Floor Insulation For South African Homes & Buildings

Keep your home warmer in winter and cooler in summer with professional floor insulation. Insulating under your floors reduces heat loss, stops cold drafts, and lowers your electricity bills — making it one of the smartest ways to improve comfort and energy efficiency in South African homes.

Want a quick idea of what insulation costs? View our full price list for 2025.

Why Floor Insulation is Important

Most homeowners think about insulating their ceilings and roofs first — but floors can account for up to 10–15% of total heat loss in an uninsulated home.

Proper insulated floors:

✅ Prevents warmth escaping through floors in winter
✅ Stops cold air rising from crawl spaces or under timber floors
✅ Helps maintain a stable indoor temperature all year
✅ Reduces condensation and damp problems
✅ Complements ceiling and wall insulation for maximum savings

Whether you have a timber floor, concrete slab, or raised foundation, adding insulation is one of the most effective upgrades you can make.

Types of Floor Insulation

Choosing the right floor insulation depends on your building type, climate needs, and whether you’re insulating timber floors, concrete slabs, or crawl spaces. Each product offers unique advantages for improving comfort, reducing energy costs, and helping maintain stable indoor temperatures year-round.

Glasswool Insulation For Floors

Perfect for placing between joists under suspended timber floors. Glasswool delivers excellent thermal performance, is completely non-combustible, and holds its shape for decades.

✅ Aerolite Glasswool
✅ Knauf Glasswool

View our glasswool insulation options

Polyester Insulation For Floors

Polyester is made from recycled PET plastic and is soft to the touch — no itch, no harmful chemicals. It’s ideal for homeowners wanting a hypoallergenic, eco-friendly solution for timber floors.

✅ Isotherm Polyester
✅ Fabufill Polyester

Explore our polyester insulation

Polystyrene Board Insulation For Floors

Rigid polystyrene boards (XPS) are used under concrete slabs, screeds or in crawl spaces. They offer high R-values, resist moisture, and are strong enough to support flooring systems without compressing.

✅ Summit XPS Boards

See our polystyrene insulation products

Rockwool Insulation For Floors

Rockwool is the best choice for floors needing additional fire resistance or acoustic control. It withstands very high temperatures, repels water, and prevents mold growth.

✅ Rockwool Glasswool

Discover our rockwool insulation

Floor Insulation Costs in South Africa

Pricing varies depending on floor type, insulation material, and size of the area. As a rough guideline:

Please contact us for an exact quote based on your specific project and location.

Floor Insulation Comparison Table

With several types of insulation available for different floor types, it’s helpful to compare their key features side by side. The table below highlights how each product performs in terms of thermal efficiency, acoustic control, and moisture resistance, helping you choose the best solution for your specific needs.

Compliance with SANS 10400-XA

In South Africa, energy efficiency standards under SANS 10400-XA make thermal insulation an essential part of new builds and major renovations. Proper floor insulation helps you meet these requirements, improve your home’s energy rating, and lower heating or cooling demands.

Why Choose Us to Insulate Floors?

✅ Experienced local team with professional, neat installations
✅ Fully compliant with South African building regulations
✅ We only use high-quality, proven insulation products
✅ Friendly, personalized service from quote to final clean-up

Ready to Upgrade Your Floors?

Floor insulation is one of the simplest ways to transform your home into a more comfortable, energy-efficient space. It helps stop heat loss in winter, keeps floors cooler in summer, and can significantly reduce your electricity bills over time.

Take the next step toward a warmer, quieter home. Request a free floor insulation quote today, and discover just how much you could save on heating and cooling costs.

Explore More Insulation Solutions

Learn about insulating your ceilings on our ceiling insulation page.
See how to keep heat out from above with our roof insulation services.
Find out how wall insulation can make your home more energy efficient and comfortable.
Discover the benefits of thermal insulation for your entire home.
Want to understand how floor insulation is installed? Read our step-by-step how to insulate floors guide.