The Battle of Insulation; Which Sandwich Panel Foam is Best for Your Project?

In the world of modern construction, speed of implementation, optimization of energy consumption and reduction of operating costs are of particular importance. For this reason, many traditional materials have given way to advanced materials that can meet multiple needs at the same time. In the meantime, sandwich panels have become one of the most widely used prefabricated materials in industrial, commercial and residential projects.

Despite the apparent similarity of many sandwich panels, the main factor determining their performance is in the middle part of the structure; namely the insulation core or sandwich panel foam. The choice of foam type has a direct impact on the level of insulation, safety, durability and long-term costs of the project.

The importance of choosing the right insulation core in sandwich panels

The sandwich panel structure consists of two layers of metal sheets, usually galvanized or aluzinc, and an insulation core. The outer sheets are responsible for protecting against environmental conditions and providing structural strength, but the thermal, refrigeration and to some extent acoustic performance of the panel depends on the type of insulation core.

Incorrect foam selection can increase operating costs. For example, in cold stores, the use of insulation with poor thermal performance increases energy consumption and puts more strain on cooling equipment. Also, in environments with high fire safety requirements, the selection of an inappropriate core can create serious risks.

Polyurethane (PU) sandwich panels; a choice with high thermal performance

Polyurethane is one of the most widely used insulation cores in the sandwich panel industry. Due to its closed-cell structure, this foam has a low heat transfer coefficient and is used in many projects that require proper thermal and refrigeration insulation. The density of this foam is usually in the range of 38 to 42 kg / m3.

Advantages of polyurethane

- Suitable thermal and refrigeration insulation for cold stores, food industries and controlled spaces.
- Low moisture absorption and optimal performance in humid areas.
- Relatively low weight and adequate strength.
- Possibility of production with more fire-resistant formulations.

It should be noted that polyurethane is not inherently fireproof. Its improved type, namely polyisocyanurate (PIR), has better fire behavior compared to conventional polyurethane and is classified as a slow-burning insulation.

Rock wool sandwich panel; an option for projects with fire requirements

Rock wool is produced from mineral fibers obtained from melting basalt rock and its most important advantage is its very high fire resistance. For this reason, it is widely used in projects such as petrochemical industries, power plants, chemical factories and buildings with strict fire safety requirements.

Advantages of rock wool

- Very high resistance to fire and no flame spread.
- Suitable sound insulation to reduce sound transmission.
- Stability at high temperatures.

In contrast, this type of insulation weighs more than polyurethane and in terms of thermal performance, it usually requires a greater thickness to achieve the same insulation. Also, in the event of moisture penetration and improper implementation, part of its insulation performance may be affected.

Polystyrene (EPS) sandwich panel; an economical solution

Expanded polystyrene (EPS), also known as Unolit, is used in many public projects and structures with limited budgets due to its reasonable price and low weight.

Advantages of polystyrene

- Lower initial cost than other foams.
- Light weight and easy installation.
- Suitable for dry warehouses, workshop camps and temporary structures.

Of course, EPS has a weaker thermal performance than polyurethane, and its fire resistance also depends on the type and additives used. Therefore, for projects such as cold stores or spaces with high fire safety requirements, it is usually not considered the first choice.

Ultimately, which foam is more suitable?

The answer to this question depends on the project needs:

- If your priority is maximum thermal insulation and reduced energy consumption, polyurethane or PIR will be a good choice.

- If fire safety is the most important project criterion, rock wool is considered the superior option.

- If budget is limited and economic implementation is considered, polystyrene can meet the project needs.

In fact, no foam can be considered the best option for all projects; the right choice is made when the technical conditions, safety requirements, and project budget are examined simultaneously.

Engineering Consulting and Supply of the Best Material in Sabat Sanat

Choosing the material is not the end of the matter; The quality and source of this material will ensure the success of your project. In today's volatile market, access to quality products from reputable brands at a fair price is one of the main concerns of contractors and employers.

Sabat Sanat Company, as one of the most reputable and largest suppliers of sandwich panels in the country, has completely resolved this concern. By creating a powerful supply network, we provide the best and highest quality panels on the market (including polyurethane, rock wool and polystyrene) directly to your projects by eliminating intermediaries.

If you are still unsure about choosing the type of foam and thickness of the sheets or want to inquire about the up-to-date and competitive price of sandwich panels before purchasing, our engineering team is by your side. Sabat Sanat specialists are ready to suggest the best option based on your climate, type of use and budget.

Make the smart decision for your project now. For a free consultation, cost estimate, and order, contact our experts at 

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