In the external wall insulation system, plastering mortar is the key link between the insulation board and the outer decoration. It not only ensures a stable fit of the insulation board, but also resists external environmental influences to prevent wall cracking and hollowing. Many construction teams have encountered issues such as insulation failure and wall damage in the later stages due to improper procedures. As a professional manufacturer of plastering mortar, today we will dismantle the correct construction process of plastering mortar for external wall insulation, help you master the standardized operation, and avoid common misunderstandings.
The first step in construction is mortar mixing, which is the foundation for ensuring subsequent performance. Strictly follow the ratio provided by the manufacturer - there may be differences in the ratio of water to dry powder for different types and batches of plastering mortar, and do not adjust it arbitrarily based on experience. Pour the dry powder of insulation mortar and clean water into the mixing bucket, and mix thoroughly with an electric mixer until the mortar forms a uniform and particle free paste. After mixing, let it stand for 2-3 minutes, and then perform a second slight mixing to make the mortar texture finer and the viscosity more moderate. Too thin mortar can lead to insufficient bonding strength and easy delamination; If it is too thick, it is difficult to apply evenly and may also cause cracking due to uneven distribution of internal moisture.
After mixing is completed, it enters the application process, with the core being to control the thickness and flatness. Apply the paste mortar evenly on the surface of the insulation board with a trowel, and the thickness should be precisely controlled at around 5 millimeters. This thickness can ensure sufficient contact between the mortar and the insulation board, form a strong bond, avoid virtual adhesion or gaps, and reserve space for the subsequent pressing of crack resistant materials. When applying, a ruler can be used for real-time calibration to ensure the overall smoothness of the mortar layer and avoid local over thickness or over thickness - local over thickness may cause cracks due to different drying shrinkage rates, while over thickness may not fully cover the insulation board, affecting the insulation and bonding effect.
The compaction and crack resistance treatment after application is the key to improving the durability of the wall. Immediately use insulation mortar board to compact the mortar layer as a whole, with even force, ensuring that there is no air interlayer between the mortar and insulation board, and thoroughly improving the bonding strength. Subsequently, according to the wall requirements, lay the alkali resistant mesh cloth or steel wire mesh flat on the mortar surface, and then gently press it into the mortar layer with a trowel to ensure that the mesh cloth/steel wire mesh is tightly adhered to the mortar. A 5-10 centimeter overlap width should be reserved at the edge to avoid gaps. Alkali resistant mesh fabric can meet the crack resistance requirements for ordinary exterior wall scenes, while steel wire mesh is recommended for high-rise and easily impacted areas to disperse the stress on the wall and effectively resist the risk of cracking caused by temperature changes and wall settlement.
The final step is the grinding treatment after solidification, laying the foundation for subsequent decoration. It is necessary to wait for the plaster mortar to fully cure, and the curing time needs to be adjusted according to the environment - it usually takes 24-48 hours under normal temperature (5-35 ℃) and good ventilation conditions, during which contact or rain should be avoided to prevent deformation of the mortar layer. After curing is completed, use a specialized insulation mortar scraper to grind the surface, smooth out the raised and rough areas, and make the surface of the mortar layer flat and consistent. A flat mortar layer can better adhere to subsequent decorative materials such as exterior wall coatings and bricks, avoiding hollowing and peeling of the decorative layer due to uneven surfaces.
As a manufacturer, it is important to remind everyone of several overlooked details: clean water must be used when mixing, as water containing impurities and oil stains can damage the composition of the mortar, affecting bonding and crack resistance; The construction environment temperature should be controlled between 5-35 ℃. Construction is prohibited on rainy or windy days, or when there is visible water on the wall. Low temperatures can delay curing, while high temperatures and strong winds can cause rapid dehydration and cracking of the mortar; Alkali resistant mesh cloth and steel wire mesh should be selected products that are compatible with the plastering mortar to avoid affecting the overall performance due to poor material compatibility. If you encounter any questions during construction, you can contact the manufacturer at any time for technical guidance to ensure that every step of the operation complies with the specifications.
There is no shortcut to the construction of exterior wall insulation plastering mortar. From mixing ratio to surface grinding, the rigor of each step directly affects the insulation effect, crack resistance, and service life of the exterior wall. Mastering the correct construction process can not only play the core role of plastering mortar, but also reduce maintenance costs in the later stage. As a professional manufacturer, we not only provide high-quality plastering mortar that meets standards, but also offer full process construction support to customers, helping them create durable and safe exterior wall insulation systems. Correct construction guide for exterior wall insulation plastering mortar: Each step is related to insulation and crack resistance
In the external wall insulation system, plastering mortar is the key link between the insulation board and the outer decoration. It not only ensures a stable fit of the insulation board, but also resists external environmental influences to prevent wall cracking and hollowing. Many construction teams have encountered issues such as insulation failure and wall damage in the later stages due to improper procedures. As a professional manufacturer of plastering mortar, today we will dismantle the correct construction process of plastering mortar for external wall insulation, help you master the standardized operation, and avoid common misunderstandings.
The first step in construction is mortar mixing, which is the foundation for ensuring subsequent performance. Strictly follow the ratio provided by the manufacturer - there may be differences in the ratio of water to dry powder for different types and batches of plastering mortar, and do not adjust it arbitrarily based on experience. Pour the dry powder of insulation mortar and clean water into the mixing bucket, and mix thoroughly with an electric mixer until the mortar forms a uniform and particle free paste. After mixing, let it stand for 2-3 minutes, and then perform a second slight mixing to make the mortar texture finer and the viscosity more moderate. Too thin mortar can lead to insufficient bonding strength and easy delamination; If it is too thick, it is difficult to apply evenly and may also cause cracking due to uneven distribution of internal moisture.
After mixing is completed, it enters the application process, with the core being to control the thickness and flatness. Apply the paste mortar evenly on the surface of the insulation board with a trowel, and the thickness should be precisely controlled at around 5 millimeters. This thickness can ensure sufficient contact between the mortar and the insulation board, form a strong bond, avoid virtual adhesion or gaps, and reserve space for the subsequent pressing of crack resistant materials. When applying, a ruler can be used for real-time calibration to ensure the overall smoothness of the mortar layer and avoid local over thickness or over thickness - local over thickness may cause cracks due to different drying shrinkage rates, while over thickness may not fully cover the insulation board, affecting the insulation and bonding effect.
The compaction and crack resistance treatment after application is the key to improving the durability of the wall. Immediately use insulation mortar board to compact the mortar layer as a whole, with even force, ensuring that there is no air interlayer between the mortar and insulation board, and thoroughly improving the bonding strength. Subsequently, according to the wall requirements, lay the alkali resistant mesh cloth or steel wire mesh flat on the mortar surface, and then gently press it into the mortar layer with a trowel to ensure that the mesh cloth/steel wire mesh is tightly adhered to the mortar. A 5-10 centimeter overlap width should be reserved at the edge to avoid gaps. Alkali resistant mesh fabric can meet the crack resistance requirements for ordinary exterior wall scenes, while steel wire mesh is recommended for high-rise and easily impacted areas to disperse the stress on the wall and effectively resist the risk of cracking caused by temperature changes and wall settlement.
The final step is the grinding treatment after solidification, laying the foundation for subsequent decoration. It is necessary to wait for the plaster mortar to fully cure, and the curing time needs to be adjusted according to the environment - it usually takes 24-48 hours under normal temperature (5-35 ℃) and good ventilation conditions, during which contact or rain should be avoided to prevent deformation of the mortar layer. After curing is completed, use a specialized insulation mortar scraper to grind the surface, smooth out the raised and rough areas, and make the surface of the mortar layer flat and consistent. A flat mortar layer can better adhere to subsequent decorative materials such as exterior wall coatings and bricks, avoiding hollowing and peeling of the decorative layer due to uneven surfaces.
As a manufacturer, it is important to remind everyone of several overlooked details: clean water must be used when mixing, as water containing impurities and oil stains can damage the composition of the mortar, affecting bonding and crack resistance; The construction environment temperature should be controlled between 5-35 ℃. Construction is prohibited on rainy or windy days, or when there is visible water on the wall. Low temperatures can delay curing, while high temperatures and strong winds can cause rapid dehydration and cracking of the mortar; Alkali resistant mesh cloth and steel wire mesh should be selected products that are compatible with the plastering mortar to avoid affecting the overall performance due to poor material compatibility. If you encounter any questions during construction, you can contact the manufacturer at any time for technical guidance to ensure that every step of the operation complies with the specifications.
There is no shortcut to the construction of exterior wall insulation plastering mortar. From mixing ratio to surface grinding, the rigor of each step directly affects the insulation effect, crack resistance, and service life of the exterior wall. Mastering the correct construction process can not only play the core role of plastering mortar, but also reduce maintenance costs in the later stage. As a professional manufacturer, we not only provide high-quality plastering mortar that meets standards, but also offer full process construction support to customers, helping them create durable and safe exterior wall insulation systems.
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