What is a schampgoot (board gutter)?
A schampgoot is a simple gutter found in the Netherlands and Flanders. It is formed by a board fixed at right angles to the roof boarding. Rainwater runs down the roof slope, is stopped by this upright board and is led to the downpipe. The roof surface itself forms the bottom of the gutter. Historically pine, spruce or oak was used; today a durable hardwood is the better choice.
The board is fixed with angle irons and supported by timber blocks or iron brackets. It can sit right at the eaves or a little higher up the slope. Its underside is sometimes moulded. To make it watertight, the gutter is lined with lead, zinc or copper.
The name comes from the Dutch verb schampen: to graze or barely touch.
Application
Board gutters are used mainly in restoration work, for example on churches and listed buildings with large overhanging eaves that originally had no gutter at all. A box gutter or hung gutter would often spoil the historic appearance, but some form of gutter is still wanted so that rainwater does not stream down the facade.
Points to watch:
- Lining: copper is often preferred over lead, because long runs of lead can crack, especially on the hot south side.
- Limited capacity: a board gutter holds little water and can overflow in heavy rain; detail the wall and plinth accordingly.
- Fall: around 2 cm per metre improves flow, but on long runs the slope can become visible.
- Maintenance: keep it clear of leaves and moss; standing water against timber speeds up rot.
On listed buildings, altering the roof drainage usually requires consent from the heritage authority, so check before you start.
Related Terms
- Gutter
- Box gutter
- Eaves
- Roof overhang
- Downpipe
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