Construction process of exterior wall rock wool insulation board

In the construction industry, the selection of external wall insulation materials and the quality of construction directly affect the thermal insulation performance and service life of buildings. Rock wool insulation boards, due to their superior thermal insulation performance, fire resistance, and excellent durability, have become a preferred insulation material for architects and construction companies. Today, we will discuss in detail the construction process of external wall rock wool insulation boards to help construction personnel better understand each step, ensuring project quality and thus improving the overall performance of the building.

 I. Construction Preparation

Before installing rock wool insulation boards, thorough preparations are necessary. These preparations include:

1. Material preparation:

   - Ensure that the quality of the rock wool insulation board meets the relevant standards, and check whether the dimensions, density and appearance of the insulation board are intact.

   - Prepare the appropriate adhesive materials, such as polyurethane glue, plaster, etc., and confirm the shelf life and suitability of these materials for construction.

   - Gather necessary auxiliary materials, such as anchors, mesh fabric, and waterproof coatings, which will be used in subsequent processes.

2. Tool preparation:

   - Check the tools required for construction, such as cutting tools, scrapers, spirit levels, measuring tapes, spray guns, etc., to ensure that all tools are in good working order and usable.

3. Construction site preparation:

   - Clean the construction site to ensure that the wall surface is dry, flat, and free of dust, oil, and other debris that may affect adhesion.

   - Ensure that the construction site has complete safety facilities, and set up construction fences and warning signs to protect the safety of construction workers.

 II. Measurement and Cutting of Rock Wool Insulation Boards

After the preparations are complete, the installation of the exterior wall rock wool insulation boards can begin. The first step is to accurately measure and cut the insulation boards.

1. Measurement:

   - Use a measuring tape to take detailed measurements of the wall surface and record the dimensional changes between different locations.

   - Mark the specific locations where rock wool insulation boards need to be installed, which will facilitate subsequent construction.

2. Cutting:

   - Based on the measurement results, the rock wool insulation board is cut using a special cutting tool.

   - When cutting, ensure the cuts are straight and neat to avoid unnecessary waste.

 III. Installation of Rock Wool Insulation Boards

The cured rock wool insulation board provides significant heat insulation, and the next step is to install it.

1. Applying adhesive:

   Apply adhesive material evenly to the back of the rock wool insulation board. The coating thickness should typically be between 8-12mm.

   - Be careful to avoid applying glue to the edges to prevent the adhesive from becoming weak.

2. Paste:

   - Quickly attach the insulation board with the applied adhesive to the wall, repeating the process as needed to avoid prolonged application which could reduce the bonding strength.

   - During the pasting process, press it down with your hands as much as possible to make it adhere tightly to the wall and ensure that there are no hollow spots.

3. Adjustments:

   - Use a spirit level to check the verticality and flatness of the insulation board. If there is any deviation, make adjustments in time.

 IV. Anchoring Treatment

To enhance the stability of the rock wool insulation board, anchoring is required after installation.

1. Anchor bolt drilling:

   - Drill holes at the four corners and the middle of the rock wool insulation board to ensure that the anchor bolts can penetrate the insulation board and the base.

   - When drilling, pay attention to the depth and angle of the hole to avoid damaging the insulation board.

2. Install anchor bolts:

   - Secure the anchor bolts in the pre-drilled holes, ensuring that each anchor bolt is firmly in place.

   - The spacing of the anchor bolts should be arranged according to the requirements of the client and the design specifications. Generally, the spacing should be controlled between 300-500mm.

 V. Laying of the mesh fabric

After the entire insulation board is installed, the mesh fabric needs to be laid. This is an important step to enhance the weather resistance of the insulation layer.

1. Lay the mesh fabric:

   - Apply adhesive evenly to the surface of the rock wool insulation board, and then lay the mesh fabric as required.

   - The mesh fabric should be fully stretched and can be overlapped. The seams should be pressed firmly to ensure there are no bulges.

2. Grouting and treatment:

   - After the mesh fabric is laid and the glue has dried completely, fill the gaps with plaster or other materials to ensure that the joints are flat and aesthetically pleasing.

 VI. Surface Treatment and Coating

The final step is to treat and paint the exterior walls, which not only enhances their aesthetics but also increases their protective properties.

1. Primer:

   - Apply a primer to the surface of the mesh fabric to enhance the adhesion between the coating and the surface.

2. Topcoat application:

   - Select appropriate exterior wall paint for topcoat application according to design requirements. It is usually done in two to three coats to ensure a uniform and complete coating.

   - Pay special attention to the evenness of the coating and the drying time to avoid peeling of the coating due to improper application.

3. Quality Inspection:

   - After the entire construction is completed, a comprehensive quality inspection will be conducted to ensure that all aspects meet the standards, and rework will be carried out if necessary.

Summarize

The above is a detailed process for the construction of exterior wall rock wool insulation boards. Every step in the construction process is crucial; even slight negligence can affect the insulation effect and service life. Therefore, it is essential to strictly adhere to construction standards to ensure accuracy at every step and create a high-quality exterior wall insulation layer. Hopefully, this article will help you gain a deeper understanding of the construction process for exterior wall rock wool insulation boards, enabling every construction worker to easily get started and create excellent project results.