You ask, we answer

We answer the most frequently asked questions in our FAQs. If you have any other questions, please do not hesitate to contact us. We'll gladly give you advice and information.

  • What sort of insulating slabs are suitable for laying using pads?

    See table > PDF download

  • Why do the cross-spacers for reverse motion locking come back up out of the joints?

    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)

  • Can areas that have been laid using grass cross-spacers / T-shape grass spacers be driven over?

    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.

  • What is the pads' load-bearing capacity?

    MAXI

    50.0 kN per quarter segment × 4 = 200.00 kN per pad (tested at 23°C and 50% relative air humidity)

    MULTI WITHMULTI+PLUS     

    50.0 kN per quarter segment × 4 = 200.00 kN per pad (tested at 23°C and 50% relative air humidity)

    STANDARD   

    50.0 kN per quarter segment × 4 = 200.00 kN per pad (tested at 23°C and 50% relative air humidity)

    VARIO / VARIO MINI

    at cogwheel height of 35 mm = 19.2 kN per cogwheel × 4 = 78.80 kN per pad
    at cogwheel height of 50 mm = 13.6 kN per cogwheel × 4 = 54.40 kN per pad
    (Tested at 23°C and 50% relative air humidity)

  • What fire protection class do the pads and cross-spacers fall into?

    Flammability classification as per UL 94 = HB (equivalent to B2) 

  • How much of a slope can be compensated for over a length of one metre using the height-adjustable VARIO?

    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.

  • Is any form of edge fixing required and, if so, what should it look like?

    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. 

  • The paving slab breaks when laid on pads.

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

  • How can footfall sound insulation be achieved?

    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.