You can see how this is coming together. I'm working on the back sections now. There will be three pieces for this; a short one that fits across the front, and a matching back piece that hangs to the floor. These two pieces will be connected by a narrow gusset that will run the length of the top back. That's the plan anyway. Will see how it goes.
I'm just measuring and making templates as I go along. Used recycled brown packaging paper, taped it together to get the length I needed and then traced the backrest curves by turning the chaise over onto the paper. (Paper taped to the wall behind the backrest also works, but my wall wasn't long enough so we improvised.)
This is what I ended up with for the backrest; this piece faces towards the front. I like to add length to the parts that can be tucked into creases. It adds slack, minimizing stress on the seams when you sit on it. And if there's shrinkage I'm fairly safe. It is recommended that most fabrics be pre-washed before cutting, but I really find that hard to do, often with so many yards of it, so I choose to do it this way, say a prayer and keep my fingers crossed. So far, so good. I should also say that, this post is not meant to be a tutorial, it's just something I'm showing in a conversational way, because sewing slipcovers isn't necessarily quick nor easy, and I don't want to give that impression. The best advice I can give anyone is to study a number of books on the subject. Realize too, that directions will be approximate due to furniture styles, shapes, and structural variations. But the basic construction steps are the same. If your piece has clean, straight lines it shouldn't be too difficult. You can always start with a kitchen chair or ottoman to get your tootsies wet. (baby steps!)
So...a few books I've used in the past and can recommend: Decorating with Fabric (1986) has a short chapter on slipcovers, with fairly good directions and diagrams that cover the basics. (This was the book I used to make my first slip-cover for an old sofa bed.) Check your library for it. Also, Slipcover Magic (1995) which is more comprehensive with lots of styles and projects. For inspiration, I like Simple Soft Furnishings (2004). There are a few simple slipcover projects too that look pretty easy for a beginner. To answer another question, I'm using a medium upholstery weight 60"width cotton twill on the chaise. I prefer this for bedroom chairs and light slipcovers. For more durability, on a sofa for instance, I really like natural cotton duck which is heavier. Both of these fabrics are inexpensive and easy to work with. Check out this website. I just noticed that some of the fabrics can even be purchased pre-washed, which I'm taking note of myself for future reference.
OK, that's it for now. Time to get back to the ship before I lose momentum.
Oh and one more thing (unrelated), no postal service on President's Day; patterns and other packages will ship out Tuesday.