Why are curtain fabric joins vertical and not horizontal?
Curtain fabric joins are vertical because a vertical join disappears into a fold, while a horizontal join would run straight across the curtain at eye level, catch the light and carry the hanging weight. Speedy Blinds joins curtain fabric vertically only and doesn't offer horizontal joins at all.
It's an appearance and a durability decision. A vertical seam falls into the pleat or wave and becomes almost invisible. A horizontal seam has nowhere to hide, catches light across its whole length, and puts a stress line across the hanging weight of the curtain.
When a curtain needs joins
Where the fabric is wide enough to cover the whole drop, the curtain is made in one continuous piece with no joins. Where the drop is longer than the fabric is wide, the fabric is cut in drops and the widths are joined side by side with vertical seams. That keeps the seams in the folds rather than across the face.
Where the join ends up
Join placement relative to the heading and the folds isn't fully controllable. Fabric width, pattern repeat, the required drop and how the fabric falls all affect it, and we can't guarantee whether a join lands on the front or the back of a fold.
What we do aim for: on centre open curtains, roughly mirrored join positions with the smallest panel on the stack side. On one piece curtains, larger panels on the moving side and the smallest panel on the stack side.
This answer is general information. For your own windows, your retailer's advice and your order with them come first.
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