60% Shorter Construction Period: How Hangzhou Qingshanhu Villa Community Completed Exterior Renovation with LONGTE PU Stone

1.Project Background: For Old Exterior Renovation, Time Is the Most Expensive Cost

   Built in 2010, Qingshanhu Villa Community originally adopted natural mushroom stone (warm sandstone color) for its exterior walls. After more than ten years, the stone has experienced water seepage, moss growth, and local cracking and falling off. Every plum rain season, the interior walls of many households become moldy, leading to a continuous stream of property maintenance work orders.

The property company has been planning the renovation since the end of 2024 but hesitated to start—for a simple reason: time is unaffordable.

   If natural stone is used, the entire process is as follows: structural inspection (7 days) → design of reinforcement plan (10 days) → demolition of old stone (10 days) → wall reinforcement construction (15 days) → waiting for new stone processing (30 days) → dry-hanging installation (20 days). It adds up to nearly three months. With 180 households living normally in the community, scaffolding will be erected everywhere for three months, bringing noise, dust, and safety hazards. Mr. Zhang, the property manager, said: "I can't sleep just thinking about it. We are not short of money, but short of time. The owners can't wait, complaints can't wait, and the plum rain season can't wait."

2.Client Challenges: Three "Time Bottlenecks"

   The reason why natural stone projects are lengthy is that there are three unavoidable "time bottlenecks":

The three are superimposed, and none can be bypassed. What the property company needs is not "cheaper materials," but a solution that "can turn three months into three weeks."

3.Product Selection: LONGTE PU Stone H004 Mushroom Stone Series

After comparing 7 alternative solutions, the property company finally chose PU Stone from Haining Longtime. The reason is only one: it can directly cover the old wall without any pre-processes.

[Products Used] LONGTE PU Stone H004 Series, 850 square meters, exterior facades of 18 villas.

4.Time Comparison: PU Stone vs Natural Stone (850㎡ Project)

Conclusion: PU Stone compresses a three-month natural stone project to less than three weeks.

5.Why Can PU Stone Be So Fast? — Four Key Differences

• Difference 1: No need to "wait for stones"

The supply of natural stone is limited by mine mining and processing schedules, while PU Stone is produced by molds, with standard textures and colors in stock all year round. Urgent orders can even be shipped in batches, with delivery while construction is in progress.

• Difference 2: No need to "wait for reinforcement"

The self-weight of natural stone is 50–80kg per square meter, forcing many projects to first carry out wall reinforcement. PU Stone only weighs 3–6kg per square meter, which can be directly borne by ordinary walls, eliminating the reinforcement link.

• Difference 3: No need to "wait for professional workers"

The installation of natural stone requires professional stonemasons, who are increasingly difficult to find. PU Stone can be installed by ordinary decorators; carpenters and masons can get started after half a day of training.

• Difference 4: No need to "wait for drying"

Cement mortar leveling requires curing time, while PU Stone is fixed with structural adhesive + screws, and the adhesive curing time is only 24 hours, which is not affected by the weather. Rainy days? Construction as usual.

6.Implementation Process: How Longtime Helps Clients "Save Time"

6.1 Early Stage: Quickly Eliminate Doubts, No Waiting or Delay

The property company was initially worried about the poor effect of "simulated stone." Longtime delivered the samples to Hangzhouwithin 48 hours and attached videos of completed similar projects overseas. After on-site comparison by the owners' committee, the contract was signed on the 3rd day.

"Other suppliers take a week to send samples, but Longtime arrives the next day. We trust this efficiency." — Property Manager

6.2 Before Construction: Zero-Wait Technical Preparation

Survey and layout in one day: Longtime technicians went to the site with laser scanners, completed the exterior data collection of 18 villas in half a day, and sent the layout to the factory that night.

Pre-numbered, install upon arrival: All panels are numbered by building and wall position in the factory, so there is no need to select or align textures on site. Directly installed on the wall on the day of delivery.

Half-day training for construction teams: Longtime demonstrated cutting, gluing, and screwing on site. The construction team got started in half a day and worked independently the next day.

6.3 During Construction: Minute-by-Minute Cooperation

Batch shipping, delivery while installation: Longtime divided 850㎡ into 5 batches, each corresponding to 2-3 buildings. As soon as the construction team finished one building, the next batch of goods arrived just in time. Zero waiting, zero downtime.

On-site technician: One Longtime technician was stationed at the construction site for 14 days, arriving at 7 a.m. every day to check the installation quality of the previous day and answer questions of the day. Any questions from the construction team were answered within 10 minutes.

Construction continues on rainy days: PU Stone is fixed with structural adhesive, which is not afraid of moisture. It rained for two days during the construction in Hangzhou; other construction sites stopped work, but here construction continued as usual.

6.4 Result: Delivered One Month in Advance

The original plan was 25 days, but actually completed all 850㎡ in 17 days. 73 days were saved compared with the natural stone solution. The property manager said: "We originally promised the owners to complete the project before May Day, but we finished it before Qingming Festival. The owners' group was full of praise."

7.Why Will "Speed" Become the Top Demand in 2026?

• Labor costs are getting higher and higher: The daily wage of professional stonemasons has risen to 800–1200 yuan, and they are becoming fewer and fewer.
• Commercial rents are getting higher and higher: Each extra day of construction period means an extra day of loss. Stores and hotels are all racing against time.
• Policies on construction disturbance are becoming stricter: Many cities prohibit long-term road occupation for construction. Renovation projects that can be completed within two weeks are easier to approve.

PU Stone is just in line with this rhythm: it uses industrial production methods to solve the inherent "slowness" of natural stone.

8.Testing & Certification

About Us

Haining Longtime Industry Co., Ltd has focused on PU Stone export since 2015, serving the European, North American, Australian, and Middle Eastern markets.

Supports OEM / ODM, customizable texture, color, size, and back groove.

For samples, quotations, or technical specifications, please contact:

• Haining Longtime Industry Co., Ltd
• Official Website: http://www.ltpvcfactory.com
• WhatsApp: +86 17757302351
• Email: [email protected]
• Sample Policy: Free samples, catalogs, and buckle demonstration parts are provided; freight collect.