When & Why to Use English Bump Interlining for Custom Window Treatments

English Bump Interlining, per its name, is made in England.  It is a woven cotton; it is heavy and has been used in England for years as an interlining inside drapes to keep the cold air out of homes and keep them warmer.

As the name implies, English Bump is an old-style material that was used in the cold damp winters of England to keep homes warm.

Most people are unaware that, according to the US Department of Energy about 25-30% of their home’s energy is lost through their windows. Installing Custom Drapes with a heavy-weight cotton flannel interlining can reduce the loss of heat by 25% in the winter and reduce heat gain in the summer by up to 33%.

When choosing an interlining material, you should use a 100% cotton flannel material which will provide great insulation plus an added sound barrier.   English Bump Interlining is about twice the thickness of flannel interlining.

We at CWT have been sewing with English Bump Interlining for over 25 years.  It plays well with silk and cottons and any face fabric. It is very heavy and when properly sewn in results in the drape having an amazing hand.

It’s not just for colder climates.  Many designers use it to give a more luxurious hand to drapes for their customers.

Until we Meet Again!

CWT