Acoustic & Thermal Glasswool Rolls

Cavitylite Wall Insulation

Cavitylite glasswool rolls provide thermal insulation and sound absorption for drywall systems, timber frames and steel frame structures. Choose 51mm, 63mm or 102mm thicknesses, with glass tissue facing on one side for easier handling and improved rigidity.

View Cavitylite Prices Request a Supply Quote
Isover Cavitylite sealed pack beside an open glasswool insulation roll
51mm R-value 1.34 63mm R-value 1.66 102mm R-value 2.68
Thermal comfort.
Sound absorption.
Thermal Comfort R-values from 1.34 to 2.68 across the range.
Sound Absorption Glasswool insulation for acoustic performance in drywall.
Non-Combustible SANS 428 fire classification: A/A1/1.
600mm Roll Sections 1200mm wide rolls slit into two 600mm sections.
Tissue Faced Glass tissue on one side for handling and improved rigidity.

Choose Your Cavitylite

Find the right Cavitylite thickness

Compare 51mm, 63mm and 102mm Cavitylite by thermal resistance, roll length, pack coverage and price. Choose a thickness that matches the cavity depth and specification of your wall or partition.

Isover Cavitylite sealed pack beside an open glasswool insulation roll

Cavitylite
51mm

  • Roll section: 6000 × 600mm
  • Sections per pack: 2
  • Pack coverage: 7.2m²
  • R-value: 1.34 m²·K/W
  • Price per pack: Request a quote
Request a Quote
Isover Cavitylite sealed pack beside an open glasswool insulation roll

Cavitylite
63mm

  • Roll section: 5400 × 600mm
  • Sections per pack: 2
  • Pack coverage: 6.48m²
  • R-value: 1.66 m²·K/W
  • Price per pack: Request a quote
Request a Quote
Isover Cavitylite sealed pack beside an open glasswool insulation roll

Cavitylite
102mm

  • Roll section: 5400 × 600mm
  • Sections per pack: 2
  • Pack coverage: 6.48m²
  • R-value: 2.68 m²·K/W
  • Price per pack: Request a quote
Request a Quote

Prices are per pack. Cavitylite is supplied 1200mm wide, slit into two 600mm roll sections. Pack coverage includes both sections and excludes cutting waste.

About the Cavitylite Range

Cavitylite
Glasswool Wall Insulation

Cavitylite is a non-combustible glasswool insulation roll range developed for drywall systems, timber frames and steel frame structures. Its fibrous structure helps reduce heat transfer and absorb sound within the cavity, contributing to the thermal and acoustic performance of the complete wall system.

Available in 51mm, 63mm and 102mm thicknesses, Cavitylite is supplied 1200mm wide, slit into two 600mm roll sections. Glass tissue facing on one side improves handling and rigidity, while compression packing reduces transport and storage volume. Match the thickness to your cavity depth and wall insulation specification, then cut and fit the rolls without gaps according to the manufacturer’s instructions.

Tissue Faced Faced on one side for handling and rigidity
14kg/m³ Density Consistent density across all three thicknesses
600mm Sections Two roll sections supplied in each pack
Compare Thicknesses & Pack Prices

Cavitylite Prices & Cost Guide

Compare 51mm, 63mm and 102mm Cavitylite by price per pack, pack coverage, material R-value and cost per square metre.

Choosing the Right Cavitylite Thickness

Match the roll thickness to the available cavity depth and your wall-system specification. Cut and fit the insulation without gaps or unnecessary compression.

Compare the cost per square metre as well as the pack price. The 51mm pack covers 7.2m², while the 63mm and 102mm packs each cover 6.48m² before cutting waste.

Pack Price Comparison
Product Pack Coverage Material R-value Pack Price incl. VAT Material Cost / m²
51mm Cavitylite 7.2m² per pack 2 sections · 6000 × 600mm each 1.34 m²·K/W Request a quote On quotation
63mm Cavitylite 6.48m² per pack 2 sections · 5400 × 600mm each 1.66 m²·K/W Request a quote On quotation
102mm Cavitylite 6.48m² per pack 2 sections · 5400 × 600mm each 2.68 m²·K/W Request a quote On quotation

Price Per Pack

Prices are for a complete pack of the selected thickness, including VAT.

Two Sections Per Pack

Each 1200mm wide roll is slit into two 600mm sections. Coverage includes both.

Material Cost Per m²

Each pack price is divided by that thickness’s total pack coverage.

Prices include VAT and cover the insulation material only. Coverage excludes cutting waste. Delivery, wall framing, boards, fixings and installation are additional costs. R-values shown are for the insulation material, rather than the complete wall assembly.
Compare Cavitylite Options

Technical Specifications

Cavitylite Product Specs

Select a thickness below to compare Cavitylite roll dimensions, pack coverage, R-values, packed dimensions and fire classification.

Isover Cavitylite sealed pack beside an open glasswool insulation roll
51mm

Cavitylite 51mm Technical Specifications

Product 51mm Cavitylite
Product type Wall Insulation
Material Glasswool
Thickness 51 mm
Roll section size 6000 × 600 mm
Pack quantity 2 roll sections
Section coverage 3.6 m²
Pack coverage 7.2 m² per pack
R-value 1.34 m²·K/W
Density 14 kg/m³
Thermal conductivity 0.038 W/(m·K)
Facing Glass tissue on one side
Packed dimensions 1220 × 339 mm
Fire classification SANS 428: A/A1/1
Applications Drywall systems, timber frames and steel frame structures
Technical datasheet Cavitybatt & Cavitylite PDF
Thermal resistance: 1.34 m²·K/W
Sound absorption within framed walls and drywall cavities
Glass tissue facing on one side for handling and improved rigidity
Non-combustible, tested to SANS 10177 Part 5
Two roll sections per pack, covering 7.2 m²

Rolls are supplied 1200mm wide, slit into two 600mm sections. Pack coverage includes both sections and excludes cutting waste. R-values are for the insulation material rather than the complete wall assembly. Sound reduction depends on the complete partition construction and correct installation.

Need Cavitylite for Your Walls?

Tell us the area to be insulated and whether you need 51mm, 63mm or 102mm Cavitylite. We can help calculate pack quantities and provide a supply quote for your project, including delivery pricing.

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