BY Slurry-Composite Insulation Board Exterior Wall Fireproof Insulation System (Type III Panel of System A)
An exterior wall fire‑protective insulation system featuring a fire‑resistant barrier structure, composed of BY insulation boards, fixing materials (such as adhesive mortar and anchor bolts), a mortar‑based fire‑proof leveling layer, a finishing plaster layer, and a decorative finish layer. Type III boards are insulation panels manufactured from molded polystyrene foam, with one side grooved during production.
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Exterior wall insulation system
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BY Slurry-Composite Insulation Board Exterior Wall Fireproof Insulation System (Type III Panel of System A)
An exterior wall fire‑protective insulation system featuring a fire‑resistant barrier, composed of BY insulation boards, fixing materials (such as adhesive mortar and anchor bolts), a mortar‑based fire‑proof leveling layer, a finishing plaster layer, and a decorative finish layer. Type III boards are insulation panels manufactured from molded polystyrene foam, with one side grooved during the production process.
Performance Metrics
| Project | Unit | Performance Metrics | |
| Weather resistance | Appearance | — | No visible cracks; no chalking, hollowing, or flaking. |
| System tensile bond strength | MPa | A system ≥0.10 | |
| Impact resistance | Second floor and above | — | Class 3J |
| First floor | — | Level 10J | |
| Water absorption (24 h) | g/m² | ≤500 | |
| Frost resistance | Appearance | — | After 30 freeze–thaw cycles, the system exhibits no visible cracks, powdering, delamination, or spalling. |
| System tensile bond strength | MPa | A system ≥0.10 | |
| Waterproofness of the finishing layer | — | No water penetration on the inner side of the finishing layer. | |
| Water vapor moisture flux density | g/(m²·h) | ≥0.85 | |
Scope of Application
It is used as an insulation layer in residential buildings, public buildings, commercial buildings, and for energy‑saving retrofits of existing structures.
Product Advantages
I. Saving Money
The base layer does not require plastering (costing approximately RMB 20 per m²), nor is it necessary to install fire-rated windows with a fire resistance rating exceeding 0.5 hours. Based on current market prices in Linyi, fire-resistant windows cost RMB 650 per m², while standard windows cost RMB 450 per m², resulting in a price difference of RMB 200 per m². With a window-to-wall ratio of 1:3 as adopted in contemporary residential designs, the additional cost amounts to RMB 66 per m². Furthermore, there is no need to design fire‑break zones, which typically cost about RMB 130 per m². Additionally, the exterior wall substrate does not require an extra two coats of waterproofing—waterproof coating costs roughly RMB 18 per m², and waterproof cement mortar about RMB 25 per m²—yielding savings of approximately RMB 50 to RMB 150 per m².
II. Space Savings
According to the calculation rules for gross floor area in the “General Code for Civil Buildings,” area is measured up to the finish layer. Taking a 100,000-square-meter residential community as an example, reducing the exterior wall insulation thickness by 10 mm can save 600–800 square meters of usable interior space. Under the same energy‑saving standards, this system, when equipped with the same core material, is 3 cm thinner than other systems, thereby increasing the net floor area. In the expansion project of the West Campus of Linyi No. 4 Middle School, with a total floor area of 85,000 square meters, adopting this system reduced the exterior wall insulation thickness by 30 mm compared to rock wool, resulting in an increase of 1,530–2,040 square meters of usable interior space.
III. Reduction of Construction Period
After implementing this system, the construction process incorporates two layers of waterproofing—one rigid and one flexible—eliminating the need for mortar plastering to level the exterior wall substrate and saving the investor and general contractor approximately one month of construction time.
IV. Durable and Reliable
Layer-by-layer gradient and flexible crack resistance: From the insulation layer to the finish coat, the elastic modulus transitions gradually across each layer, effectively eliminating cracking in the exterior insulation system.
Cavity-free construction: eliminates wind pressure—particularly negative wind pressure—from damaging the insulation layer of high-rise buildings, providing more reliable resistance to wind and seismic forces. It requires no maintenance throughout its service life and has a lifespan equal to that of the building’s structural system.
Instructions for Use
Base wall preparation → Layout of reference lines → Installation of support brackets → Preparation of bonding mortar → Construction of the bonding and leveling layer using bonding mortar → Application of Type III boards, with joints filled to a width of 10–15 mm using bonding mortar → Anchoring with expansion bolts → Construction of a 12–15 mm thick fire‑resistant leveling layer of mortar → Preparation of crack‑resistant mortar → Application of the first coat of crack‑resistant mortar, embedding the fiberglass mesh → Application of the second coat of crack‑resistant mortar → Finishing layer construction.
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Address: No.17 Kunming Road, Economic Development Zone, Linyi City, Shandong Province
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