What Should a Tiler's Contract Include Before Work Starts?

Before a single tile is laid, having a clear written contract with your tiler is one of the smartest things you can do. A good contract sets expectations on both sides, helps avoid disputes, and gives you a paper trail if something goes wrong. Here's what to look for — and what to insist on — before work begins.

Why a Written Contract Matters

Verbal agreements can quickly become "he said, she said" situations. A written contract is legally enforceable and gives both parties clarity on scope, cost, and timeline. Even for smaller jobs like a bathroom splash back, a simple written quote or agreement is worth having. For larger projects — full bathroom or kitchen tiling, outdoor areas, or commercial work — a detailed contract is essential.

Consumer NZ recommends always getting a written agreement before any trade work begins, no matter the size of the job.

Key Elements Every Tiling Contract Should Include

1. Full Contact and Business Details

The contract should clearly state:

• The tiler's full name and business name
• Their physical address and contact number
• Their New Zealand Business Number (NZBN) or GST number if they're GST-registered
• Whether they hold any relevant trade qualifications or memberships

If the work involves waterproofing in a wet area (bathroom, shower, laundry), check whether the tiler is a Licensed Building Practitioner (LBP). Under the NZ Building Code, restricted building work in certain situations must be carried out or supervised by an LBP — always confirm with your local council whether your project qualifies.

2. Detailed Scope of Work

This is the heart of the contract. It should describe exactly what work will be done, including:

• Which rooms or areas are being tiled
• Surface preparation required (e.g. removing old tiles, levelling substrate)
• Waterproofing membrane application (critical in wet areas under NZ Building Code clause E3)
• Tile layout, pattern, and direction
• Grouting, siliconing, and finishing details
• Any associated work such as removing and reinstating fixtures

Vague scopes like "tile bathroom" are not enough. The more specific, the better.

3. Materials Specification

The contract should list every material being used, including:

• Tile brand, product name, colour, size, and finish — ideally with the supplier's product code
• Adhesive type and brand (e.g. products from Ardex or Mapei are widely used in NZ)
• Grout colour and type
• Waterproofing membrane brand and system
• Any movement joint or trim products

Also clarify who supplies the tiles — you or the tiler — and who is responsible if tiles are damaged or short. It's standard practice to order 10–15% extra for cuts and breakage.

4. Pricing and Payment Terms

The contract must clearly state:

• The total price (or a clear breakdown of labour vs. materials)
• Whether the price is fixed (lump sum) or estimate-based — and what happens if costs change
• GST inclusion (all prices should state whether GST is included or excluded)
• Payment schedule — for example, a deposit upfront, progress payments at set milestones, and a final payment on completion
• Acceptable payment methods

Be cautious of tilers asking for large upfront deposits (more than 10–20% is unusual for residential work). Never pay the full amount before the job is finished and you're satisfied.

5. Timeline and Start/Completion Dates

The contract should include:

• Expected start date
• Estimated completion date or duration
• What happens if there are delays (weather, material supply, other trades)

Tiling often depends on other trades finishing first (e.g. plumbers, builders), so some flexibility is reasonable — but the contract should acknowledge this.

6. Variations Process

If the scope changes during the job — for example, you decide to tile an extra wall, or hidden damage is found — the contract should explain how variations are handled. Any changes to price or scope should be agreed in writing before the extra work begins.

7. Warranties and Defect Liability

A reputable tiler should offer a workmanship warranty — typically 12 months is standard, though this can vary. The contract should state:

• What the warranty covers (e.g. tile adhesion, grout cracking, waterproofing)
• How defects should be reported
• The process for rectifying issues

Note that tile and adhesive manufacturers also offer their own product warranties. BRANZ provides useful guidance on building product performance and installation standards.

8. Insurance

Confirm the tiler holds public liability insurance and, if they have employees, employer's liability cover. Ask to see a current certificate of insurance. This protects you if something is damaged or someone is injured on your property during the job.

A Quick Contract Checklist

When to Call a Professional

For any tiling in wet areas (showers, bathrooms, laundries), waterproofing is critical and must comply with the NZ Building Code. Depending on the scope, this may require a building consent or must be carried out by an LBP. Always check with your local council before starting. You can find qualified, experienced tilers in your area through tradedirectory.co.nz.

If your project involves plumbing (moving waste pipes, relocating fixtures), that work is restricted and must be done by a licensed plumber registered with the Plumbers, Gasfitters and Drainlayers Board.

Sources & Further Reading

• Consumer NZ – Hiring a tradesperson
• Licensed Building Practitioners – LBP register
• MBIE Building Performance – NZ Building Code
• BRANZ – Building research and best practice
• Ardex NZ – Tile adhesives and waterproofing
• Mapei NZ – Tiling systems and products