 10mm deep), e.g. from Schomburg or PCI Pavifix. The company carrying out the work must check whether the sub-surface and the structure of the paving are suitable for vehicular use. After the setts are laid, the area should be compacted before the joints are filled in, as otherwise the cross spacers will get pushed back up and become visible.

The height compensation depends on the size of slab being used.

With a slab size of 60 x 60 cm the maximum possible compensation is 1.25 cm / 1.25% per metre. 
In combination with a MULTI it is 2.5 cm / 2.5% p.m.

With a slab size of 50 x 50 cm the maximum possible compensation is 1.50 cm / 1.50 % per metre. 
In combination with a MULTI it is 3.00 cm / 3.0 % p.m.

With a slab size of 40 x 40 cm the maximum possible compensation is 1.875 cm / 1.875 % per metre. 
In combination with a MULTI it is 3.75 cm / 3.75 % p.m.

A form of stable edge fixing is absolutely imperative. 

Please observe in this regard the various industry specifications, such as the roofing trade regulations and flat roof guidelines, as well as DIN 18195 Parts 5 + 9 and consult the specialist firm carrying out the work. 

Please contact your paving slab manufacturer to make sure that they can be laid on pads and keep to the manufacturer's recommendations.

With the VARIO, VARIO MINI, MULTI and MULTI+PLUS it is possible to achieve some minor footfall sound insulation by laying a MAXI shim on top of the pad. 

As the cross-spacers with reverse motion locking (prod. no. 192145 4mm, prod. no. 192152: 6 mm) have a joint bar height of only 15 mm, ceramic slabs and porcelain stoneware tiles with a height of 18-20mm can also be laid on them with no problem.

(Please contact your paving slab manufacturer to make sure that they can be laid on pads and keep to the manufacturer's recommendations.)

Please follow our laying instructions for STANDARD or MAXI

Please follow our laying instructions

Please follow our laying instructions

Please follow our laying instructions

Please follow our laying instructions

Please follow our laying instructions

All (splittable and stackable) MAXI pads can be stacked in any combination up to six-high on top of each other. 
When stacking half pads please have regard to the compressive strength of the sub-construction . 

Possible reasons:

• There is no adequate form of edge fixing
• The slabs were not laid starting from a corner
• The slabs were not laid closely enough to each other

5-point laying means that the paving slabs lie on pads at 5 points. Generally, a quarter of a pad is always fitted at each corner and in the middle of the paving slab a further whole pad with no joint bar is laid underneath it. This method is recommended for any slab with one side longer than 60 cm . 

The easiest way to work out the quantity you need is by using our requirements calculator . 

All (splittable and stackable) MULTI pads can be stacked in any combination up to seven-high on top of each other. In order to compensate for a slope, it is also possible here to fit the VARIO (prod. no. 192169) or VARIO MINI (prod. no. 193166) with cross-spacer for reverse motion locking (prod. no. 192145 4mm or prod. no. 192152 6mm). In this case the maximum number is 6x MULTI or MULTI+PLUS and 1 VARIO or VARIO MINI. 

When stacking half pads please have regard to the compressive strength of the sub-construction .