Notes on roof terrace fastening
Reference to the current data sheet on the website (MUST BE REVISED! server-> data sheet roof terrace)
For what purpose is the roof terrace fastening recommended?
The roof terrace fastening was developed by KNUMOX GmbH specifically for use on roof terraces, flat roofs or garages, which make it possible to fasten KNUMOX elements without penetration.
Special product features of the roof terrace fastening
There is no penetration of the roof waterproofing, no thermal bridges and the transmission of structure-borne sound into the ceiling construction is excluded, minimized or even completely avoided.
The minimum load is specified on site and is as follows:
Through solid surface covering, concrete slabs, paving, wood (substrate or soil must not be taken into account in the calculation)
Fastening S 60: 90 kg/m²
Fastening M 60: 50 kg/m²
Fastening E 60: 110 kg/m²
Fastening S 100: 115 kg/m²
Fastening M 100: 72 kg/m²
Fastening E 100: 128 kg/m²
Installation only by specialist company!
The fastening system for roof terraces from KNUMOX GmbH is intended exclusively for installation by a specialist company. We strongly advise against having the installation carried out by a non-expert.
Basically, the existing statics of the roof terrace or garage must be checked.
The static loads on roof terraces/garages must be observed (permissible permanent/non-permanent loads). We recommend having the statics checked by a specialist. The statics have no connection with the fastening of KNUMOX, but refer exclusively to the load that rests on the roof at the designated point.
assembly instructions
If the assembly instructions or extracts shown here are not followed, the manufacturer, KNUMOX GmbH, assumes no liability or warranty.
project management
This fastening element should be discussed on site with all parties involved. If this fastening element is not optimal, custom-made products are possible and make sense.
From KNUMOX’s point of view, the following parties may be involved:
- Homeowner: approval of the construction project, assumption of costs, placing of order, etc.
- Tenant/restaurateur: Does the positioning of the KNUMOX elements make sense for the design, will they cover the costs, etc.
- Architect: general legal planning, positioning, statics of the flat roof (dynamic and static loads due to weight and wind), management and control of the craftsmen, etc.
- The executing trade is responsible for clarifying and carrying out the fastening work.
The following factors must be taken into account before planning or execution, checked independently and, if necessary, agreed upon before planning or execution in the event of discrepancies:
Check again from here:
- Clarification of the permissible permanent "load" / temporary load
- Use category of the flat roof area (private/public) and horizontal impact load
- Individual verification by structural engineers (may be required in the public sector, and in any case, if the use is as a fall protection measure, then also in the private sector or semi-public or commercial sector)
- Consideration of the wind zone (in relation to the load)
- selected surface (type) and installation height (weight) - e.g. gravel, greenery or floor slabs
- required height of the railing from the decking level (building regulations)
- freely available installation area for positioning the load supports
- Height of the building and geographical location (wind load zone & superposition)
- If the roof terrace fastening was not designed and calculated as fall protection, this can be done on a case-by-case basis upon request against a quote (planning and structural engineer costs).
- The roof terrace fastening must not be placed directly on the roof waterproofing and must be decoupled from it in coordination with the roofer using suitable material and must also fulfil an appropriate drainage function.
- The roof terrace fastening must be fully supported and must not only be supported at certain points. For this purpose, we can recommend drainage mortar tailored to the system.
- In any case, the roof terrace fastening must be decoupled and aligned vertically.
- The direct laying of coverings, as well as mineral or other leveling material, must be decoupled by a compatible PE or other material that is compatible with the roof waterproofing. The direct laying of covering material on the roof terrace fastening is expressly not recommended and will lead to the exclusion of the warranty, as it can lead to contact corrosion or mechanical damage to the system.
- Water must be able to drain from below, above and to the sides of the glass at all times.
- The "Flat Roof Guideline" or "Technical Rules for Waterproofing" was republished in the May 2019 edition. The predecessor was the December 2016 edition with the changes in November 2017. Flat roofs are roofs with a roof pitch ≤ 10°. The pitch range between 5° and 20° is referred to as a "flat-pitched roof". In accordance with the new flat roof guideline, the waterproofing of flat roof surfaces should have a minimum gradient of 2%, which should only be undercut in justified cases. Taking into account permissible flatness tolerances of the substructure or obstruction of water drainage due to overlapping of the sheets, a minimum gradient of 5% is recommended. The new DIN standard for roof waterproofing must first achieve the status, the justified presumption, that it is part of the recognized rules of technology. This generally applies to all successor standards to DIN 18195 (building waterproofing), namely DIN 18531, DIN 18532, DIN 18533, DIN 18534 and DIN 18535.
