Replacing a shower screen panel yourself is possible in some straightforward situations, but there are important safety, legal, and waterproofing considerations that every NZ homeowner needs to understand before picking up a screwdriver. Get it wrong and you could face injury risks, a leaking bathroom, or a non-compliant installation.
Understanding Safety Glass Requirements
This is the most critical point: any glass used in a shower screen must be safety glazing. Under the NZ Building Code, specifically clause F4 (Safety from Falling) and the requirements around human impact safety, shower screens must be glazed with either:
- Toughened (tempered) safety glass — typically 6 mm thick minimum for shower screens
- Laminated safety glass — which holds together if broken
Ordinary float glass is not acceptable and is genuinely dangerous in a wet, enclosed space. When sourcing a replacement panel, always confirm with your supplier that the glass meets NZS 4223 (Glazing in Buildings). Reputable glazing suppliers will be able to confirm this. Do not be tempted to cut costs with non-compliant glass.
What the Job Actually Involves
Before deciding to DIY, assess what type of shower screen you have:
| Screen Type | DIY Feasibility | Notes |
|---|---|---|
| Framed panel (aluminium frame) | Moderate | Panel slides or clips out; replacement is more straightforward |
| Semi-frameless | Moderate–Difficult | Clips and hinges need careful alignment |
| Fully frameless | Difficult | Heavy glass, precise hardware; best left to a glazier |
| Fixed panel (silicone-sealed) | Difficult | Requires careful silicone removal and re-sealing |
Step-by-Step Overview for a Framed Panel
If you have a standard framed shower screen and are confident in your DIY skills, here is a general process:
1. Measure carefully
Measure the existing panel's height, width, and thickness before ordering. Take measurements in at least two places — bathroom walls are rarely perfectly square.
2. Order the correct safety glass
Contact a local glass supplier and specify toughened safety glass to NZS 4223. Have them cut it to size — do not attempt to cut toughened glass yourself (it will shatter).
3. Remove the old panel
Wear heavy-duty gloves and safety glasses. If the old glass is cracked, place tape across it first to hold fragments together. Carefully remove any retaining strips or clips, then lift the panel out.
4. Clean the frame
Remove old silicone, dirt, and debris from the frame channels. A silicone remover product (available at Bunnings or Mitre 10) helps here.
5. Install the new panel
Fit glazing tape or setting blocks into the frame channel as required, slide the new panel in, and refit retaining strips. Follow the original manufacturer's method.
6. Re-seal with silicone
Use a bathroom-grade, mould-resistant silicone to seal around the panel edges where they meet the wall or tray. This is critical for waterproofing. Poor sealing leads to water damage behind walls — a costly repair. BRANZ has good guidance on wet area waterproofing requirements.
Waterproofing and the Building Code
Shower enclosures fall under Building Code clause E3 (Internal Moisture). The waterproofing membrane behind your tiles and around the shower base must remain intact. If removing the screen panel disturbs any tiles, grout, or the existing waterproofing layer, you may be opening up a larger job. If you suspect the waterproofing is compromised, stop and consult a professional — water damage inside wall cavities is a serious and expensive problem.
Do You Need a Building Consent?
Simply replacing a like-for-like shower screen panel is generally considered maintenance and is unlikely to require a building consent under Schedule 1 of the Building Act. However, if you are changing the size, configuration, or type of screen, or if any structural work is involved, you should check with your local council first. Always confirm — rules can vary. Visit MBIE Building Performance for general guidance.
Safety First
- Always wear cut-resistant gloves and safety glasses when handling glass
- Never work alone when handling large panels — get a helper
- If the existing glass is broken, treat every fragment as a hazard
- Dispose of broken safety glass carefully, wrapped in newspaper and cardboard, clearly labelled
- Check WorkSafe NZ for manual handling guidance if you are lifting heavy panels
When to Call a Professional
Call a licensed glazier if:
- You have a fully frameless or complex semi-frameless screen
- The panel is large or very heavy (risk of injury and breakage)
- You are unsure whether the existing glass is safety-rated
- The frame is damaged, corroded, or out of square
- There are signs of water damage or compromised waterproofing
- You are not confident in your ability to achieve a watertight silicone seal
Note that shower screen work does not involve restricted electrical, gas, or plumbing work in most cases — but if your screen replacement requires any plumbing changes (e.g. moving a drain or shower rose), that work must be carried out by a registered plumber.
A qualified glazier will have the right tools, access to compliant glass, and the experience to get the job done safely and correctly. You can find local glaziers on tradedirectory.co.nz.
Window & Glass Association
