Knowledge base
The things we explain most often on the phone, written down. Every article starts with the answer and also says when you do *not* need us — which saves you a phone call and us a quote that was never going anywhere.
When does a gutter need clearing, and what does waiting cost?
Late November or early December, once the leaves are down — not October, or the gutter will be full again by January. Once a year is enough unless there are conifers or a plane tree nearby, in which case twice. If you can see a damp patch on the wall, the moment for prevention has already passed and you are paying for a repair rather than a visit.
4 min read
Cleaning solar panels: does it really produce more?
On lightly dusted panels the difference is small — a few per cent, and the first decent rain does much of that by itself. Where it does add up is a caked bottom edge, moss growth or bird droppings: those shade part of the cells, and because cells are wired in series that drags the whole panel down. That is the case in which cleaning pays for itself.
4 min read
Green growth on a facade: where it comes from and what actually helps
Green growth is algae, and algae need only one thing: moisture that lingers. That is why it always starts on the north side, under an overhang or behind a fence. The treatment that works kills the algae and lets the rain wash them off; the one that does not blasts them away and leaves the spores behind — and you are back where you started within eight months.
5 min read
How often should you have your windows cleaned?
For most homes in the Netherlands: every eight weeks. In a city centre or on a busy through road, every four. If your house sits quietly and in the open, three or four times a year is plenty — and anyone selling you more often than your situation calls for is selling you a subscription, not clean windows.
4 min read
Knowledge base
The things we explain most often on the phone, written down. Every article starts with the answer and also says when you do *not* need us — which saves you a phone call and us a quote that was never going anywhere.