Waterproofing Behind Your Splashback: Essential Tips
In modern kitchen and bathroom design, the splashback is more than an aesthetic element—it’s a protective barrier against water damage, mold, and costly repairs. However, even the best splashback won’t perform effectively without proper waterproofing behind it. Here’s what every homeowner and installer needs to know to keep things watertight and worry-free.
1. Understand Why Waterproofing Matters
Waterproofing is your first line of defense. Behind every sink, stove, or shower, moisture constantly threatens to seep through small cracks or unsealed joints. Without a waterproof layer, this moisture can infiltrate the wall substrate, causing swelling, decay, and mold buildup. A correctly waterproofed surface ensures long-term durability and hygiene.
2. Choose the Right Backing Material
Before installing your splashback, ensure the wall surface is suitable. Avoid using standard plasterboard or MDF near wet areas—they absorb water easily. Instead, opt for cement boards or moisture-resistant plasterboards, which create a stable foundation. When paired with a high-quality waterproof membrane, they form a reliable base for glass, acrylic, or tile splashbacks.
3. Apply a Waterproof Membrane
For full protection, apply a liquid waterproof membrane or sheet membrane to the wall before fixing the splashback. Liquid membranes are easy to brush or roll on and dry into a seamless layer. Pay special attention to corners, seams, and edges—these are your weak points. Two coats are typically recommended for maximum resistance.
4. Use Quality Sealants
No matter how perfectly you install your splashback, the joints and edges are where most leaks begin. Always use 100% silicone sealant rather than acrylic alternatives. Silicone is flexible, waterproof, and resistant to mold growth—making it ideal for sealing around sinks, countertops, and wall junctions.
For best results, match your sealant color to your splashback for a polished finish.
5. Check Compatibility with Your Splashback Type
Different materials require different waterproofing approaches:
Glass Splashbacks: Ensure the wall surface is perfectly smooth, dry, and primed before applying adhesive.
Acrylic Splashbacks: Avoid solvent-based adhesives; use approved products to prevent warping.
Explore material-specific guides at DIY Splashbacks to ensure your chosen splashback is installed with the right waterproofing strategy.
6. Regular Maintenance
Even after installation, periodic inspection is essential. Check seals for cracks or gaps, and reapply silicone where necessary. A few minutes of maintenance can prevent years of water damage.
Final Thoughts
Waterproofing isn’t an optional step—it’s the backbone of a long-lasting splashback installation. When done correctly, it preserves the integrity of your walls, enhances hygiene, and ensures your splashback looks as stunning years from now as it did on day one.