The "Blanket Laying Method" for Rolled Materials: This construction method involves bonding the rolled materials only within a certain perimeter to the subgrade, with the remaining area left unbonded.

This construction method has low requirements for the foundation and saves time on the project schedule.

Advantages of the "loose laying" method for rolled materials construction:

(1) Enhanced Stretchability Boosts Waterproofing Construction Quality: Full-adhesive waterproofing layers often suffer from limited elongation and are prone to tearing. Solutions include increasing the elongation rate of rolls, reducing structural deformation, and altering the bonding process of waterproofing membranes. Among these, modifying the bonding process is cost-effective, easy to implement, and technically simple. By adopting the "bare laying" method, which allows the waterproofing layer to be as detached from the base layer as possible, the layer can have sufficient length to participate in deformation, providing a good buffer against tearing. This prevents water leakage caused by various deformations and shrinkages.

(2) By employing the "dry-lay method," direct contact between the waterproof membrane and the base is significantly reduced, allowing for construction on uneven or uniformly moist substrates without leveling. Dry-laying on the concrete base requires no primer treatment, thus saving considerable time. Generally, the dry-lay method is about 30% more efficient than the full-adhesive method. Consequently, the dry-lay method for waterproof membranes undoubtedly plays a positive role in reducing engineering costs.

(3) Seasonal Construction Advantages a. Due to the low requirement for subgrade conditions in the open-laying method, construction can be carried out after heavy rain by simply clearing the surface water from the subgrade. Therefore, the construction advantage of waterproofing projects is greater during the rainy season. b. If construction is carried out under sub-zero temperatures in winter, traditional techniques require covering and maintaining the subgrade, and the adhesion of materials is significantly affected by temperature. However, the open-laying method can avoid these issues, and the winter construction advantage is also quite evident.

(4) Safety and Environmental Protection: The blank-laying construction method requires no primer and minimizes the use of open flame. The joints of the rolled materials are self-adhesive, eliminating the need for purchasing and storing large amounts of volatile solvents. This method ensures safety, environmental friendliness, and energy conservation. Consequently, BAC rolled materials effectively eliminate various environmental pollution factors and fire hazards in blank-laying construction, boasting excellent safety and environmental benefits.