skip to Main Content

EXPOL R1.4 WHITE UNDERFLOOR INSULATION

EXPOL R1.4 White Underfloor Insulation is rigid Expanded Polystyrene panel designed to fit between the joists under a timber floor. It is used in normal urban home environments.

It is ideal to use in personal houses or properties which are tenanted. Changes to New Zealand’s Residential Tenancies Act mean landlords need to ensure all tenanted properties have proper floor and ceiling insulation. EXPOL UnderFloor insulation meets and exceeds the requirements of the Act. For an insulation product to provide adequate insulation to a rental property it needs to have a minimum insulation value of R1.3. EXPOL R1.4 White Underfloor insulation exceeds this with a value of R1.4 and EXPOL Black, used in extreme environments, has an insulation value of R1.8.

EXPOL UnderFloor insulation products are independently certified by BRANZ – the organisation which is responsible for testing and approving performance of building products in New Zealand.

EXPOL R1.4 - 410 White UnderFloor Insulation

EXPOL R1.4 - 360 White UnderFloor Insulation

EXPOL R1.4 - 470 White UnderFloor Insulation

EXPOL R1.4 - 560 White UnderFloor Insulation

Underfloor Insulation

EXPOL UnderFloor Insulation - R1.4 White Panel installed showing L Brackets to secure panel.

EXPOL UnderFloor R1.4 White is available in 4 convenient joist widths 360, 410, 470, 560 (mm). Quick and easy to install it is long-lasting insulation that creates a warm, dry home which is healthier to live in and costs less to heat. It can be used on new and existing timber floors and fits snugly between timber floor joists to stop drafts and damp from entering.

EXPOL UnderFloor R1.4 White Insulation is made of rigid polystyrene, so it won’t sag over time. It is also manufactured with flame retardant, is vermin resistant and helps reduce noise from timber floors.


EXPOL R1.4 White contains recycled content and can be easily recycled.

 

 

The benefits:

  • Easy to install
  • Concertina edges which allow for compression of up to 20 mm to create a tight fit
  • Contains recycled content and can be easily recycled
  • Flame retardant
  • Rigid
  • Resistant to moisture
  • No nutritional value to vermin, birds or animals
  • Ideal for both retro-fit applications and new floors
  • BRANZ Appraised and comes with a 50 year product warranty

BRANZ APPRAISAL

EXPOL R1.4 UnderFloor has a BRANZ appraisal.
See BRANZ certificate number 256.

INSULATION STANDARD
All EXPOL timber floor insulation solutions comply with the Australian and New Zealand Standard AS/NZS 4859.1:2002.

MANUFACTURING STANDARD
All panels have a yellow stripe down one edge to confirm compliance with manufacturing standard AS 1366 Part 3 1992 for SL grade.

It is used as an insulation solution for:

Underfloor Insulation

   Timber UnderFloor

EXPOL UNDERFLOOR INSULATION VIDEOS

DO IT ONCE – DO IT RIGHT

SIZES & R1.8 VERSES R1.4

MEASURING JOIST WIDTH

SECURING PANELS

WIREGUARD – HOW AND WHY

TESTING FLAMABILITY

UNDERFLOOR INSTALLATION

CALCULATORS

Underfloor Pack

R-Value

Panel Sizes

EXPOL White R1.4 Underfloor Insulation

FAQs

WHAT IS R-VALUE?

An R-Value is a rating which measures how well insulation can resist heat flow. ‘R’ stands for thermal resistance.

  • R-Value level depends on a number of things such as the type
    of material, its density and thickness.
  • Higher R-Value = Better insulation.

What happens to EXPOL UnderFloor Insulation in a fire?

EXPOL UnderFloor insulation is flame retardant and will not support a fire.

Does EXPOL UnderFloor Insulation give off any toxic fumes?

The level of toxicity of EXPOL UnderFloor insulation in a fire is no greater than that of burning timber.

What if my sizes differ from EXPOL UnderFloor Insulation standard size?

The flexi-cut edges of EXPOL UnderFloor insulation panels allow the panels to be adjusted to varying floor joist spacings.

Do I need to use fixings for a new floor?

Yes. When fixing from the top of the joist the nylon fixing is placed flush with the top of the joist, this ensures the panel sits flush with the underside of the floor. Usually a maximum of two fixings are used per panel.

How does EXPOL UnderFloor Insulation come?

EXPOL UnderFloor insulation is plastic wrapped and delivered to your merchant in bundles of approximately 6 square metres.

Product Properties

EXPOL Underfloor Insulation

EXPOL Installation Components

EXPOL Wireguard

EXPOL WireGuard

Where EXPOL R1.4 or R1.8  is exposed to electrical cables us EXPOL WireGuard  a waxed paper strip  to separate exposed electrical cables from the EXPOL R1.4 or R1.8 insulation. Expanded Polystyrene in some cases reacts with the plasticiser and degrades the elastic properties of some electrical cables over a prolonged period.

Fixings

There are two types of fixings specific to existing floors and new floors. They are made from non-corrosive nylon and are used to fix the EXPOL panels in place.

  • Existing Floors: EXPOL L Brackets are designed to fit under the panel (supplied with stainless steel nails).
  • New Floors: EXPOL Joist Saddles are designed to slip over the joist to support and secure the panel.

Sabre Fix Construction Adhesive

Sabre Fix is an advanced single component polyurethane-based construction adhesive. This powerful adhesive is developed especially for the construction industry and will bond most types of construction materials including timber (damp and dry), concrete, plasterboard, polystyrene and many other porous and non-porous substrates.

Downloads

   

EXPOL Technical Product Guide

   

EXPOL Underfloor Brochure

Where To Buy EXPOL

WHERE TO BUY EXPOL POLYSTYRENE PRODUCTS

EXPOL products are available at a number of leading building products stores. Find your nearest stockist here.

FIND STORES
Back To Top