Cornice boards and Lambrequins save on heating costs

Several years ago our Public Service company sent out a flyer attached to their bill showing a picture of a cornice board with a dust cover.  They said the dust cover (the top board on the cornice) prevented air circulation behind the drapes and thus prevented drafts around your windows.  A further reduction in airflow could be achieved with the use of a Lambrequin which has side pieces that can extend to the bottom of your window sill or even to the floor.

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