In the past, trellises were mainly used for cultivating grapes or fruit. For bigger and better harvests the trellises were often very large, some even covering the entire façade. And after all, one large trellis is more impressive than several small ones. How then do you place the cross bars and laths? Which designs are possible? This page conveys basic knowledge by using examples. With these you can even plan a trellis. You can find further information on other pages in the area "Classic Trellises"
A Trellis has to adapt to the windows of a façade. The simplest solution is to use long cross bars and only shorten laths at the specific areas. The down side is that the cross bars end up coming very close to the windows. With high windows, the cross bars are farther apart and the laths cross sections have to be larger, making them less delicate looking. Long cross bars and laths are often pieced together as described under "Detail".
For functional or design reasons, it may be necessary to add cross bars not only above and beneath, but also between windows. A continuous cross bar is not possible, so instead you add short bars on the same height. It can even be reasonable to "fragment" cross bars above and below windows instead of using a continuous cross bar. The trellis may not have one border or a frame, but it seems looser.
For several reasons it can be useful to add short crossbars, especially underneath windows. If possible, several of these bars should be arranged at the same height, so that they make a imaginary cross bar axis. Sometimes these cross bars do not need wall anchorage. They are simply screwed to the vertical laths.
Planning complex trellises is a challenge! Sometimes, such projects can be separated into individual trellises, for example, 2-bar-trellises. These should have some distance to one another, and the axes should match. The results are often unconvincing.