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Top 5 Frequently Asked Questions
Getting Started & System Overview
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System Structure & Components
Installation & Construction
Materials & Sustainability
Purchasing, Pricing & Support
Top 5 Frequently Asked Questions
Getting Started & System Overview
Applications & Technical Specifications
System Structure & Components
Installation & Construction
Materials & Sustainability
Purchasing, Pricing & Support

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Top 5 - Frequently Asked Questions

Water damage does not immediately cause the wall structure to fail. As part of our product testing, drywall walls using SORIWA Multi Profiles were constructed in such a way that the lower sections of the walls were deliberately submerged several centimetres in water – to simulate typical damage scenarios. Once the water had dried out, the profiles dried out, and their original dimensional stability was restored. Whether the wall needs to be repaired must be assessed on a case-by-case basis depending on the extent of the damage – just as with any other drywall system.

The SORIWA Multi Profile is classified as building material class E in accordance with DIN EN 13501-1 and is therefore approved for use in interior construction in Germany.
In tested wall constructions with double sheathing using a gypsum board (GKB) or a gypsum fiber board (GKF), fire resistance classes EI30 and EI60 according to DIN EN 13501-2 are achieved, depending on the design. Under German building regulations, this corresponds to fire resistance classes F 30-B and F 60-B.

As part of the acoustic tests conducted in accordance with DIN EN ISO 717-1, the following sound reduction index (Rw) were determined for the SORIWA Multi Profile: 44.2 dB for single-layer board cladding and 52.3 dB for double-layer board cladding.

Our list prices and discount structure follow standard market conditions used by leading manufacturers of steel profiles. For a specific quote, please contact your authorized dealer – they will be happy to provide you with a customized price estimate.

Use our dealer locator to find an authorized dealer.

Our products are available through authorized dealers. We are currently in the process of establishing and expanding our distribution network. Click here to find a retailer near you. If your local retailer does not yet carry our products, please feel free to contact us – we will work with you to find a solution: info@soriwa.de

Getting Started & System Overview

The SORIWA Multi-System represents a completely new approach to interior construction. At its core is the SORIWA Multi Profile, a multi-layered fibre profile which together with the SORIWA Connector and the SORIWA Core, forms a modular system – replacing all the traditional components (C-track, U-stud, UA-profile) of a conventional stud frame. The result: a completely steel-free drywall system – easy to install, resource-efficient, and with a significantly reducing the risk of injury by eliminating sharp-edged metal profiles.

  • One profile instead of three: replaces the entire conventional steel or wood framing
  • Safe to handle: no sharp edges, minimized risk of injury, comfortable to the touch, lightweight
  • No change to established working methods: familiar machining with standard tools, fine- and coarse-threaded screws, and the usual procedures
  • Climate-friendly material: made from recycled cellulose with a negative carbon footprint (EPD)
  • Forward-thinking: recyclable and resource-efficient

In the SORIWA Hybrid-System, SORIWA Multi Profiles replace the conventional steel C-studs. The U-tracks and UA-profiles are still made of steel. Our SORIWA Multi Profiles are precisely designed to fit standard metal drywall profiles. This allows up to 80% of the steel in a wall construction to be replaced.

Yes, the SORIWA Multi Profile is a building authority approved product. It has a general building approval (abZ) and bears the Ü mark. This means it may generally be used in construction projects in Germany.

Certified documentation is available for relevant applications (e.g., wall constructions) regarding sound insulation, fire performance, emissions, and mechanical load-bearing capacity. The profile can therefore also be used in projects with special requirements.

The SORIWA Connector is a connecting element that, when used in conjunction with the SORIWA Multi Profile, allows the SORIWA Multi Profile to function as both a C-stud and U-track.

The SORIWA Core is a precision-cut square timber insert that is inserted directly into the SORIWA Multi Profile in door openings. It provides additional stability and creates a continuous support surface for drywall boards. When used together, the system replaces a traditional UA profile – completely steel-free.

Yes, all SORIWA products have undergone extensive testing and evaluation – both internally during development and by independent testing organisations. You can find documentation confirming their quality and sustainability directly on each product page, where technical documents and EPDs are available for download.

Applications & Technical Specifications

No. SORIWA Multi Profiles are currently suitable for non-load-bearing interior partitions.

SORIWA Multi Profiles, including the connectors, have undergone the same certification tests as traditional steel profiles. They are structurally sound for non-load-bearing interior walls in accordance with DIN 4103-1.
Bracket loads – for example, for mounting a television – were also determined and evaluated as part of the standard tests. The permissible loads depend on the specific wall construction (e.g., profile width 50/75/100 mm, single or double sheathing, with OSB reinforcement if applicable). The minimum requirements according to installation zones EB1 (0.4 kN/m) and EB2 (1.0 kN/m) are met.

If you plan to use the SORIWA Multi Profile as a replacement for UA profiles, you will also need the SORIWA Core for reinforcement. This is inserted precisely into the SORIWA Multi Profile and, when combined with angle brackets fixed to the floor and ceiling, provides the necessary stability. Please feel free to contact us for structural details or project-specific solutions.

The SORIWA Multi Profile can be used directly in place of a conventional U-tracks. It performs the same function in the frame construction while being steel-free and resource-efficient. The SORIWA Connector, made from recycled cellulose fibres and screwed onto the end of the SORIWA Multi Profile, connects the profiles. It creates a stable yet flexible connection between multiple SORIWA Multi Profiles. This allows the SORIWA Multi Profile to be used as a full replacement for traditional U-tracks and C-studs in drywall construction.

The SORIWA Multi Profile can also be used in a hybrid system – in combination with U-tracks or UA-profiles. This allows up to 80% of the steel in the wall to be replaced – without compromising structural stability.

The SORIWA Connector is required so that the SORIWA Multi Profile can also be used as an UW and CW profile. This connecting element connects two profiles (CW and UW) with a precise mechanical connection, thereby enabling their use as floor or ceiling connection profiles. In this way, a single profile (SORIWA Multi Profile) becomes a complete, versatile drywall system – suitable for both CW and UW applications.

The goal of the SORIWA Multi-System is to replace the wide variety of traditional drywall profiles with a single, integrated system solution. The SORIWA Connector allows the Multi Profile to be used as both a U-track and an C-stud – thus laying the foundation for a completely steel-free drywall system.

Yes, SORIWA Multi Profiles, when used in combination with the SORIWA Connector, have undergone the same certification tests as conventional steel profiles. They meet the structural requirements for non-load-bearing interior walls in accordance with DIN 4103-1.

The SORIWA Core is a precision-cut timber insert that is inserted directly into the SORIWA Multi Profile. It provides the profile with the necessary stability for door installations. Functionally, together with the SORIWA Multi Profile, it serves the same purpose as a UA-profile in traditional drywall construction.

The SORIWA Header Track can be used for the following door opening widths: min. 770 mm, 895 mm, and max. 1,020 mm.

System Structure & Components

Yes, the SORIWA Multi Profile can be used in areas subject to temporary moisture exposure (e.g., residential bathrooms up to max. water exposure class W0-I and W1-I) in combination with suitable gypsum boards (GKBI) and professional sealing in accordance with DIN 18534-1.

Yes, when exposed to prolonged contact with water, the cellulose fibres absorb moisture, which can cause the profile to expand slightly, but not to a critical extent. However, thanks to the water-resistant binder used, the fibres remain structurally bonded, so that the original dimensional stability is restored once the material dries.

Water damage does not immediately cause the wall structure to fail. As part of our product testing, drywall walls using SORIWA Multi Profiles were constructed in such a way that the lower sections of the walls were deliberately submerged several centimetres in water – to simulate typical damage scenarios. Once the water had dried out, the profiles dried out, and their original dimensional stability was restored. Whether the wall needs to be repaired must be assessed on a case-by-case basis depending on the extent of the damage – just as with any other drywall system.

All components of a traditional drywall system are sensitive to moisture – whether due to mold growth on gypsum boards and insulation materials or corrosion of steel profiles. SORIWA Multi Profiles are also not designed to withstand prolonged moisture exposure.
As part of official long-term tests conducted at testing institutes – based on Service Class 2 according to DIN EN 1995-1-1 – the profiles were tested under conditions where the relative humidity exceeds 85% for several weeks a year, as occurs in covered, open structures. The profiles showed no signs of mold growth, nor did the fasteners lose the necessary hold.

The SORIWA Multi Profile is classified as building material class E in accordance with DIN EN 13501-1 and is therefore approved for use in interior construction in Germany.
In tested wall constructions with double sheathing using a gypsum board (GKB) or a gypsum fiber board (GKF), fire resistance classes EI30 and EI60 according to DIN EN 13501-2 are achieved, depending on the design. Under German building regulations, this corresponds to fire resistance classes F 30-B and F 60-B.

As part of the acoustic tests conducted in accordance with DIN EN ISO 717-1, the following sound reduction index (Rw) were determined for the SORIWA Multi Profile: 44.2 dB for single-layer board cladding and 52.3 dB for double-layer board cladding.

Installation & Construction

Yes, the 62.5 cm grid spacing can be used in installation zone 1 – that is in areas with normal usage such as apartments, hotel rooms, offices, hospital rooms, or similar spaces, including hallways.

The layout of the drywall board joints (installation pattern) follows standard drywall practices and is comparable to that of conventional materials.

Mechanical tests in accordance with DIN 4103-1 have been successfully conducted for installation zones 1 and 2 up to a wall height of 4 m. Our standard profiles are available in lengths of 3.00 m, 3.50 m, and 4.00 m. We are happy to supply custom lengths upon request.

All standard drywall screws with coarse or fine threads (Ø 3.5 mm, length > 25 mm) are suitable for installation.

The SORIWA Multi Profile can be easily cut to size using any standard tools - such as miter saw, hand saw, or similar tools.

All standard gypsum boards (GKB, GKBI) as well as gypsum fibre boards, wood-based panels (e.g., OSB), clay building boards, and straw boards are compatible.

Yes, that’s no problem at all. You can easily choose the position of the cable opening yourself – just drill a hole in the desired spot using a hole saw. Make sure to leave a gap of about 30 cm between the opening and the floor or ceiling, and about 1 cm between the opening and the edge of the profile.
The stability and structural integrity of the SORIWA Multi Profiles have been tested for the following cutout sizes. This results in the following maximum cutout sizes:

SORIWA Multi Profile 50 = Cutout ≤ 28×50 mm; Drill hole Ø 20 mm
SORIWA Multi Profile 75 = Cutout ≤ 53×75 mm; Drill hole Ø 53 mm
SORIWA Multi Profile 100 = Cutout ≤ 78×100 mm; Drill hole Ø 70 mm

Another advantage: Our profiles have no sharp edges. This not only protects pipes, cables, and other components from damage, but also reduces the risk of injury during installation.

The SORIWA Connector slides into the ends of the SORIWA Multi Profiles without the need for tools. Its shape ensures a secure mechanical connection, and it is then secured with screws on the back side.

The SORIWA Core is a precision-cut timber insert that is inserted directly into the SORIWA Multi Profile – no additional fastening is required. It provides the profile with the necessary stability for door installations and, when combined with the SORIWA Multi Profile, serves the function of a traditional UA-profile. It is secured to the floor and ceiling using a bracket.

The SORIWA Core simply slides into the SORIWA Multi Profile – no special tools required. For additional security, a screw can be inserted at any point if needed.

Secure the SORIWA Header Track at the desired height using either a single-sided adhesive strip or, alternatively, a screw through the profile. Both methods ensure secure positioning during installation.

For proper storage, SORIWA Multi Profiles should be kept dry, flat, and ideally in their original packaging. Direct contact with water must be avoided. If stored outdoors for a short period, a waterproof cover is required.
As a general rule: Store the profiles just as you would store gypsum board – not in the rain or snow, and not on damp surfaces. Temporary increases in humidity generally do not pose a problem for SORIWA Multi Profiles. In accordance with Service Class 2 per DIN EN 1995-1-1, the profiles were tested under climatic conditions where relative humidity exceeds 85% for only a few weeks per year – comparable to covered, open structures. The profiles showed no mold growth. In such situations, many cladding materials react much more sensitively.

Materials & Sustainability

Our multi-layer SORIWA Multi Profiles are made from recycled cellulose combined with a wet-strength binder. The controlled alignment of the cellulose fibres gives the material its high dimensional stability – while keeping its weight low (20% lighter than a comparable steel profile). The use of additional biocides or fire retardants has been deliberately avoided – with a focus on healthy indoor environments, sustainability, and resource conservation. A patent application has been filed for the product and the manufacturing process.

Like the SORIWA Multi Profile, the SORIWA  Connector is made of multi-layered, compressed recycled cellulose combined with a water-resistant binder. Here, too, the use of additional biocides or fire retardants has been deliberately avoided - ensuring a sustainable, health-conscious solution for drywall construction.

The SORIWA Core consists of kiln-dried spruce timber rough-sawn on all four sides. The wood moisture content of approximately 18% (KD) ensures dimensional stability, a precise fit, and minimal warping when used in building systems.

Like the SORIWA Multi Profile, the SORIWA Header Track is made from recycled cellulose fibre pulp combined with a water-resistant adhesive.

According to the EPD, the SORIWA Multi Profiles store more CO₂ than is emitted during production than is emitted during their production. As a result, they sequester carbon dioxide within the building.

Total GWP (kg CO₂-eq./linear meter) Modules A1–A3:
SORIWA Multi Profile 50 = –0.231
SORIWA Multi Profile 75 = –0.272
SORIWA Multi Profile 100 = –0.327

Yes, an EPD is available for the SORIWA Multi Profile, which you can download here.

Purchasing, Pricing & Support

Our list prices and discount structure follow standard market conditions used by leading manufacturers of steel profiles. For a specific quote, please contact your authorized dealer – they will be happy to provide you with a customized price estimate.

Use our dealer locator to find an authorized dealer.

Our products are available through authorized dealers. We are currently in the process of establishing and expanding our distribution network. Click here to find a retailer near you. If your local retailer does not yet carry our products, please feel free to contact us – we will work with you to find a solution: info@soriwa.de

The best place to start is at your local authorized dealer—they know our products and will be happy to help you choose the right one. You can find a dealer near you using our dealer locator.
You can also email or call us anytime—we’re happy to help.
You’ll also find plenty of practical information, usage tips, and news on our website and social media channels.