Fusible on back of blocks
 

I saw a video by Jenny Doan about a crumb quilt, so I set about making one to diminish my scrap bin. I have almost enough blocks done to make a quilt, so before I put it together, I have a question for the LAers out there
Because there are so many seam lines, I thought about putting light weight fusible on the backs of the blocks, to help stabilize it. So, my question is: if I do that, will it cause any issues with getting quilted? Too dense for the needle to go through? Gumming up the needle? Making it too heavy?
One other question I just thought of: do I use the batting as usual?

I think it's a great idea & it will help the seams from pulling apart. They even make something like this for machine embroidery. As far as thickness, T-shirt quilts have a backing on them and I've never had an issue quilting through all the layers. If you're concerned, you might try a thinner batting.

It could create a lump where the seams are. Test it first.

Many show quilt makers put fusible on the back of the quilt tops.

Thank you for your replies. Sometimes, I think something would work, but doesn't turn out like I thought it would. Good to know that my thinking on this are actually workable

I've put stabilizer behind clothing for memory quilts and it wasn't a problem. I used Shape Flex, which is a woven stabilizer.

I have used ultra light weight fusible as the foundation for string and crazy quilt blocks. My LA'r has never complained.

If I were doing a test block I’d try French fuse interfacing. Extremely light and easily quilted.

Thank you for your replies. I had not heard of Shape Flex, or the French Fuse, so at least now I have an idea of what to look for.