Why Do Louvered Roof Side Screen Fabrics Ripple?

Our louvered roof pergola side screen fabrics are high-performance materials designed to provide both a functional and decorative role, however, despite meeting the highest European standards and laboratory tests, they can only be manufactured to a limited degree of perfection even with today’s state of the art machinery.

Waviness and rippling occurs both around the seams (where the panels of fabric are joined horizontally every 2.5m) and along the side hems (where the fabric is locked into side guides) due to the arrangement of the made-up screen fabric, with double layers/thicknesses of material where the fabric is joined (seams) and where it is held in the side guides. This results in the fabric assuming two different diameters around the rollertube.

The tension the fabric is under causes the areas where there are double thicknesses of material (seams, sides) to press down harder on each other resulting in waviness and rippling immediately adjacent to the seams/sides. This effect also occurs in the centre of the panel when louvered roof side screens are used in windy conditions.

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