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What Thickness of Sandwich Panel Is Best for Your Project?

What Thickness of Sandwich Panel Is Best for Your Project?

February 23, 2026

Currently, common sandwich panel include EPS sandwich panel, PU/PIR sandwich panel and rock wool sandwich panel.

 

Generally speaking, the thicker the sandwich panel, the better the insulation effect. PU/PIR has the best thermal insulation performance, rock wool has the best fire resistance, and EPS has the highest cost performancebut no fireproof.

 

Due to the different properties of the core material, the application of sandwich panels with different core materials is also different, as detailed below.

 

Thickness

EPS Sandwich Panel

PU/PIR Sandwich Panel

Rock wool Sandwich panel

50mm

Suitable for interior wall partitions in ordinary workshops and factories where insulation requirements are not high, as well as prefabricated houses, temporary houses, temporary buildings on construction sites, and general storage.

Suitable for roofs and walls of warehouses at normal temperatures, as well as steel structure exterior walls and roofs.

Suitable for interior walls and partitions of ordinary factory buildings with high fire protection requirements and general insulation requirements, as well as walls of simple warehouses and temporary buildings.

75mm

Suitable for industrial buildings with no strict temperature requirements, such as general warehouses, logistics warehouses, steel structure workshops, and livestock farms.

Suitable for general cold storage and insulation, constant temperature workshops (such as electronics, packaging, light industry, etc.), food processing plants, beverage plants, pharmaceutical and electronics cleanrooms, etc.

Suitable for general warehouses, logistics centers, office buildings, workshops, and showrooms.

100mm

Suitable for walls and roofs of large factories and warehouses, stadiums, markets, and large steel structure buildings, etc.

Suitable for industrial buildings, cold storage (0-5℃), food processing workshops, cold chain warehouses, etc., where high insulation and fire protection requirements are needed.

Suitable for high-standard factories, cleanrooms, hospitals, schools, public buildings, etc.

150mm

Suitable for buildings with high insulation requirements but limited budgets, such as ordinary factories and warehouses in cold regions.

Suitable for high-end constant temperature and humidity workshops, pharmaceutical warehouses, low-temperature cold storage (-18℃), cold chain logistics centers, dairy, meat and seafood processing workshops, etc.

Suitable for public buildings with strict fire protection requirements, large warehouses, long-span factories, and buildings with extremely high requirements for thermal insulation/sound insulation, such as concert halls.

 

 

In short, 50mm sandwich panels are suitable for interior walls, simple interior partitions, etc.; 75mm sandwich panels are suitable for ordinary factories and warehouses, etc.; 100mm sandwich panels are suitable for food factories and low-temperature cold storage, etc.; and 150mm sandwich panels are suitable for low-temperature cold storage and high-standard buildings, etc.

PROPANEL, Basée à Chengdu, en Chine, nous sommes spécialisées dans les panneaux sandwich haute performance pour les bâtiments industriels, frigorifiques et modulaires. Forts de plus de 15 ans d'expertise, nous exportons dans le monde entier, garantissant une fabrication de précision, un contrôle qualité et un excellent service client.
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