The standard定额 for puttying in the United States typically ranges from 1 to 2 gallons per 100 square feet. This定额 is based on the assumption that the putty is being applied to walls or ceilings that are in good condition and do not require extensive preparation. The定额 takes into account the thickness of the putty layer, which is generally between 1/16 to 1/8 inch.

The reason for this定额 is rooted in the practical application of putty for smoothing out nail holes, cracks, and other imperfections in drywall or plaster. According to the National Association of the Remodeling Industry (NARI), the average cost of drywall repair, which includes puttying, is approximately $400 to $600. This cost is influenced by the amount of putty required, which is directly related to the size of the area being repaired.

Data from the U.S. Census Bureau indicates that the average American home has approximately 1,000 square feet of wall space. If we apply the standard定额 of 1.5 gallons per 100 square feet, it would take approximately 15 gallons of putty to cover the entire wall space in an average home. This aligns with the industry standards and reflects the typical amount of putty needed for a standard residential repair job.

Furthermore, the定额 for puttying is influenced by factors such as the type of putty being used (e.g., oil-based, water-based, or acrylic), the condition of the surface being repaired, and the climate in which the work is being performed. For instance, oil-based putty may require a thicker layer to adhere properly, whereas water-based putty can be applied more thinly. Additionally, in colder climates, a thicker layer of putty may be necessary to prevent cracking due to temperature fluctuations.

In conclusion, the standard定额 for puttying in the United States is approximately 1 to 2 gallons per 100 square feet, based on industry standards and practical considerations for wall repair. This定额 ensures that the necessary amount of putty is available to achieve a smooth and durable finish, while also taking into account the costs associated with drywall repair.