Lining already-made curtains
 

I made a short curtain (valance?) for my kitchen window but it's bugging me that when the sun shines in the window, I can see the seams. What would be the best and easiest way to add a thin lining to it? It has a rod pocket and looks like this:
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I would take it down and add another layer like a petticoat. Just hem a piece of fabric about an inch shorter than your valance and stitch it to the bottom line of stiching that makes your hanging pocket. Cute curtain by the way.

Yep, what tesspug said, I did a whole set for my daughter that way.

I'd do exactly as TessPug suggested. Another reason to line curtains is so they don't become sun-bleached, too. I took down the curtains from our brand new trailer and will be lining those, both because of sun, and for privacy. They last much longer that way.

Thanks everyone. I might make them longer than 1" short (the yellow has a narrow hem-I didn't want to double it because some I've seen like that don't seem to 'ruffle' as nicely) but that sounds like the best idea.

Get a tension rod put it up behind your rod; make a straight strip of fabric to hang on it behind your curtain. Less fabric, less hassle, no bulk. Also make it out of sun block fabric, no hem, it will not fray.
The next time you make them, railroad the fabric. [Cut the legend of the bolt instead of cross wise, no seams.]

I didn't have enough to cut it lengthwise and didn't want to buy new fabric just for this project. Even if I did I'm not sure I'd want to spend $20+ for each one (it's about 76" wide). Good idea about using a 2nd tension rod. I have one on hand so I can give that a try.

eta: the seam that shows is actually between the green strip and the fabric next to it. The seam up the center doesn't really show since it's gathered.

I just finished up some quilted cafe curtains for the bedroom and I just made a pillowcase out of it with natural colored muslin. My one window faces west and that's a sunny window! I sewed on the three sides, turned it right side out and ironed it, and then tied it down with embroidery thread cut relatively close. Turned out sweet and I learned that from the mother who did a whole picture window valance in the Log Cabin pattern and actually used a plaid flannel for the backing. It looked nice from inside/outside! Good luck!!! Edie

I might suggest that you use a dark colour fabric for the lining as the sun can still get through (ask me how I know that). I have the same problem & I used a white colour & the sun still came through. Sun block fabric would certainly solve the problem.

if you're looking for a quick fix, iron on fusible