I. Basic Introduction to Exterior Wall Moldings

Exterior wall moldings are prefabricated linear components used for exterior architectural decoration. Their primary function is to define the building’s façade silhouette, enhance its layering and design aesthetic, and they are widely employed in applications such as cornice moldings, belt courses, window surround moldings, door trim, column embellishments, and decorative pediments. Based on material, the mainstream product categories currently available on the market are classified into… EPS decorative moldings, GRC decorative moldings, PU decorative moldings Three types.

II. Common Specifications and Parameters

The specification parameters of exterior wall moldings vary significantly depending on the material; details are as follows:

1. EPS exterior wall moldings (currently the most popular choice for mass‑produced residential buildings)

• Dimension range: Projection of the cross-section from the wall (dimension extending beyond the wall): 20mm~500mm , Common specifications are 50 mm, 100 mm, 150 mm, and 200 mm; section width (width along the facade): 30mm~600mm ; The standard single‑rod factory‑length is 2000 mm, with a customizable length of 60.

Any length within 00 mm, with support for custom curved and irregular shapes.

• Performance parameters: EPS core density 18~22 kg/m³ ; The surface crack‑resistant protective layer has a thickness of 3–5 mm and is reinforced with an alkali‑resistant mesh fabric of ≥160 g/m². Its fire performance can meet the B1‑grade flame‑retardant standard.

2. GRC exterior wall moldings (suitable for large‑size, high‑end designs)

• Size range: Projection depth of the section from the wall surface 200mm~1200mm , customizable to larger sizes; standard single‑strand length 1200mm~3000mm , customizable extra-long components; the standard wall thickness of the components is 15mm~50mm , which can be adjusted according to the structural load.
• Performance parameters: Density of the substrate (glass-fiber-reinforced cement) 1800~2100 kg/m³ ; Flexural strength ≥ 12 MPa; Water absorption ≤ 10%; Can withstand 50 freeze–thaw cycles without cracking; Fire performance: Class A, non-combustible.

3. PU exterior wall moldings (suitable for light decorative applications)

• Size range: Section protrusion depth 10mm~200mm , The standard single‑piece length is 2,400 mm or 3,000 mm, and it can be cut on site as needed.
• Performance parameter: Density 400~450 kg/m³ , most are Class B1 flame-retardant, waterproof, and insect-proof.

III. Advantages of Exterior Wall Moldings

Comparison of the common advantages of traditional cast-in-place concrete and natural stone moldings:

1. High construction efficiency : Prefabricated in the factory and installed directly on site, eliminating the need for on-site formwork and concrete pouring. This reduces construction time by more than 50% compared to conventional methods, significantly lowering labor costs.

2. High design flexibility : Customizable to any line style, curvature, or intricate irregular shape, seamlessly adapting to all architectural styles, including European, New Chinese, and contemporary.

3. Stable performance : The finished product exhibits uniform prefabrication performance, resisting cracking, deformation, and mold growth when used outdoors, and can adapt to temperature fluctuations across diverse climates.

4. Great value for money : Costs 30%–70% less than natural stone and dry-hung stone, delivers a decorative finish comparable to high-end materials, and offers an excellent return on investment.

Unique advantages of different product categories:

✅ EPS moldings : Extremely lightweight (only 3–5 kg per square meter), it can be handled and installed by a single person, requires no pre‑embedded reinforcement, and is applied directly with adhesive; its cost is roughly one‑third that of GRC moldings. The core material itself is an insulating material, which helps to break thermal bridges and enhance the energy‑saving performance of exterior walls, making it the most widely used type in mass‑produced residential buildings.

✅ GRC moldings : High strength and excellent load-bearing capacity allow for large‑scale, substantial designs; its texture closely resembles natural stone, lending a more upscale aesthetic. It is ideally suited for façade cladding in high‑end villas and large commercial buildings, with a service life exceeding 50 years. Class A non‑combustible, it meets the fire‑safety requirements of public and high‑rise structures.

✅ PU moldings It can be sawn and nailed, offers flexible installation, features a fine, lifelike grain, and is resistant to insects and water. It’s ideal for small-scale decorative projects such as new home construction or exterior renovations of older homes, and can also be used to accentuate transitions between indoor and outdoor spaces.