The overtec Attica

The overtec parapet is not suitable for attaching a railing directly to it. It is primarily designed to withstand loads such as wind, earthquakes and snow. A railing, on the other hand, must be able to bear beam loads and ensure the safety of people. It is therefore necessary to either install a parapet that can withstand these specific loads or to anchor the railing directly to the ceiling, independently of the parapet. These measures are crucial to ensure the safety and stability of the structure.

The accessories for the overtec Attika are supplied in full and are carefully packed and counted in a box on one of the pallets to ensure that everything arrives at the construction site in its entirety. Each box of approved overtec OneBit screwing devices contains a suitable bit, so no time is wasted searching. All the necessary tools are available on site for installing the Attika, including a rubber hammer, a spirit level, a snap cord and a cordless screwdriver. No other tools are required for assembly, which makes the process efficient and uncomplicated.

The bracing of the overtec parapet during the construction phase is crucial for two main reasons. Firstly, higher pressures are created in the lower part of the parapet during the concreting process. These pressures can also be absorbed using a perimeter adhesive (on brickwork or sand-lime brick). Secondly, during construction, a vertical elevation is important, which is aligned using a spirit level. Both requirements can be met by an outward-facing support, such as a Doka girder construction or a simple bracing in the slab formwork. Alternatively, the parapet elements can also be braced inwards using wire. The wire is attached to the upper end of the parapet element and connected to the reinforcement at the lower end at an angle of around 45 degrees. This method eliminates the need for external bracing, as the concrete pressure is absorbed by a 90x90 angle, which also connects the parapet to the building.

In order to optimally support the overtec parapet during the concreting process, targeted measures are required to effectively manage the concrete pressures that occur. There are two main methods available for the cast-in overtec variant: Firstly, an angle connection can be used in the lower area of ​​the parapet element between the masonry and the parapet, which is particularly suitable for concrete substrates. Secondly, an adhesive connection downwards, mainly for brick substrates, is possible using perimeter adhesive, which is included in the scope of delivery and is sufficient for 15 linear meters of parapet with one can. In addition, regular spreading outwards is recommended to absorb the concrete pressure on the parapet. A combination of these measures, i.e. either the connection to the masonry by screwing or gluing and additional spreading every third to fourth element, not only ensures secure support, but also the correct alignment of the parapet.

The Attika cover plate is included in the scope of delivery and is dimensioned and manufactured to exact dimensions during the ordering process. Since the system is designed as an overall concept, it is advisable to include the cover plate when ordering. It is particularly important to specify the corners, as there is a waste of the cover plate at each corner. We calculate this waste in advance to ensure that sufficient material is available for your project. This way you can be sure that the cover plate fits perfectly and that your construction project runs smoothly.

The slope of the overtec Attika cover plate is usually tailored to the required conditions and is normally 5 degrees. This slope is created by milling on the cover plate, so that no additional instructions are necessary for the installers. This ensures that there are no errors in the slope formation during execution. This well thought-out system enables error-free and efficient installation of the Attika cover plate.

The cover plate has a milling on the underside that corresponds to the future gradient of the construction. Eight drill holes and countersinks allow the screwing from above into the end grain of the parapet plate, which ensures stable fastening. In Germany in particular, a support angle is also supplied in the Ichsen area, which is used once or twice per element. This angle is bent at a 95-degree angle to accommodate the gradient and thus increase the overall stability of the construction.

Pre-drilling in the overtec parapet panel is important to ensure safe and stable installation. Especially with panel materials with a high cement content that has already hardened strongly, there is a risk that screws will break without pre-drilling. Over time, these panels become harder, which underlines the need for pre-drilling. In addition, pre-drilling is a mandatory requirement in the OneBit approval, which further highlights the importance of this step in the installation process.

To apply a seal to the overtec parapet, the process begins with the application of a vapor barrier on the ceiling, which is led vertically up the parapet element. This vapor barrier is usually created using a special coating or a single-layer bitumen sealing layer. It is possible to drill through this seal at certain points, as long as the holes are then closed with screws, as these have a higher vapor impermeability than the vapor barrier itself, and the angle rests firmly on the vapor barrier. The actual seal, usually a two-layer bitumen sheet, is then broken over two 45-degree angles and led vertically up the parapet over the cover plate. Due to the high fire protection properties of the material, it can be flame-sealed directly on the parapet, which ensures a safe and permanent seal.

To attach a parapet sheet to the overtec parapet, the process begins with attaching a hem strip, which is fixed to both the inner and outer ends of the cover plate using a screw connection. A layer of fleece is then applied. This separation between the overtec parapet cover plate and the sheet is important so that the cement content does not attack the material of the parapet cover plate. Finally, the parapet sheet can be easily hung over the previously attached hem strips, which ensures a stable and permanent attachment.

It is generally recommended to screw the hem strip of the Attika cover plate, as this ensures a safe and stable fastening. For this purpose, there are tested screwing devices, such as those offered by AURO Befestigungssysteme GmbH. This company also sells the cordless round magazine screwdriver, with which the sheet metal can be fastened efficiently and safely. In contrast, nailing the hem strip in the Attika cover plate can lead to breakouts on the back, and often the nails do not fully penetrate the hard overtec material, which makes subsequent tapping down necessary. Screwing is therefore the preferred method to ensure optimal durability and stability.

The overtec parapet with screw connection is particularly suitable for the renovation of buildings. During thermal renovations, the flat roof structures and the facade are often removed, leaving only the ceiling and masonry. Since the building is often still inhabited during the renovation, rapid construction progress without heavy work such as concreting is crucial. The screwable overtec parapet makes it possible to install a new parapet quickly and with minimal effort. It must be taken into account that the substrate may be uneven, which requires additional preparation. This can be achieved by leveling the area with a grinding wheel or by placing plastic discs under the parapet element. This flexible solution ensures an efficient and smooth renovation.

The most cost-effective variant of the overtec parapet is the ECO version cast in concrete. This is made from a FOLT-B1 panel, which is slightly cheaper than the CORD-A2 quality. It should also be remembered that the FOLT-B1 quality is not as dimensionally stable as the CORD-A2 panel material. This solution saves numerous work steps on the construction site, which makes it particularly economical. A key advantage of this variant is that no separate ceiling edge formwork is required, as the parapet already performs this function. This significantly reduces the effort, which not only saves time but also costs, without having to compromise on quality and functionality.

The delivery time for the overtec attic is generally 2 to 6 weeks, although it depends heavily on seasonal workload. To speed up delivery, there are a few factors that should be taken into account: The more precisely the submitted documents are prepared, the faster the order can move into the production phase. The easiest way to ensure this is to use our order forms by entering the required heights directly into the existing overtec cuts. This makes the process efficient and significantly shortens the delivery time. Find out about our current delivery times from your contact person.

There are several options available to you to receive a quote for an overtec attic. The quickest way is to fill out our order forms. As soon as you send us the sections you have measured, we can immediately prepare a quote or prepare the product for production. Alternatively, you have the option of contacting your regional contact directly. You can find the contact details of your sales representative on our website in the "Contact" section. This way we ensure that you receive all the information you need quickly and easily.

Depending on the raw material used, the overtec Attika meets different fire protection standards, namely B1 or A2. The FOLT B1 quality is the cheaper option, while the CORD A2 quality impresses with its higher quality and dimensional stability. In fire protection tests at the Materials Testing Institute (MPA) in Dresden, the 32mm A2 panel achieved a value of over EI60, while the 40mm A2 panel even achieved a value of over EI90. These values ​​underline the high safety and reliability of the overtec Attika in the fire protection sector.

The height of an overtec parapet is largely determined by the splash water area and the drainage guidelines, which is why it should protrude at least 15 cm above the roof structure. However, visual requirements often also play a role, as roof installations such as air conditioning systems or photovoltaic elements should be hidden so that they are invisible from below. For this reason, the parapet is often designed at a height of between 50 cm and 100 cm in order to meet both functional and aesthetic requirements.