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IKO Slope calculation

All fields marked with an asterisk must be completed.

A project may comprise various roofs. If the thermal requirements for these roof surfaces differ, you must complete a separate form for each roof surface individually.

Each calculation is a proposal and must be checked by the customer before ordering and before execution.

In order to be able to make the requested calculations for you, we need the details below. Please fill out the below form as completely as possible. This will enable us to help you with the calculation quickly and efficiently!

If you would like support in completing this calculation form or if you want specific advice on this calculation, please contact your IKO advisor.

"*" indicates required fields



In the event of adjustment of the existing calculation, please state the IKO reference number.
Provide at least one of the parameters listed below to enable us to make the calculation. If you do not know the type of slope, please choose 1/80 by default.
ALU TAP (1200 x 1200 mm) Minimum starting thickness Slope (%) Slope (cm)
1/120 30 mm 0,83 % 1 cm / plate
1/80 30 mm 1,25 % 1,5 cm / plate
1/60 40 mm 1,67 % 2 cm / plate
1/50 20 mm 2,08 % 2,5 cm / plate
1/40 60 mm 2,50 % 3 cm / 2 plates *

* concerns 2 stacked 1/80 plates with a slope of 1,25%

Drop files here or
Accepted file types: jpg, png, pdf, Max. file size: 10 MB.
    Ensure that the plan meets the following requirements:
    – visible outer dimensions on the plan
    – visible location of water discharges on the plan
    – indication of direction of slope
    View here an example of a correct plan.
    This field is for validation purposes and should be left unchanged.