I need 3 blackout roller blinds for my childrens bedroom. I've used the Ikea ones in another room but they are 15cm too short for this room. I've looked online for others but all the ready mades go up to about 180cm or 200cm and I need a drop of 210cm. Obviously blackouts don't really work if you dont have them long enough! Custom made are a fortune.
I know you can blind kits online but I would still need to buy fabric and stiffener and they wouldnt be blackout.
Is there any way I could join a piece onto the Ikea ones? They are only £12 so it would be cheap to buy an extra one and add bits onto the other 3. But would I need to sew it or glue it? And how would i cover the join so it didnt look terrible? And should I add the piece at the bottom or the top? And would the join impede the roller mechanism?