Renderer (trade)
Renderer is the trade applying cement render, acrylic render, and texture coats to masonry. Distinct from dry plasterer (plasterboard). Licensing varies by state.
Ask Chalkline about this →A renderer is a trade specialist who applies cement render, acrylic render, polymer-modified render, and texture coats to masonry walls (brick, block, concrete). The work is also called solid plastering in older terminology, distinguishing it from dry plastering (plasterboard sheeting, taping and setting). Some renderers do both; many specialise in render only.
What a renderer does:
- Cement render: traditional sand/cement/lime coats, one to three coats, hand-applied with hawk and trowel. See scratch coat, float coat.
- Acrylic and polymer-modified render: factory-blended, premixed; thinner build (2-5 mm), faster application, more flexible.
- Texture coats (sand-roll, sponge, troweled): decorative finish over base render.
- Patching and repair: cracks, sections behind removed fixtures, additions joining existing render.
- Bagging: thin “rag” of cement slurry over brick to even out the face without full render thickness.
Licensing across Australia (verified 2026-05-16):
| State | Licence required | Notes |
|---|---|---|
| NSW | NSW Fair Trading qualified supervisor required if contract over $5,000 | ”Plasterer” trade covers both wet and dry; renderer often endorsed separately |
| VIC | Domestic Building registration required if working on dwellings; class is “Plasterer (Solid)“ | VBA |
| QLD | QBCC “Plastering Solid” licence required for any project over $3,300 | Distinct from “Plastering Dry” |
| WA | Builder’s registration covers; renderer-specific licensing limited | BSB |
| SA | CBS registration for paid work | Licensing reform ongoing |
| TAS | CBOS Building Practitioner registration | |
| NT | Building Practitioners Board licensed builder | |
| ACT | Class A or B builder |
Why “renderer” vs “plasterer” matters: in residential building contracts and insurance schedules, the trade descriptor determines what licensing and what cover applies. A “plasterer” who only holds a Plastering Dry licence is not licensed to render in Queensland; pricing render work on that licence is non-compliant and unlikely to be covered by insurance.
Hiring a renderer (builder checklist):
- Check state licence card and currency (most state registers are online).
- Confirm public liability insurance (minimum $20 million for residential, common practice; verify the cover applies to render specifically).
- Ask for a recent comparable project (large, masonry, finish coat). Inspect the work in person.
- Confirm whether they do base coats only or carry through to finish (some sub-out the finish coat to a specialist).
- Confirm waste removal arrangements (cement render produces large amounts of slurry waste that becomes an OHS issue if left on site).
Common defects renderers cause or chase:
- Hairline shrinkage cracking in the float coat (often the underlying scratch coat shrank further after the float went on).
- Debonding from poorly prepared substrate (release agent on the brickwork, painted brick, or wax-finished concrete).
- Inconsistent finish-coat texture (rookie mistake on textured finishes).
- Hollow sound at corners and reveals (poor adhesion behind fixtures and at edges).
Also known as: plasterer (solid); solid plasterer; cement renderer; trowel hand.
Category: Trades.
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Last updated: 2026-05-16. Verified: 2026-05-16. Quarterly review for currency.