A properly installed liquid membrane waterproofing system is a long-term investment, but “long-term” depends on a few real-world factors — especially in Malta, where roofs and terraces face intense summer sun, sudden winter rain, and constant use for water tanks, solar panels and outdoor living.
Typical Lifespan
A well-installed liquid membrane system typically lasts 10–20 years before it needs renewing, depending on the product used, the quality of the application, and how exposed the surface is. Some premium reinforced systems can last even longer with the right maintenance.
What Affects How Long It Lasts
- Surface preparation: a membrane applied over a poorly prepared or damp surface will fail far sooner than one applied correctly
- UV exposure: Malta’s strong sun degrades unprotected membranes faster — a UV-resistant top coat significantly extends lifespan
- Foot traffic: roofs used regularly for access need a more durable protective layer to avoid premature wear
- Standing water: poor drainage falls mean water sits longer, accelerating wear at any weak points
- Number of penetrations: more pipes, tank stands and upstands mean more detail work — and more potential failure points if not done properly
Signs It’s Time to Re-Waterproof
- Cracking, bubbling or flaking on the membrane surface
- Damp patches appearing on ceilings below
- Water pooling that takes longer than usual to drain
- The membrane is 10+ years old and hasn’t been inspected recently
Simple Maintenance That Extends Lifespan
- Keep drains and outlets clear of debris, especially after storms
- Avoid dragging heavy equipment across the membrane surface
- Have the roof inspected every few years, particularly around penetrations and upstands
- Address small cracks or damage early, before water gets underneath the membrane
Why Choose Shaw Contractors
We install waterproofing systems built to handle Malta’s climate, and we’re happy to inspect existing waterproofing to tell you honestly whether it needs attention. Read our complete guide to liquid membrane waterproofing for the full picture.
Not sure about the condition of your roof or terrace? Contact Shaw Contractors for a free inspection.
