by Diva Els
There are several ways to prevent a vent from tearing. For example, sewing an arrowhead or using the bar from a hook and eye set. I prefer to use a piece of lining fabric which is sewn to the seam allowance of the vent. It is invisible, does not add weight and can be sewn by machine.
Mark the beginning of the vent , and cut or tear a piece of straight grain lining fabric about 4-5 cm wide and 13 cm long.
Turn under and press 1-1,5 cm seam allowances on both long sides. Pin the lining piece to the seam allowances only , just 2 mm below the chalk line which marks the vent opening. The finished width of the strip is 2 cm. The ends of the strips are trimmed with pinking shears to prevent ravelling.
Turn under the ends of the lining strip, as shown below.
Attach the lining fabric by sewing it around , starting at the seam allowance edge. Stitch to the vent allowance only.