When tailoring using bulky fabrics like wool, heavier interfacing is generally required to better support these heavier-weight fabrics.
The top collar or upper collar, an under collar or collar facing, and an interfacing piece that's sandwiched in between.
When using woven interfacing, cut the pieces using the grainline direction shown on the pattern.
Trim away all interfacing seam allowances around the perimeter of the collar.
* 1/3 yard of lightweight fusible interfacing (interior pockets)
* 1 yard of medium-weight fusible interfacing (flap & bow)
* 1/4" yard of heavyweight sew-in interfacing (main panel)
From the corresponding interfacing, cut one interior pocket, two flaps, one bow and one main panel.
In most cases, the pattern guidesheet provides instruction as to the appropriate areas to interface, but begin with those garment areas if an interfacing layout is unavailable.
There are many different interfacing types, weaves and weights available.
When deciding between sew-in or fusible interfacing, consider a few important factors.
However, there are a few cases where fusible interfacing isn't suitable.