After the stone floor was laid, extensive hollow areas appeared (tapping sound indicates more than 20% of the area), affecting service life.
In decoration engineering, the correct selection of materials and scientific construction techniques are the foundation for ensuring quality. Material problems such as color difference, warping, and contamination, and process defects such as bulging, cracking, and detachment are the most common quality issues. Each chapter of GB 50210-2018 specifies material incoming inspection, construction techniques, and quality acceptance. GB 50325-2020 sets requirements for the environmental performance of materials. GB 18580-2017 specifies formaldehyde limits for wood-based panels.
In stone engineering, commonly used marble is suitable for interiors, granite for both interiors and exteriors, sandstone has strong decorative appeal, and artificial stone is mainly used for countertops. Stone thickness shall be no less than 20mm for floors and no less than 20mm for walls. Surface treatment is divided into four types: polished, matte, flamed, and bush-hammered. Common problems include efflorescence (alkaline substances in cement migrating to the surface with water), color difference (different batches from different quarries), and cracks (natural cracks or improper handling).
Tile engineering is classified into polished tiles with water absorption no more than 0.5%, glazed tiles with water absorption of 3% to 10%, full-body tiles, and rustic tiles. For installation, the thin-set method with tile adhesive is recommended, with a thickness of 3 to 5mm and high bonding strength. Tile joints: 2 to 3mm for ordinary tiles, 3 to 5mm for rustic tiles, controlled using cross spacers. Common problems include hollowing (judged by tapping sound), cracking (substrate deformation or tile stress), and detachment (adhesive aging).
Woodwork engineering requires wood moisture content no more than 12% for interiors. Wood flooring is divided into three types: solid wood, engineered, and laminate. Common problems include deformation (moisture content changes), cracking (temperature and humidity changes), mold (damp environment), and fading (UV exposure). Coating engineering is divided into latex paint with VOC no more than 50 g/L, art paint, and inorganic paint with Class A fire resistance. The construction process is substrate treatment, 2 to 3 coats of putty, 1 coat of primer, and 2 coats of topcoat.
In ceiling engineering, gypsum board is divided into three types: standard, moisture-resistant, and fire-resistant, with a thickness of 9.5mm or 12mm. For light steel keels, the main keel spacing shall not exceed 900mm and the secondary keel spacing shall not exceed 400mm. Common problems include cracking and sagging (excessive hanger spacing or damp gypsum board). Glass engineering uses tempered glass and laminated glass; partitions use 8 to 12mm, and railings use no less than 12mm tempered laminated glass.
Engineering experience requires incoming inspection of all materials on site: specifications, colors, and factory test reports. Materials for the same space shall be purchased in the same batch to avoid color difference. Closure details shall be designed at junctions between different materials, such as copper strips for the junction between stone and carpet. Materials shall be stored according to the manufacturer's instructions with correct temperature, humidity, flat or upright placement. During construction, finished product protection shall be well implemented, especially for stone, woodwork, and glass.
Material and process quality control is the foundation for the success of hotel fine decoration engineering. On-site material management should establish an incoming inspection ledger, recording the material type, specification, quantity, batch, and inspection results. After stone arrives on site, six-sided waterproof protection treatment should be carried out immediately to prevent efflorescence. Before tile installation, pre-layout should be carried out; wall and floor tile joint alignment should be checked by overlay to determine the joint size, then controlled using cross spacers. Before wood veneer installation, the substrate moisture content should be tested and confirmed to be less than 8% before construction. During coating construction, the ambient temperature should be maintained between 5 and 35°C with humidity no more than 85%, and sufficient drying time should be allowed between each process. Closure at junctions between different materials is the embodiment of fine decoration quality; transition pieces or process joints should be designed at the junction between stone and wood veneer, and sealing gaskets should be used at the junction between metal and glass. Finished product protection is a link that is easily overlooked in decoration engineering management but has significant impact; after stone laying, protective film or gypsum board should be covered, and after woodwork installation, protective film should be wrapped to avoid damage and contamination from subsequent construction. Environmental performance test reports of materials should be archived and kept, especially the formaldehyde emission test reports of wood materials and the VOC content test reports of coatings must be complete.
Prevention of stone hollowing problems requires strict control in three links: substrate treatment, installation process, and curing management. In the substrate treatment link, before installation, the floating dust, oil stains, and loose layers on the substrate surface should be thoroughly cleaned, and the substrate moisture content should be controlled below 3%. For uneven substrates, leveling treatment should be carried out first, with a leveling layer thickness of no less than 20mm. In the installation process link, the thin-set method should be used for construction; tile adhesive should be mixed thoroughly according to the ratio in the product instructions, left to stand for 5 minutes, and then mixed again. During stone installation, a rubber mallet should be used to tap gently to ensure full contact between the stone and the substrate; the tapping force should be uniform to avoid damaging the stone. After stone laying, a spirit level should be used promptly to check flatness, with deviation controlled within 2mm. In the curing management link, after stone installation is completed, covering protection should be carried out within 24 hours; during the curing period, foot traffic and stacking of heavy objects are strictly prohibited. The curing time shall be no less than 48 hours, extended to 72 hours in low winter temperatures. Hollowing detection should be carried out after curing is completed, using a hollowing hammer to tap and inspect piece by piece; those with hollowing area exceeding 15% shall be reworked. Through strict construction control and standardized curing management, ensure stone installation quality and avoid hollowing problems.
Prevention of stone hollowing problems requires strict control in three links: substrate treatment, installation process, and curing management. In the substrate treatment link, before installation, the floating dust, oil stains, and loose layers on the substrate surface should be thoroughly cleaned, and the substrate moisture content should be controlled below 3%. For uneven substrates, leveling treatment should be carried out first, with a leveling layer thickness of no less than 20mm. In the installation process link, the thin-set method should be used for construction; tile adhesive should be mixed thoroughly according to the ratio in the product instructions, left to stand for 5 minutes, and then mixed again. During stone installation, a rubber mallet should be used to tap gently to ensure full contact between the stone and the substrate; the tapping force should be uniform to avoid damaging the stone. After stone laying, a spirit level should be used promptly to check flatness, with deviation controlled within 2mm. In the curing management link, after stone installation is completed, covering protection should be carried out within 24 hours; during the curing period, foot traffic and stacking of heavy objects are strictly prohibited. The curing time shall be no less than 48 hours, extended to 72 hours in low winter temperatures. Hollowing detection should be carried out after curing is completed, using a hollowing hammer to tap and inspect piece by piece; those with hollowing area exceeding 15% shall be reworked. Through strict construction control and standardized curing management, ensure stone installation quality and avoid hollowing problems. Repair of stone hollowing should adopt different repair schemes according to the degree of hollowing. For hollowing areas between 5% and 15%, the grouting repair method can be used, drilling holes at the hollowing locations and injecting epoxy resin or cement slurry to fill the hollow voids. The grouting pressure should be controlled between 0.2 and 0.4MPa, and the grouting speed should not be too fast to avoid stone cracking. After grouting is completed, use heavy objects to press the stone surface and keep for 24 hours to ensure full curing of the slurry. For hollowing areas exceeding 15% or where grouting repair is ineffective, the stone should be removed and re-installed. When removing, use professional tools to avoid damaging the surrounding intact stone; substrate treatment for re-installation should follow standard construction techniques. Acceptance after hollowing repair should use a hollowing hammer to tap and check the repair effect; the hollowing area in the repaired region should not exceed 5%. Hollowing repair records should include the hollowing location, area, repair method, and repair results, and be archived as engineering records for future reference. Through timely detection and standardized repair, ensure the long-term stability and safety of stone installation.
Hollowing repairs in stone should adopt different repair schemes according to the degree of hollowing. For hollowing areas between 5% and 15%, the grouting repair method may be used, drilling holes at the hollowed locations and injecting epoxy resin or cement grout to fill the hollow voids. The grouting pressure should be controlled between 0.2 and 0.4 MPa, and the grouting speed should not be too fast to avoid cracking the stone. After grouting is completed, use heavy objects to press on the stone surface and keep for 24 hours to ensure the grout fully cures. Where the hollowing area exceeds 15% or grouting repair is ineffective, the stone should be removed and re-laid. During removal, use professional tools to avoid damaging the surrounding intact stone. Acceptance after hollowing repair should use a hollowing hammer to tap and check the repair effect; the hollowing area in the repaired region should not exceed 5%. The closing treatment at the junctions between stone flooring and other materials is an important part of hollowing prevention. The junction between stone and carpet should use brass strips or stainless steel strips for closing, and the closing strips should be fixed to the base layer. The junction between stone and wooden flooring should use T-shaped closing strips, and the height of the closing strips should match the thickness of the stone and wooden flooring. Reinforcement treatment of stone edges is also an important measure to prevent hollowing; back glue should be applied to stone edges to enhance bonding strength. In frequently trodden areas such as doorways and passages, the quality control of stone flooring laying should be strengthened to ensure no hollowing occurs at edges and corners. Through meticulous closing treatment and edge reinforcement, the occurrence of stone hollowing problems is effectively prevented.
The closing treatment at the junctions between stone flooring and other materials is an important part of hollowing prevention. The junction between stone and carpet should use brass strips or stainless steel strips for closing, and the closing strips should be fixed to the base layer; a 5 mm gap should be left between the stone edge and the closing strip and filled with sealant. The junction between stone and wooden flooring should use T-shaped closing strips, with height matching the thickness of the stone and wooden flooring. The junction between stone and floor tiles should be directly tightly joined or closed with brass strips. Reinforcement treatment of stone edges is also an important measure to prevent hollowing; back glue should be applied to stone edges to enhance bonding strength. In frequently trodden areas such as doorways and passages, the quality control of stone flooring laying should be strengthened to ensure no hollowing occurs at edges and corners. Where the hollowing area exceeds 15% or grouting repair is ineffective, the stone should be removed and re-laid. Through meticulous closing treatment, edge reinforcement and timely hollowing repair, the occurrence of stone hollowing problems is effectively prevented, ensuring the long-term stability and safety of stone laying.
Prevention of stone hollowing is controlled through three stages: base layer treatment, laying workmanship and curing management. After the base layer is cleaned, it should be fully wetted but without standing water. Use low-alkali cement or dedicated stone adhesive for laying to reduce the formation of free alkali. After stone laying, cover with plastic film and cure for no less than 7 days. For routine cleaning, use neutral cleaners; do not use cleaners with high acidity or alkalinity. Reapply protective agent to the stone surface every six months to maintain the protective effect. Through systematic prevention and timely repair, the long-term stability and safety of stone laying are ensured. Although stone hollowing problems are common, they can be effectively controlled through standardized construction and maintenance, ensuring the decorative effect and service life of the floor.