Variable height interlocking moulding strip for flooring

An adjustable height transition moulding that is mountable in a base track having an upwardly-opening channel portion, said transition moulding being formed of resiliently flexible material and comprising:

• an elongate cap portion having first and second laterally extending flange portions for covering edges of floor coverings adjacent said base track;
• a depending, substantially flat wall portion that extends downwardly from said cap portion generally beneath a junction between said first and second flange portions;
• a downwardly-pointed non-detachable rib portion formed along a lower edge of said depending wall portion, said non-detachable rib portion comprising:
• first and second outwardly extending, substantially horizontal upper surfaces on opposite sides of said wall portion;
• and
• first and second outwardly extending, upwardly-sloped lower wall surfaces on opposite sides of said wall portion, that meet said upper surfaces at first and second pointed edges of said non-detachable rib portion;
• a depending, substantially flat web portion that extends downwardly from a lower edge of said non-detachable rib portion, said web portion being thinner than said wall portion and extending in generally vertical alignment therewith;
• and
• a plurality of downwardly-pointed detachable rib portions formed at vertically spaced locations on said web portion, said detachable rib portions each comprising:
• first and second upwardly sloped upper surfaces extending outwardly on opposite sides of said web portion;
• first and second upwardly sloped lower surfaces extending outwardly on opposite sides of said web portion;
• and
• first and second substantially flat outer edge surfaces extending generally vertically between said sloped upper and lower surfaces;
• said sloped upper surfaces extending at shallower, generally more horizontal angles and said sloped lower surfaces extending at steeper, generally more vertical angles, so that said detachable rib portions taper from relatively thin and more flexible outer edges to relatively thicker and more rigid bases where said detachable rib portions are joined to said web portion;
• said detachable rib portions being spaced apart vertically so as to form gaps intermediate said detachable rib portions in which vertical sides of said depending web portion are exposed, said gaps being sized sufficiently large to admit an edge of a blade therein so as to form a cut in one of said vertical sides of said web portion;
• so that an installed height of said transition moulding is adjustable by inserting a blade into a selected one of said gaps intermediate said detachable rib portions so as to form a cut in said web portion rein and then extending said cut so as to remove one or more of said detachable rib portions that are located below said selected one of said gaps.