GU pre-wall frame
With the fully assembled GU pre-wall frame including its system components, we offer you an optimal installation frame for the secure and efficient installation and sealing around your wall opening. This allows door and window elements to be installed flexibly and just as easily as with conventional reveal installation, in any desired installation position in front of the masonry. In addition, our frame system is certified for burglar resistance up to RC3 according to EN 1627-1630, providing you with additional security. The excellent building physics properties enable thermal bridge-free and energy-efficient installation. At the same time, you effortlessly meet all structural requirements as well as the high standards regarding driving rain, wind, sound, and airtightness – regardless of the type of façade.
The tested system for pre-wall installation at a glance
- Effective sound insulation up to 46 dB according to DIN 4109
- Suitable for fall-proof element fixing according to DIN 18008 and ETB guideline
- RC3 approval according to EN 1627-1630
- Fire behaviour: approved according to EN 13501-1, class E and DIN 4102-1, class B1
- Approved for passive houses: Ψ = 0.01 W (m-K)
- Thermal bridge-free
- Thermal conductivity EN 12667:2001 λ = 0.0307 (W/mK)
- High characteristic load transfer up to 1233 kg/m
- High UV and weather resistance
- Large tolerance compensation for installation and building tolerances
- Window replacement in the façade without damage
- Installation and sealing according to the recognized rules of technology
The ideal solution for modern façade, window, and door elements
With the GU pre-wall frame, you can securely fasten and reliably seal your façade, window, and door elements. Thanks to its excellent insulation properties, it is perfectly suited for low-energy and passive houses and meets the highest requirements for energy efficiency and airtightness. The flexible pre-wall installation allows for easy integration of various building components, prevents thermal bridges, and is particularly advantageous for energy-efficient building renovations. Its robust construction and tested load-bearing capacity ensure that even heavy windows and doors are securely fixed – all in compliance with all relevant standards, including burglar resistance according to EN 1627-1630. With the GU pre-wall frame, you receive an efficient, durable, and cost-effective solution for your modern window installation.
GU front-mounted frame
- Material: rigid particle foam free of CFC made of EPS (expanded polystyrene)
- Easy to process, low bulk density
- Very high stability and elasticity
- The air enclosed in the foam beads ensures excellent thermal properties
GU mounting anchor
- System screw made of electro-galvanized steel with matching polyamide anchor sleeve, which is expanded by screwing the special screw into the plastic anchor
- Secure fastening for flush-mounted pre-frame installation on the load-bearing masonry with 70 mm edge distance from the drilled hole to the edge of the masonry and a 90 mm contact width of the GU pre-frame to the load-bearing shell
GU mounting anchor
- System screw made of electro-galvanized steel with matching polyamide anchor sleeve, which is expanded by screwing the special screw into the plastic anchor
- Secure fastening for flush-mounted pre-frame installation on the load-bearing masonry with 70 mm edge distance from the drilled hole to the edge of the masonry and a 90 mm contact width of the GU pre-frame to the load-bearing shell
GU assembly screw BE
- Ensures the proper fastening of the GU front-mounted frame to the supporting shell with a minimum edge distance of 45 mm from the drilled hole to the edge of the wall
- Easy to install thanks to the variable installation and adhesive width of the front-mounted frame from 65 to 90 mm to the masonry
GU assembly screw BE
- Ensures the proper fastening of the GU front-mounted frame to the supporting shell with a minimum edge distance of 45 mm from the drilled hole to the edge of the wall
- Easy to install thanks to the variable installation and adhesive width of the front-mounted frame from 65 to 90 mm to the masonry
GU assembly screw BE
- Ensures the proper fastening of the GU front-mounted frame to the supporting shell with a minimum edge distance of 45 mm from the drilled hole to the edge of the wall
- Easy to install thanks to the variable installation and adhesive width of the front-mounted frame from 65 to 90 mm to the masonry
GU 1C assembly adhesive
- Neutral, permanently elastic 1C adhesive and sealant based on hybrid polymer
- For airtight connection and fastening of the GU front-mounted frame to the masonry
GU 1C assembly adhesive
- Neutral, permanently elastic 1C adhesive and sealant based on hybrid polymer
- For airtight connection and fastening of the GU front-mounted frame to the masonry
GU front-mounted frame
- Material: rigid particle foam free of CFC made of EPS (expanded polystyrene)
- Easy to process, low bulk density
- Very high stability and elasticity
- The air enclosed in the foam beads ensures excellent thermal properties
Perfection in every component
The tested pre-wall frame system from Gretsch-Unitas combines the system components GU pre-wall frame, GU pre-wall anchor, GU installation screw BE, and GU 1K installation adhesive into an optimal installation frame. This ensures reliable installation and sealing around the wall opening.
GU pre-wall frame
GU pre-wall anchor
GU installation screw BE
GU 1K installation adhesive
Standards and safety requirements
Our tested pre-wall frame system guarantees professional installation and sealing in accordance with the recognized rules of technology – for your safety and the highest quality standards. With a system sound insulation value according to DIN 4109 of up to 46 dB, it provides effective sound insulation and a pleasant indoor climate. Thanks to RC3 certification according to EN 1627-1630, the pre-wall frame also offers reliable protection against burglary attempts. In terms of fire protection, the system is also impressive with approvals according to DIN 4102 (class B1) and EN 13501-1 (class E). In addition, the GU pre-wall frame is suitable for fall-proof fixing according to DIN 18008-4, thus ensuring maximum safety during installation. With our system, you meet all relevant standards for modern, safe, and standard-compliant installation of your façade, window, and door elements.
sound insulation requirements
DIN 4109 is a standard that sets requirements for sound insulation in living, sleeping, and working areas. Its aim is to ensure the health protection of residents and it provides minimum requirements, which, however, do not include claims for higher comfort. The standard was revised in 2016 and covers both airborne and impact sound insulation as well as sound protection against noise from building services installations. The requirements are specific to rooms in need of protection and may vary depending on the type of room and the external noise level.
Glass in construction Part 4
DIN 18008-4 is a standard that deals with the design and construction of fall-protection glazing. This standard specifies how glass must be used in construction to ensure safety against falls. It includes requirements for static and dynamic loads as well as safety measures to prevent glass breakage under load.
fire behaviour of building materials and components
The DIN 4102 standard deals with the fire behaviour of building materials and components. It defines the combustibility levels of materials as well as their fire resistance. The standard divides building materials into different classes, including non-combustible (Class A) and combustible materials (Class B), the latter being further subdivided into difficult to ignite (B1), normally flammable (B2), and easily flammable materials (B3). The latter are not permitted in Germany.These classifications help to assess how long a component retains its function in the event of a fire and contribute to safety through regulatory fire protection.
Classification of construction products and types of construction according to their fire behaviour
The DIN EN 13501 standard deals with the classification of the fire behaviour of building materials and construction products. It defines uniform criteria for assessing fire resistance, dividing materials into classes based on their reaction to fire. This includes aspects such as combustibility, smoke development and burning droplets. This classification is crucial for regulatory fire protection in Europe.
Series of standards for burglar-resistant building products
The standards EN 1627 to EN 1630 address burglary resistance of windows, doors and closures. They specify the requirements, classifications and test methods for products intended to protect against burglary attempts.- EN 1627 defines the general requirements and classifications.
- EN 1628 describes the test method for determining resistance under static load.
- EN 1629 covers the test method for determining resistance under dynamic load.
- EN 1630 focuses on the test method for determining resistance against manual burglary attempts.
These standards are crucial for construction products used in security-relevant areas.
General questions about the GU pre-wall frame
The GU pre-wall frame as a system solution offers an innovative way to securely fasten and seal your façade, window, and door elements. Here you will find answers to the most important questions.
