Overtec Attika Roof Border - Concreted

The overtec cast-in parapet can be installed on a variety of substrates, including concrete walls, brickwork, sand-lime brickwork, ceiling formwork and precast walls. Installation time can vary depending on the precision of the substrate. For example, ceiling formwork offers a high level of accuracy, which can reduce installation time, while casting on brickwork requires additional work steps due to the porosity and structure of the material.

When setting the parapet on brickwork, care must be taken to seal the pores of the brick to prevent concrete from entering the voids. Only after sealing can the parapet be placed on the brickwork. A higher level of accuracy can be expected with glued bricks as they provide a firmer and smoother surface than bricks laid in a mortar bed. A perimeter adhesive is supplied as standard and it is recommended that every third to fourth element is supported to ensure a stable attachment.

Sand-lime brick is a precise and stable base that is well suited to the installation of a concrete-set parapet. The fastening can be done using perimeter adhesive or 90x90 angles and brick dowels that can withstand the high compressive forces of the concrete. A major advantage of sand-lime brick installation compared to brick walls is that the brick chambers do not have to be closed. The parapet can be additionally supported by wooden beams or fall protection to ensure stability.

Slab formwork offers the most precise and simplest base for a concreted parapet. The outer edge of the parapet is marked on the formwork, usually using a chalk line. A pin is then attached along the line, which forms a boundary for the inside of the structure. The parapet is set up along the inside of the pin and connected to a 90x90 angle, which ensures stable anchoring in the base area. Additional support and alignment with a spirit level ensure exact positioning.

For a secure installation of the parapet on a cast-in-place concrete wall, a flat surface must be created. A recommended method is to attach a 3-4 cm thick wooden edger to the lower edge of the formwork. After the concrete has hardened, this wooden edger leaves a pressure edge on which the parapet can be placed exactly. It is important that the parapet is installed before the ceiling reinforcement is put in place to make it easier to insert the parapet. For additional fixation, the 90x90 angles are screwed to the parapet plate and then secured with

No, a concreted-in parapet is not suitable for the area of ​​an ISO cage, as this acts as a thermal break and reduces heat transfer between the inside and outside areas. A concreted-in parapet, on the other hand, acts as a ceiling edge formwork that holds back concrete in the area of ​​the parapet joint. To ensure thermal separation, a screwed-on version of the parapet is therefore recommended, which minimizes thermal bridges and meets the requirements of an ISO cage.