My 1970s semi-detached house in Delft has a lot of green moss and algae buildup on the roof tiles and gutters. It's been there for years and I'm worried it might damage the tiles or block drainage. Should I hire someone or can I do it myself safely? What's a realistic budget for this job?
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Moss and algae removal from roof tiles and gutters typically costs €300–€800 in the Netherlands, depending on roof size, pitch, and accessibility. A single-story semi like yours (≈80–100 m² roof) usually falls in the €400–€600 range. Costs are driven by safety equipment (scaffolding if needed), water pressure method vs. gentle cleaning (important—high pressure can damage old tiles), and gutter clearing. You can DIY safely only from the ground with a soft brush and low-pressure rinse; climbing a 1970s roof is a fall risk. Many insurers won't cover DIY roof work. Professional cleaners typically use biodegradable moss killer + gentle wash to prevent regrowth. Post your job on AstraNL to get local Delft quotes and compare methods—verified pros can assess whether your tiles need special care.
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