Waterproof · Lightweight · Versatile
Build without limits
Thermasheet™ is a waterproof XPS-core construction board with reinforced cement-polymer faces, a finish-ready substrate for tiles, stone, render and microcement, inside and out.
100% waterproof core
Wet areas inside and out
Lightweight
Easy to carry and install
Tile-ready surface
Up to 60 kg/m² tile load
Thermal break
Boosts underfloor heating
Cuts easily
Knife, handsaw or track saw
Internal + external
Designed for Australian conditions
The range
One system, every substrate
Thermasheet Board
A waterproof XPS core with a cement-polymer coated face, the ideal surface to lay tiles directly. For walls, ceilings and floors in internal and external wet areas.
10 sizes · 6–100 mm
Thermasheet Flex & UltraFlex
Pre-scored curved boards that bend around a pre-formed frame for archways, curved walls, shower screens, columns, ceilings and bath or spa surrounds.
Radius down to 50 mm
Thermasheet Nib Walls
A simple way to build half- and full-height shower walls, with or without a built-in niche. Lightweight, waterproof and quick to install.
Brackets & screws included
ThermaNiche Wall Niches
Prefabricated, waterproofed wall niches that add storage to any shower. A built-in fall drains water away so it never sits on the shelf.
9 sizes · regular & curved
For installers
Simple steps. Professional results.
Step-by-step guides with stud spacing, fixing centres, sealing and waterproofing details. Built to use on your phone, on site.
PDF Installation Manual & Technical Guidev1 · September 2026 · 14 pages Download
01
Before you startCheck the substrate, tools, cutting method and general fixing rule before fixing any boards.
02
Framed wallsFixing Thermasheet to timber or steel stud walls, internal or external.
03
Ceilings & soffitsSupport spacing for straight and curved ceilings and soffits.
04
Masonry wallsFull-bed or dot-and-dab fixing to brick and block walls.
05
FloorsFloor-fixed boards over concrete, timber and cement sheet, including underfloor heating and sloped boards.
06
Thermasheet WallInstalling the pre-fabricated half- or full-height shower wall.
See all 11 installation guides →
Applications
Where Thermasheet works
Bathrooms and wet areasShowers, niches, vanities, steam rooms and bath surrounds.
Curved and architectural designCurved feature walls, shower screens, seating and planters.
House and garden exteriorsRender, tile or microcement direct over an insulating board.
Outdoor furniture and spasTiled lounges, daybeds, spa surrounds and firepit seating.
60 kg/m²Maximum tile loading (CERAM 121107)
ZeroCapillary water absorption (DIN 53428)
0/0/0/6Fire hazard indices (AS/NZS 1530.3)
6–100 mmBoard thicknesses available
Project spotlight
Westfield Whitford City column cladding
Pre-scored curved Thermasheet boards were used to clad the existing columns, saving time and labour while creating a seamless render-ready finish.
Curved board Commercial Render finish
View all projects →
Got a detail you're not sure about?
Talk to our technical team before you cut. Send plans or photos and we'll help.