How long does torch-on last compared to liquid membranes?

Torch-on roofs last 15–20 years, while seamless liquid membranes last 25–30 years.

Which costs more upfront?

Torch-on is cheaper upfront at $70–$100/m², while liquid membranes cost $90–$130/m².

Which roof is best for Christchurch?

Seamless membranes are better for Christchurch’s weather, lasting longer and resisting UV damage.

Geoff Lanagan 9/22/25 Geoff Lanagan 9/22/25

Torch-On vs. Seamless Liquid Membrane: Which Roof Lasts Longer?

Torch-on membranes last around 15–20 years, while seamless liquid membranes can protect your roof for 25–30 years. This blog compares lifespan, cost, and performance in Christchurch’s climate, helping you decide which roofing system offers the best long-term value and fewer leak risks.

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Torch-On vs. Seamless Liquid Membrane: Which Roof Lasts Longer?

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