The installation of a linear drain in a residential building is possible, but it requires meeting specific technical conditions and appropriate preparation. At Onninen, as experts in installation solutions, we confirm that modern walk-in showers with linear drains can also be successfully installed in multi-family buildings.
The thickness of the ceiling and the ability to achieve the appropriate floor slope are crucial. We offer a variety of linear drains in our assortment that work well in both new constructions and during renovations of older apartments.
Before making a decision about installation, it is worth consulting with our specialists who will help select the optimal solution for the specific conditions of the building and the needs of the users.
Check linear drains at Onninen warehouse
What conditions must a residential building meet for the installation of a linear drain
From our many years of experience, it follows that the minimum ceiling thickness should be 11-15 cm to accommodate the drain along with the siphon and ensure the appropriate slope of the sewage pipe. Onninen also offers ultra-low linear drains dedicated to challenging installation conditions.
Technical requirements for different types of buildings
- New developer apartments: Ideal conditions for installation, especially before pouring the screed
- Large panel blocks: Require a thorough analysis of ceiling thickness, often necessitating the removal of the screed
- Old tenement houses: May require a comprehensive renovation of the sewage installation
- Apartments with underfloor heating: We recommend a wall drain from our offer
| Building type | Minimum ceiling thickness | Installation difficulty | Recommended type of drain |
|---|---|---|---|
| New construction | 12-15 cm | Easy | Standard |
| Blocks from the 70s-80s | 8-12 cm | Medium | Ultra-low |
| Large panel | 6-10 cm | Difficult | Wall-mounted |
Why choose a linear drain instead of a traditional shower tray
Professional linear drains from Onninen offer a range of benefits that will be appreciated by both installers and end users. Our many years of experience in the industry confirm that this solution significantly enhances the comfort of using the bathroom.
Functional advantages of a linear drain
- User safety: The absence of high thresholds eliminates the risk of tripping
- Optical enlargement of space: A uniform floor surface visually opens up the interior
- Ease of cleaning: A smooth surface without hard-to-reach corners
- Architectural accessibility: Ideal for elderly people and those with limited mobility
- Modern design: A minimalist look that fits contemporary arrangements
In our assortment, you will find bathroom equipment complementing the linear drain system, including modern faucets and sanitary ceramics.
When is the installation of a linear drain in a block not possible
As Onninen experts, we point out situations where the installation of a linear drain may be impossible or economically unfeasible. A reliable assessment of conditions is the basis for a successful project.
Technical limitations
- Too thin ceiling: Below 8 cm thickness prevents the installation of a standard drain
- Lack of access to the sewage stack: When pipes run in inaccessible places
- Problematic electrical installation: Wires in the area of drain installation
- Reinforced concrete structure: When it would require disturbing load-bearing elements
In such cases, we recommend alternative solutions from our offer, such as low composite shower trays or wall drains, which allow achieving a similar visual effect with lower installation requirements.
Step-by-step process of installing a linear drain in a block
The team of Onninen experts has prepared a practical installation guide that will help in implementing the linear drain project in an apartment in a block. Remember that precision in execution guarantees trouble-free operation for years.
Preparation stage
Start by accurately measuring the space and assessing the technical conditions. Check the ceiling thickness, the location of the sewage stack, and the possibility of achieving the appropriate slope of at least 2.5%. In our branches, you will receive professional advice on selecting the appropriate type of drain.
Substrate preparation
Remove the screed in the area of the drain installation, taking special care when working near installations. The depth of the removal should consider the height of the drain along with the siphon and the thickness of the future screed with the appropriate slope.
Drain installation and waterproofing
Install the drain according to the manufacturer's instructions, ensuring stable support and proper connection to the sewage system. A key stage is the execution of a tight waterproofing using liquid foil and sealing mats - products available in the Onninen offer.
Alternative solutions for challenging installation conditions
When a standard linear drain cannot be installed, we offer innovative alternatives at Onninen tailored to the specific requirements of residential blocks.
Wall-mounted linear drain
This solution installed in the wall eliminates problems related to limited ceiling height. A wall drain is an ideal option for apartments with underfloor heating or when there is no possibility of interfering with the floor structure.
Ultra-low floor drains
In our assortment, you will find drains with a build height starting from 70 mm, which work well 
even in the most challenging conditions. These specialized solutions allow installation in blocks with limited ceiling thickness.
Drains with the possibility of raising the floor level
When the room height allows, a system for raising the floor level can be applied. We offer complete installation kits that facilitate the implementation of such a solution.
Choosing the right siphon for a linear drain in a block
Our specialists' experience shows that the correct selection of a siphon is crucial for the functionality of the entire system. In Onninen's offer, you will find various types of siphons tailored to the specifics of residential blocks.
Dry siphons - ideal for blocks
We recommend dry or hybrid siphons that effectively prevent the backflow of odors from the sewage system - a common problem in multi-family buildings. A dry siphon works on the principle of a membrane that opens only during water flow.
Flow rate requirements
The flow rate of the siphon must be matched to the performance of the used shower fittings. For standard faucets in residential blocks, a flow rate of 30-40 l/min is sufficient, but for rain showers with higher performance, siphons with higher parameters are required.
Frequently asked questions
Can a linear drain be installed in an old large panel block?
Yes, installation is possible, but it requires a thorough analysis of technical conditions. In large panel blocks, it is often necessary to remove the screed and use ultra-low drains. Our experts recommend choosing models with a build height below 80 mm and conducting a thorough assessment of ceiling thickness before starting work.
How much does it cost to install a linear drain in a residential block?
The installation cost depends on the complexity of the work and the chosen type of drain. Basic installation in new construction costs 2000-4000 PLN, while in older blocks requiring screed removal, the cost can rise to 6000-10000 PLN. In Onninen's offer, you will find drains in various price ranges, tailored to every budget.
What slope is required for a linear drain?
The minimum slope should be 2.5%, but we recommend 3% for optimal water drainage. This means a height difference of 2.5-3 cm for every meter in length. Proper execution of the slope ensures effective water drainage and eliminates the risk of stagnation, which could lead to hygiene problems and unpleasant odors.
Does a linear drain require special waterproofing?
Yes, tight waterproofing is absolutely essential for safe installation in a block. We use multi-layer sealing systems that include liquid foil, sealing mats, and tapes in areas exposed to leaks. Onninen offers professional waterproofing materials that guarantee long-lasting tightness of the installation.
What are the alternatives to a linear drain in a block?
When the installation of a standard drain is not possible, we offer wall drains and ultra-low shower trays. A wall drain eliminates the need to interfere with the floor, while modern composite shower trays with a height starting from 30 mm provide a similar visual effect. All alternative solutions are available in our branches with professional technical advice.
Can a linear drain be installed independently?
Installation requires advanced plumbing and construction skills. Due to the risk of flooding the apartment and neighbors on lower floors, we recommend entrusting the work to a qualified installer. Our specialists can recommend proven contracting companies and provide professional technical advice at every stage of project implementation.
Investing in comfort and functionality of the apartment
The installation of a linear drain in a block is a decision that significantly raises the standard of bathroom use and the value of the property. As a leader in the installation market, Onninen offers comprehensive support - from selecting the right products to technical advice and assistance in finding qualified contractors.
A wide range of linear drains in our offer allows for the implementation of projects even in the most challenging construction conditions. Our experience gained in thousands of implementations confirms that with proper preparation and professional execution, a linear drain in a residential block is a functional and durable solution for years.
We invite you to contact our experts who will help you choose the optimal solution for your project. With a wide network of branches across Poland and a fast delivery system, we provide professional support at every stage of implementing a modern bathroom with a linear drain.