Long-lasting thermal insulation
Thermal conductivity of about 0.028W/(m·K) gives high and stable thermal resistance over time; less insulation thickness is needed for the same result.
0yearsExperience producing insulation building materials (founded in 2000)
0+Employees on staff, including engineers and technical specialists
0million CNYAnnual gross output value
0certificatesManagement system certificates
About Yongguan
An insulation building materials plant with more than twenty years behind itCompany Profile
The company is located in the Airport Industrial Zone by the Jiaozhou Bay of Qingdao, Shandong Province. Founded in 2000, with Qingdao Baoli Xingsheng Foam Plant as its predecessor, it is a modern enterprise integrating the production and sales of XPS insulation boards, EPS foam boards, dry mortar, alkali-resistant fibreglass mesh and insulation anchor fasteners.
The company has a registered capital of 2 million CNY, total assets of 30 million CNY and an annual gross output of 60 million CNY. It employs 2 engineers, 4 assistant engineers and 10 technical specialists, with more than 80 staff in total. Its sales network covers Qingdao, Yantai, Weihai, Rizhao and other cities, and it is listed as a designated supplier by several large domestic developers.
- Registered capital
- 2 million CNY
- Total assets
- 30 million CNY
- Annual gross output
- 60 million CNY
- Production plants
- Chengyang · Laixi, two sites
2000Founded · Qingdao
Product Categories
Product lines covering main and ancillary insulation materials
The board range centres on XPS insulation boards and EPS foam boards, supported by dry mortar, fibreglass mesh and anchor fasteners. Everything ships from the same plant, which saves projects from sourcing from many suppliers.
01
XPS insulation board
Extruded Polystyrene Board
A rigid foam board with a continuous closed-cell structure, formed by melting polystyrene resin on a twin-screw extruder, injecting blowing agent and extruding the melt through a die. High compressive strength, low water absorption.
Thermal conductivity 0.028B1 / B2 class
02
Graphite XPS board
Graphite XPS Board
Graphite powder is added to the raw material and forms a lightweight protective layer on the surfaces of the interconnected cell walls, lowering heat transfer and improving board strength and dimensional stability.
Silver-grey colour separationHigh energy-saving standards
03
EPS foam board
EPS Board
A white board moulded in blocks by steam-heating pre-expanded expandable polystyrene beads in a mould. Fine closed-cell structure; light, easy to cut and easy to shape.
Walls / roofsComposite boards
04
Underfloor heating insulation board · Reflective film
Floor Heating Insulation
A fire-retardant foam board bonded with eco-friendly laminating adhesive and reflective film over 50g/m² non-woven fabric. It blocks heat transfer into the floor slab and keeps heat flowing upward into the room only.
With reflective filmSound insulation
05
Ancillary building materials
Ancillary Materials
Dry mortar, alkali-resistant fibreglass mesh, insulation anchor fasteners, polystyrene granules, redispersible powder, vitrified hollow microspheres and putty, supplied from the same plant as the insulation boards.
Mortar / meshAnchor fasteners
06
Board selection by application
Selection Guide
External walls, roofs, underfloor heating, cold stores, garage roof slabs and road subgrades have different requirements for thickness, compressive strength and fire class. Locate the right model by where it is used.
Selection comparison table
Why XPS
Six long-term properties from an independent closed-cell structure
Polystyrene itself has low thermal conductivity. After extrusion foaming it forms a compact honeycomb closed-cell structure that blocks heat transfer more effectively, which is why XPS boards keep stable insulation performance under damp, low-temperature and high-load conditions.
Superior waterproof and damp-proof performance
The closed-cell structure is dense and the board faces are seamless; the polystyrene molecules themselves do not absorb water, so water absorption is low and the vapour barrier works well.
High compressive strength · Stable load bearing
Compressive strength typically covers 150–700 kPa, suitable for car-park decks, floor levelling layers and low-temperature storage floors and other high-load positions.
Corrosion resistant · Highly age resistant
Ordinary rigid foam insulation tends to age, absorb water and lose performance after a few years; XPS boards keep their performance even under high vapour pressure, with a service life of up to 30–40 years.
Light weight · Easy to install
Boards can be cut with a utility knife or hot wire and fit easily against wall and roof substrates, reducing on-site wet work and construction time.
Fire performance class to order
B1 class (flame-retardant), B2 class and standard boards are supplied per project requirements; B1 class is recommended for high-rise and public buildings.
Specification
Common sizes at a glance
| Board thickness | 20 / 30 / 40 / 50 / 60 / 80 / 100 mm |
|---|---|
| Standard sizes | 1200×600 · 1800×600 mm (customised on request) |
| Edge type | Plain edge / tongue-and-groove edge |
| Thermal conductivity | ≈0.028 W/(m·K) |
| Compressive strength | 150–700 kPa |
| Fire performance | Class B1 / class B2 / standard type |
| Colour | Natural (light yellow-green), blue, grey (graphite) and others, by batch |
These are common supply sizes and performance ranges, for selection reference only; specific values follow the national standard GB/T 10801.2 and the company's factory inspection reports.
Manufacturing
Eight steps from raw material to finished board
Raw material batching
Polystyrene resin with flame retardant, colour masterbatch and other additives is metered to the formula.
Twin-screw extrusion
The screws heat and melt the mix while blowing agent is injected at the same time to form a uniform melt.
Die extrusion and foaming
Through the die head the melt is extruded as a continuous closed-cell rigid foam slab stock.
Cooling and setting
Pulling and cooling bring the board thickness and flatness to a stable state.
Length / width cutting
Cut to the ordered sizes, with plain or tongue-and-groove edges as options.
Ageing storage
Finished stacks rest in place so internal stress releases and dimensions stabilise further.
Factory inspection
Density, thickness, compressive strength and fire performance are checked against factory specifications.
Packing and dispatch
Wrapped in stretch film, then loaded by project batch and delivered to site.
Applications
Cost-effective insulation and damp-proofing with sound quality for buildings
XPS boards are widely used for damp-proofing and insulation in dry wall insulation, flat concrete roofs and steel-structure roofs, low-temperature storage floors, under radiant floor heating pipes, car-park decks, airport runways and expressways, and are used to control frost heave of the ground.
01
External walls and dry wall insulation
External wall insulation on cast-in-place concrete and masonry walls, reducing thermal bridges
02
Roofs and steel-structure roofs
Insulation and thermal protection for flat concrete roofs and metal roofs
03
Low-temperature radiant floor heating
Insulation under the heating pipes, with heat directed upward into the room only
04
Cold stores and low-temperature storage
Damp-proof insulation for low-temperature storage floors and walls
05
Car-park decks and floor levelling layers
Damp-proof insulation for high-load floors and underground garage roof slabs
06
Municipal works and road subgrades
Frost-heave and damp protection for airport runways and expressways
Manufacturing Shop
Production workshop, photographed on site
Workshops equipped with the extrusion main line, in-line cutting and stacking equipment, plus finished-goods yards at both plants.
Certificates
Three management system certificates, viewable in Chinese and English
The certification scope in each case is management activities related to polystyrene foam (XPS) production. The certificates were issued by the certification body in August 2026 and are valid until 30 August 2029. Originals can be verified on the website of the Certification and Accreditation Administration of China (CNCA).
GB/T 19001-2016 idt ISO 9001:2015
Quality Management System Certificate
- Certificate no.
- 62726Q00993R001
- Certification scope
- Production of polystyrene foam (XPS)
- Valid until
- 2029-08-30
GB/T 24001-2016 idt ISO 14001:2015
Environmental Management System Certificate
- Certificate no.
- 62726E00648R001
- Certification scope
- Environmental management activities related to production of polystyrene foam (XPS)
- Valid until
- 2029-08-30
GB/T 45001-2020 idt ISO 45001:2018
Occupational Health and Safety Management System Certificate
- Certificate no.
- 62726S00579R001
- Certification scope
- Occupational health and safety management activities related to production of polystyrene foam (XPS)
- Valid until
- 2029-08-30
Sales Network
Sales network covering the major cities of Shandong
Products and services cover Qingdao, Yantai, Weihai, Rizhao and other cities, and the company is listed as a designated supplier by large domestic developers.
QingdaoChengyang · Licang · Jimo
YantaiDevelopment Zone · Zhifu
WeihaiHuancui · Economic Zone
RizhaoDonggang · Lanshan
Partner developers and general contractors (compiled from company promotional materials): Hisense Real Estate · Baitong Real Estate · Qingjian Group · Baoli Real Estate · Greentown Real Estate
News & Insight
Industry news and company updates
182026.09
Industry news
Domestic XPS market at about 28.7 billion CNY in 2025, up 9.4% year on year
According to the China Extruded Polystyrene (XPS) Market Research Report (2025–2026), domestic XPS output reached 3.8 million tonnes in 2025 with a capacity utilisation rate of 90.5%; the market size is expected to exceed 31 billion CNY in 2026.
Read more052026.09
Industry news
Penetration of B1 class fire-retardant XPS boards rises to 53.7%, structural shortage in high-end products
The report notes that the nationwide penetration of B1 class fire-retardant XPS reached 53.7% in 2025 and is expected to rise to 61.2% in 2026; low-end standard boards face intense homogeneous competition, while compliant high-end capacity has become the core of competition.
Read more312026.08
Company news
Company obtains the three certificates for quality, environment and occupational health and safety management systems
The certification scope of all three certificates is production of polystyrene foam (XPS). They were issued on 2026-08-31 and are valid until 2029-08-30; the Chinese and English certificates are now available to view on this site.
View certificates122026.08
Technical Q&A
How to choose the thickness of XPS boards for external wall insulation?
For the same thermal resistance requirement, XPS boards with a thermal conductivity of 0.028W/(m·K) can be noticeably thinner than ordinary insulation materials; the article gives selection ranges of 30–80 mm and points to watch for common positions.
Read more