Polystyrene Insulation

Polystyrene Insulation

Underfloor polystyrene insulation is a well known product on the market in New Zealand. It works in your home just like it does when it insulates as a coffee cup or chilly bin. The material that polystyrene insulation is made from is a highly processed, synthetic material based on petrochemicals, with fire retardant added during manufacture. 

There are different forms of polystyrene insulation products available on the market, each with small differences. We prefer to sell Chillguard as it is one of the more simple and effective products to install. 

Polystyrene insulation is more rigid than some insulation options, but has the benefits of being able to withstand extremes in temperatures, and is also a noise reducer due to its density. Polystyrene insulation is great for dampening sound reverberation in wooden floorboards. Unlike other insulation materials, polystyrene insulation is waterproof and lasts a long time making it stand out as an exceptionally good product so long as it is installed well.

Polystyrene insulation comes in rigid sheets and planks which can be used under concrete floor slabs, in exterior walls and cladding and insulation and in ceilings. It available in a wide variety of widths (360mm, 410mm, 440mm, 470mm and 560mm) and it is always installed between your joists, with each piece cut carefully to size and friction fit up in place.

A disadvantage of Polystyrene Insulation is that it can break down the TPS sheathing of electrical cables if it is in contact with it over an extended period of time. A barrier should always be maintained between polystyrene insulation and electrical cables at all times.

Our Service

Our knowledge of insulation and the materials available stems from extensive and continued market research and from years of installing the materials that we sell. To get the best result you need the right advice on the correct product for your home and the best way to install it.

We have installed insulation into over 15,000 houses. That’s the experience you need.

We offer the convenience of a full installation service, full assessment service, including our RentFit Healthy Home report, phone and online ordering as well as a prompt delivery service, we also have a warehouse where products can be viewed, demonstrated and purchased.  We know existing and older houses, we know what works and we are happy to share our knowledge!

As with all our products and services, when it comes to polystyrene insulation, where possible, we aim to sell NZ made products and ensure our high quality standards are continuously met. 

We will work with you to understand your underfloor insulation requirements and offer you specialist advice on the suitability of polystyrene insulation to warm up your home.

Contact us to discuss your polystyrene insulation requirements.