What Is the Best Insulation Material?

In Turkey, with rising energy costs, one of the most frequently asked questions is: “What is the best insulation material?”

Thermal insulation does not only reduce energy consumption; it also extends building life, increases comfort, and improves property value.

However, there are many different insulation materials on the market:

• Rock wool (stone wool)
• Glass wool
• XPS
• EPS
• Polyurethane foam
• Rubber insulation

Each material has different technical properties, advantages, and application areas. Therefore, correct selection is critical for project success.

What Is Rock Wool?

Rock wool is an insulation material produced by melting basalt stone at high temperatures.

In Turkey, one of the most commonly used brands is İzocam rock wool products.

Advantages of Rock Wool

• A1 fire class (non-combustible)
• High sound insulation performance
• Good thermal insulation
• Vapor permeability
• Long service life

Where Is It Used?

• External wall insulation (ETICS)
• Industrial facilities
• Fire protection systems
• Steel structures
• Mechanical installations
• Roof insulation

Rock wool is especially preferred in buildings where fire safety is critical.

What Is Glass Wool?

Glass wool is a lightweight insulation material made from recycled glass.

Advantages of Glass Wool

• Lightweight structure
• Cost-effective solution
• Good thermal insulation
• Easy installation

Applications

• Roof insulation
• Partition walls
• Suspended ceilings
• HVAC duct systems

Glass wool is widely used in residential construction projects.

What Is XPS?

XPS (Extruded Polystyrene) is a high compressive strength insulation material.

Advantages of XPS

• Water resistance
• High compressive strength
• Long-lasting performance
• Low water absorption

Applications

• Foundation insulation
• Inverted roofs
• Parking deck insulation
• Industrial flooring systems

XPS is preferred in systems exposed to heavy loads.

What Is EPS?

EPS (Expanded Polystyrene) is an economical insulation material widely used in façade insulation systems.

Advantages of EPS

• Low cost
• Lightweight structure
• Easy installation
• Good thermal performance

Applications

• External thermal insulation systems (ETICS)
• Residential buildings
• Decorative façade systems

EPS is one of the most commonly used insulation materials in Turkey.

What Is Polyurethane Foam?

Polyurethane foam is a modern insulation material with very high thermal performance.

Advantages of Polyurethane

• Very low thermal conductivity
• Seamless application
• Fast installation
• High energy efficiency

Applications

• Roof insulation
• Cold storage facilities
• Industrial buildings
• Metal roofs

It is especially preferred in energy-efficient building designs.

So, What Is the Best Insulation Material?

The answer depends on the application area.

For Fire Resistance

Best option: Rock wool

For Economical Façade Insulation

Best option: EPS

For Foundations and Inverted Roofs

Best option: XPS

For High Energy Efficiency

Best option: Polyurethane foam

For Sound Insulation

Best option: Rock wool

Roof Insulation or Wall Insulation?

One of the most common mistakes is focusing only on façade insulation.

In reality:

• ~25% of heat loss occurs through the roof
• ~35% through walls
• ~15% through floors

Therefore, a professional insulation system should include:

• Roof insulation
• Façade insulation
• Foundation insulation
• Mechanical insulation

Why Is Waterproofing Important?

Thermal insulation alone is not enough without proper waterproofing.

Without waterproofing:

• Concrete deterioration occurs
• Steel reinforcement corrodes
• Mold and dampness appear
• Structural damage develops

Therefore, systems such as:

• Bituminous membranes
• PVC membranes
• TPO membranes
• Cement-based waterproof coatings

are widely used in professional projects.

Energy Efficiency Requires Proper Insulation

Correct insulation systems:

• Reduce heating costs
• Lower cooling expenses
• Reduce carbon emissions
• Extend building lifespan
• Increase comfort

Today, insulation is no longer a luxury but a necessity.

Professional Solutions by Haydar Boz Yalıtım

Haydar Boz Yalıtım has been operating since 1953 and is one of the established companies in Turkey’s insulation sector.

The company provides professional solutions in:

• Thermal insulation
• Waterproofing
• Fire insulation
• Sound insulation
• Roofing systems
• Construction chemicals
• Industrial insulation

Main Brands Used

• İzocam
• Technoplan
• UKS Membran
• Armacell
• Kalekim
• Fischer