EPISODE · Jun 22, 2026 · 5 MIN
Why Roof Biocide Doesn’t Last — But Render Is Different
from The Mark Cave Soft Washing Podcast SoftWash UK · host Mark Cave
Mark Cave breaks down the myth of long-lasting roof biocide, explaining why rain quickly washes chemicals off pitched roofs and why stain-free guarantees are really about natural regrowth cycles. He also covers the porous-render exception, showing how deep biocide treatment can support ongoing maintenance plans and recurring revenue.
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Why Roof Biocide Doesn’t Last — But Render Is Different
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