Innenwand dämmen ohne Schimmel – 5 Dinge auf die du achten solltest!

Naturbaustoffhaus

27 Mar 202210:35

Summary

TLDRThis video discusses the process of interior wall insulation, focusing on when and why it's necessary. The presenter, a certified building technician, explains the importance of proper preparation, including checking for moisture and removing plaster. Key points include avoiding insulation if moisture is present, managing window insulation, and addressing thermal bridges in adjacent walls. The video highlights the use of natural building materials like wood fiber and hemp fiber and advises on insulation thickness. A specific wall construction method using clay and insulation boards is also recommended.

Takeaways

😀 Only insulate interior walls if exterior insulation is not possible.
🏠 Proper preparation is essential before starting interior wall insulation.
🪟 Windows must be insulated with the same thickness as the interior wall insulation to avoid condensation.
⚠️ Avoid using interior insulation if the exterior wall is consistently wet.
💧 If the building is old and subject to rising damp or salt buildup, address those issues before insulating.
👷‍♂️ Gypsum plaster should be removed before insulation because it cannot handle moisture.
🔨 Check for existing layers like felt or foil in the wall before starting the insulation process.
🧱 Consider using natural insulation materials like wood fiber or hemp fiber for better performance.
🏡 Insulate the connecting interior walls slightly to prevent cold bridges.
⚡ Limit insulation thickness to 40-60mm to avoid moisture issues, and use clay plaster as a moisture buffer.

Q & A

Why is interior insulation recommended only when exterior insulation is not possible?
-Interior insulation is recommended only when exterior insulation is not feasible because exterior insulation is generally more effective. It avoids issues like cold areas and thermal bridges, which can lead to condensation and mold. However, interior insulation is necessary in cases like historical preservation, cost concerns, or architectural limitations.
What are the key preparations required before installing interior insulation?
-Key preparations include checking for rain exposure on the building’s exterior, assessing moisture levels, inspecting for salt damage, and ensuring there are no existing moisture problems like rising damp. These issues should be addressed before proceeding with interior insulation to avoid trapping moisture.
Why is it important to remove gypsum plaster before adding interior insulation?
-Gypsum plaster must be removed before adding insulation because it cannot handle moisture well. If insulation is added over gypsum, condensation can occur at the interface, causing the plaster to deteriorate and compromise the insulation system.
What role do windows play in interior insulation, and what should be considered?
-Windows are critical in interior insulation because the thermal insulation of window reveals must match the wall insulation to avoid condensation. This can be challenging if windows are already installed, as it may limit the thickness of insulation that can be added around them.
What are ‘flanking elements,’ and why are they important in insulation?
-Flanking elements refer to interior walls that connect to the exterior insulated walls. These can create thermal bridges if not properly insulated, leading to cold spots and potential condensation. It's important to extend insulation slightly into these areas to maintain consistent thermal performance.
What is the recommended thickness for interior insulation, and why?
-The recommended thickness for interior insulation is typically 40-60 mm. Insulating thicker than this can shift the dew point too far into the wall, increasing the risk of condensation and moisture problems. Thicker insulation also makes the wall more difficult to keep dry.
What is a typical material setup for interior insulation?
-A typical setup involves a base layer of clay for moisture buffering, followed by a wood fiberboard for insulation, and finished with another layer of clay plaster. This arrangement helps manage moisture and provides effective thermal performance without needing a vapor barrier.
Can a vapor barrier be omitted in interior insulation, and if so, why?
-Yes, a vapor barrier can often be omitted if materials like clay are used, as they naturally regulate moisture. The clay acts as a buffer, allowing water vapor to move through without causing condensation, making additional vapor barriers unnecessary in many cases.
What are some common issues when insulating around windows?
-Common issues include insufficient space for insulation due to existing window frames, leading to condensation at the window edges. Solutions include removing or adjusting window reveals or increasing the thickness of insulation in these areas to prevent cold bridges.
How does the insulation material choice affect the performance of interior insulation?
-Different materials, like wood fiber or hemp fiber, affect the thermal and moisture management properties of the insulation. Each material has its strengths, with some offering better breathability or moisture buffering. Choosing the right material depends on the specific conditions of the building.

Outlines

00:00

🏡 Essential Steps for Insulating Interior Walls

The paragraph discusses the necessity and steps for insulating interior walls, particularly when exterior insulation is not feasible. It emphasizes that interior insulation is only recommended if exterior insulation is not possible, such as due to architectural constraints or preservation requirements. The speaker outlines five key steps for interior wall insulation: assessing the need for insulation, preparing the site, understanding the importance of window insulation, addressing flanking building parts, and determining the specific construction method. The paragraph also touches on the importance of checking for water damage, addressing moisture issues, and the potential complications of applying insulation over gypsum plaster.

05:02

🛠️ Detailed Considerations for Interior Insulation

This paragraph delves into the specifics of interior insulation, including the types of insulation materials like wood fiber and spray foam. It highlights the importance of insulating windows to prevent moisture problems and the need to match the insulation thickness to that of the wall. The speaker also addresses the challenges of insulating flanking building parts, which are areas where interior and exterior walls meet, and the potential for thermal bridging if not properly insulated. The paragraph concludes with a discussion on the appropriate thickness of insulation materials, cautioning against overly thick insulation that could lead to increased moisture problems.

10:03

🌿 Conclusion and Call to Action for Natural Building Materials

The final paragraph summarizes the video's content and encourages viewers to subscribe to the channel for more information on natural building materials. It reiterates the importance of proper insulation techniques and the use of natural materials, suggesting that viewers reach out for further consultation or to schedule a phone appointment. The speaker also mentions the availability of building materials through their natural building material store, reinforcing the channel's commitment to sustainable and eco-friendly construction practices.

Mindmap

Keywords

💡Insulation

Insulation refers to the reduction of heat transfer between objects in thermal contact or in a range of temperatures. In the context of the video, insulation is crucial for energy efficiency and comfort within a building. The script discusses both external and internal insulation methods, emphasizing the importance of proper insulation to prevent mold and ensure a warm living environment.

💡Mold

Mold is a type of fungus that grows in damp conditions. The video script mentions the desire to prevent mold growth on interior walls, which can be a health hazard and cause structural damage. Insulation plays a role in mold prevention by regulating moisture and temperature within the building.

💡External Insulation

External insulation involves applying insulating materials to the outside of a building's walls. The script suggests that this is the preferred method when possible, as it allows for better control over moisture and prevents issues like mold. However, it also acknowledges situations where internal insulation might be necessary due to constraints like heritage protection or cost.

💡Internal Insulation

Internal insulation is the process of insulating the interior side of a building's walls. The video discusses this as an alternative when external insulation is not feasible. It highlights the need for careful preparation and execution to avoid issues like increased moisture and thermal bridging.

💡Thermal Bridge

A thermal bridge occurs when there is a direct path for heat to escape, leading to increased energy loss and potential cold spots within a building. The script mentions thermal bridges in relation to areas where insulation might be less effective, such as corners and edges, and the importance of addressing these in insulation planning.

💡Moisture

Moisture is a critical factor in insulation effectiveness. The video script warns against internal insulation in areas with high moisture levels, as it can lead to problems like mold and structural damage. It emphasizes the need to address moisture issues before proceeding with insulation.

💡Plaster

Plaster is a building material used for coating walls and ceilings. The video mentions the need to remove plaster before internal insulation, as it can trap moisture and lead to problems. This is an important step in the preparation process for insulation.

💡Flanking Elements

Flanking elements are parts of a building's structure that are adjacent to the main walls and can affect the overall insulation performance. The script discusses the need to consider these elements when planning insulation, as they can create thermal bridges if not properly insulated.

💡Vapor Barrier

A vapor barrier is a material that prevents moisture from passing through it. The video script briefly touches on the concept of vapor barriers, suggesting that they can be used to manage moisture within the building envelope, which is essential for the success of insulation efforts.

💡Insulation Thickness

Insulation thickness refers to the depth of the insulating material applied. The video script advises against overly thick insulation, as it can exacerbate issues like moisture buildup and thermal bridging. It suggests a maximum thickness to maintain the effectiveness and safety of the insulation.

💡Natural Building Materials

Natural building materials are those derived from the earth or plants, such as clay, straw, or wood. The video script mentions the use of natural materials like clay for an insulating layer, highlighting their environmental benefits and suitability for certain types of insulation.

Highlights

Innendämmung should only be used if external insulation is not possible, such as in cases of building preservation or high costs.

Thorough preparation is key: check for rain exposure, wall moisture, and structural issues before applying insulation.

Moisture in exterior walls can lead to problems with interior insulation, such as condensation and damage.

If there is significant moisture in walls due to factors like capillary rise, it should be resolved before starting the insulation process.

Gips (gypsum) plaster should be removed before insulation, as it cannot handle moisture and could rot.

When insulating around windows, ensure that insulation thickness is consistent to avoid condensation issues near the frames.

Watch out for cold bridges in areas where interior and exterior walls meet, as they can cause temperature issues if not insulated properly.

Damp problems around the foundation should be addressed before insulating, as moisture buildup can lead to insulation failure.

For best results, use breathable natural materials like wood fiber or hemp for insulation.

Internal insulation should not exceed 40-60mm in thickness to avoid moisture problems and maintain breathability.

In cases of damp issues, wall heating can be a solution to control moisture and temperature, eliminating the need for thick insulation.

When applying insulation, avoid using vapor barriers if the material is breathable; materials like clay can act as a natural moisture regulator.

Insulation should always be adapted to the specific characteristics of the building, such as wall material and exposure to weather.

Additional consultation and specific advice based on your building’s needs can be arranged through Naturbaustoff, including phone and video consultations.

Using a combination of natural materials like clay and wood fiber can offer an effective insulation system while preventing condensation issues.