Grasscloth: the seams and variation to expect

Will the seams in grasscloth show? Yes. Every seam in a natural grasscloth is visible, and adjacent drops can differ in shade. That is the material, not a hanging fault, and it is the reason to look at a whole installed wall, not a sample, before you commit a room to it. The sample shows the fibres. The wall shows how the panels sit beside one another.

Why do the panels look different from one another?

Grasscloth is woven from natural fibres, sisal, raffia, arrowroot, jute and others, dyed and laid on a paper backing. Dye takes unevenly on natural fibre, so colour shifts along a roll and between rolls, and the weave itself is irregular. Once hung, each drop reads as a panel with its own tone, and light crossing the wall exaggerates the difference. Makers describe this as shading or panelling. Phillip Jeffries, whose Tweed we installed at Four Seasons Ten Trinity Square, publishes a clear account of it in The Art of Smooth Shading.

Printed and vinyl imitations of grasscloth remove that variation. If a uniform wall is what you want, compare one; our choosing guide covers that decision.

What is normal, and what is a fault?

Normal: a visible seam line; a step in tone between neighbouring drops; a slightly different texture from one panel to the next; fibres that catch the light at a different angle on alternate drops.

Not normal, and never excused by shading: an open joint you can see the wall through; a seam that has lifted; a dark line or a dull patch from adhesive or water on the face; a shiny, flattened line along a seam where a seam roller has crushed the fibre; drops from two batches on one wall; a narrow sliver at the end of a wall that could have been balanced; a crease, bubble or tear. Phillip Jeffries’ grasscloth instructions say to keep the face free of adhesive, because “both paste and excessive water will change the color”, and to smooth with a plastic smoother: “Do not use a seam roller” (Grandview Grass instructions). These are installation or handling problems and should be reported, not lived with. Our problems and aftercare guide explains what to photograph and what not to touch.

How does the set-out change the result?

The wall widths, the doors and the windows decide where seams land. On a prominent wall, a narrow strip at one end draws the eye more than a balanced arrangement of panels, so the set-out often starts from the visual centre, the chimney breast or the bed wall, and adjusts the end panels so that neither is a sliver. Phillip Jeffries’ Engineering a Room works the same way: start from the centre, balance the cut sizes, and avoid a narrow piece (“a mere 2-inch piece is something to be avoided”).

Phillip Jeffries’ own notes do not agree on where the shading sequence starts. The Art of Smooth Shading (November 2023) says to start at a corner and “always shade darker to lighter”, one wall at a time. Shading Tips for Naturals (November 2025) says to find the centre of each wall, mix light and dark drops, “Don’t start in a corner”, and shade the bolts before anything is pasted. Both are one experienced installer’s method, not a rule for every product. What they share is the useful part: shade the cut drops dry, one wall at a time, hang three and stop to look. The direction of the weave is agreed before the first length is cut; it is part of how we install grasscloth.

Should alternate drops be reversed? Sometimes, and only after trying it. In The Art of Smooth Shading, Phillip Jeffries’ master installer describes reversing as “a go-to tip that he always tries”: the second drop is turned so its bottom becomes the top and like edges meet, because shade tends to run across a sheet of grasscloth. The article suggests giving it a try; it does not say it always works. The maker’s product instructions are more cautious. The Grandview Grass instruction says the installer “may reverse strips if they feel that it will produce the most even shading”. The Tweed instruction says hanging in the same direction, without reversing, “has produced the most even shading”, and leaves the final decision to the installer. Other products, and other makers, rule reversing in or out on their own sheets. Follow the hanging instruction for the exact product, which for Phillip Jeffries is on their hanging instructions page, and judge the first two or three drops in the room’s own light before the rest goes up.

Why does the batch matter so much?

Variation between batches is larger than variation within one. Order the whole room, with a spare, from one batch number, and keep lengths from the same roll together on the same wall where the design of the room allows. Quantities for grasscloth allow for that, and for the fact that offcuts rarely blend. Our quantities page explains why drops, not square metres, decide the order.

Will it cope with the room?

Natural grasscloth is a dry-dust surface. Moisture stains it, adhesive on the face marks it, and it is not suited to frequent wiping or splashes. In a busy family hall or beside a kitchen, a textured vinyl may be the better answer if cleanability matters more than natural fibre. The wall beneath it also matters: a sound, true, evenly porous surface, lined where the maker specifies it, because grasscloth telegraphs a poor substrate less than silk but hides nothing that is proud of the surface. See wall preparation.

When does this advice stop being reliable?

This guide describes natural grasscloth in general. Paper-backed, non-woven-backed and vinyl-backed weaves behave differently, and so do the adhesives they need. The product’s own hanging instruction and care sheet take precedence over anything here. If you like the texture but dislike the panel character, change the specification now; it is a much better moment than after the room is finished.