Preparation Work Before Tile Adhesive Construction

Preparation work before tile adhesive construction is a core prerequisite to ensure firm, flat and durable tile installation, as well as to improve overall construction quality and efficiency. Adequate and standardized pre-construction preparation can effectively avoid common quality hazards such as hollowing, detachment, cracking and warping, reduce rework costs and extend the service life of the finish. The systematic and complete pre-construction preparation process and technical key points are as follows:

The base course is the stress foundation for tile installation; its firmness, flatness and cleanliness directly determine the bonding effect and must be treated strictly.

Completely remove oil stains, release agents, dust, laitance, loose particles and debris from the base surface to avoid impairing bonding strength.

For old walls and floors, peel off blistered, detached, powdered coatings, putty, latex paint and hollowed mortar layers until a solid structural layer is exposed.

For smooth concrete or stone surfaces, broom finishing or chiseling can be applied to enhance interface bonding.

Use a straightedge and level to check the flatness and verticality of the base course; areas with excessive deviation shall be repaired with special leveling mortar.

Fill cracks, holes, honeycombs and pits with repair mortar to ensure a defect-free surface.

Focus on inspecting hollowing, looseness, dusting and powdering; unqualified base courses must be strengthened or removed and rebuilt, and direct tiling on weak bases is prohibited.

For high-water-absorption bases (such as aerated concrete, red bricks, cement mortar surfaces) or high-temperature dry environments, sprinkle water 2–4 hours in advance until the surface is moist but free of standing water.

Let the surface dry to a slightly damp state before construction; construction on waterlogged or over-wet bases is strictly prohibited to avoid reducing the strength of tile adhesive.

Material selection and quality control are critical to ensuring bonding strength and durability.

Match tile adhesive according to tile type: for large-size tiles, thin tiles, vitrified tiles, marble and other low-water-absorption materials, select high-strength, heavy-duty or flexible tile adhesive; standard ceramic tiles may use standard tile adhesive.

Select according to application environment: for wet areas such as bathrooms, balconies and exterior walls, prefer waterproof tile adhesive; for low-temperature environments, select low-temperature-resistant products.

Ensure tile adhesive complies with national standards such as GB/T 25181 and has qualified inspection reports.

Check that product packaging is intact, sealed and undamaged with clear labels; verify product name, model, production date, shelf life and implementation standard.

Confirm consistency between products and construction scheme; expired, caked or damp-deteriorated tile adhesive is prohibited.

Prepare required tools as per construction needs: notched trowel (with appropriate notch spacing according to tile type), electric mixer, mixing bucket, water bucket, rubber mallet, trowel, level, plumb bob, masking tape, cleaning cloth, etc.

Tool conditions directly affect construction uniformity and efficiency and must be inspected and adjusted in advance.

Check that the notched trowel has intact, undeformed and unworn teeth with notch spacing meeting thickness requirements.

Test that the electric mixer runs normally with stable speed and undamaged power cords.

Verify the accuracy of rubber mallets, levels, straightedges and other tools.

Arrange material storage, mixing and construction areas reasonably to keep passages clear for easy access and operation.

Protect materials from sun, rain and moisture; keep mixing areas away from finished areas to reduce contamination.

Standardize construction behavior, unify quality standards and avoid human errors.

Before construction, the technical director shall provide written and oral disclosure to the construction team, clarifying construction technology, mixing ratio, spreading method, open time, compaction requirements and acceptance standards.

Specify schedule milestones, safety precautions and finished product protection requirements.

Provide on-site training for new and transferred workers on key operations such as mixing, adhesive spreading, tile placement, leveling and air evacuation.

Strengthen quality awareness, emphasizing core requirements such as thin-bed method, full mortar coverage and hollowing control.

Normal curing of tile adhesive requires suitable environmental and safety conditions.

The recommended construction temperature is 5℃ to 35℃. Low temperatures slow curing and risk freezing; high temperatures accelerate water loss and impair bonding.

Maintain suitable ambient humidity; outdoor construction in heavy rain, dense fog or strong wind is prohibited.

Maintain moderate ventilation in the construction area to accelerate moisture evaporation and adhesive curing, but avoid strong direct wind that causes rapid surface skinning.

Workers shall wear gloves, masks, goggles and other protective equipment.

Set up warning signs on site, ensure electrical safety, fire and slip prevention, and restrict access by unauthorized personnel.

Protect surrounding finished products to avoid contamination of doors, windows, floors and completed parts.