The treatment of the gap between the double sliding door frame and the wall is crucial to ensuring its sealing, stability, and aesthetics. Improper treatment can easily lead to problems such as air leakage, water seepage, and noise intrusion, affecting the user experience. Targeted sealing techniques must be used for different gap sizes and wall conditions, combining material properties and construction details to achieve a long-lasting seal.
For small gaps, sealant can be used directly. Silicone sealant is a commonly used material for sealing double sliding doors due to its excellent weather resistance, aging resistance, and elasticity. During construction, first clean the gap of dust, oil, and loose particles to ensure the substrate is dry and clean. Fill the gap evenly with sealant and flatten it with a scraper or special tool to ensure a tight fit with the door frame and wall. After the sealant has cured, check the surface for flatness and make adjustments if necessary. This process is simple and suitable for gaps less than 5 mm wide, effectively preventing air and dust penetration.
If the gap width exceeds 5 mm, using sealant alone may cause cracking due to sealant shrinkage. In this case, it is necessary to combine it with a filler material to enhance the sealing effect. Polyurethane foam is the preferred material due to its strong expansion and dense filling properties. During construction, the foam is first sprayed evenly into the gaps. After it expands and cures, excess material is trimmed, and then sealant is applied to the surface. For particularly large gaps, a base layer of rock wool or expanding foam can be filled first, then covered with cement mortar and smoothed, and finally sealed with sealant. This process creates a composite sealing structure through multiple layers, significantly improving resistance to deformation.
For uneven gaps caused by uneven walls, the wall surface must be leveled first. Use a straightedge to check the verticality of the wall, grind down protruding parts, and repair recessed areas with cement mortar. After complete drying, remeasure the gap dimensions. If there is a deviation between the door frame size and the wall, it can be corrected by adjusting the door frame installation position or adding shims. For example, wooden or plastic shims can be embedded between the door frame and the wall to keep the door frame parallel to the wall before filling with sealant. This process requires the use of professional tools to ensure even stress distribution on the door frame and avoid deformation caused by localized stress concentration.
The sealing performance of a double sliding door is also closely related to the door frame structure design. High-quality door frames are typically equipped with specialized sealing strips, such as EPDM rubber strips or silicone sealing strips, whose softness and elasticity effectively fill the tiny gaps between the door frame and the wall. During installation, it is essential to ensure that the sealing strip fits tightly to the door frame without twisting or detachment. Some high-end double sliding doors employ a double-seal design, with sealing strips on both the inner and outer sides of the door frame, forming a double barrier to further enhance sound and heat insulation.
For humid environments or areas such as bathrooms and kitchens, moisture-proofing is crucial. Before filling the gaps with sealant, waterproof coatings can be applied or a moisture-proof membrane can be laid to prevent moisture penetration. If the wall is a lightweight partition or hollow brick, specialized expansion bolts should be used to secure the door frame to enhance structural stability. Regularly check the sealant condition after construction; promptly repair any aging or cracking to extend the seal's lifespan.
Customized sealing solutions are required for special scenarios. For example, curved walls require flexible sealing materials or bendable sealing strips; glass door frames require non-corrosive sealants; and high-temperature environments require high-temperature resistant silicone sealants. A site survey is necessary before construction to develop a specific plan based on the wall material, gap shape, and usage environment, ensuring both effective sealing and overall aesthetics.
The treatment of gaps between the double sliding door frame and the wall requires a comprehensive consideration of material selection, construction techniques, and environmental factors. Long-lasting sealing is achieved through layered filling, structural correction, and detailed optimization. From the meticulous application of the sealant to the scientific design of the door frame structure, every step must be strictly controlled to ensure that the double sliding door achieves ideal results in sound insulation, heat insulation, wind and dust protection, providing lasting protection for the space.
