gap beneath the double doors preventing drafts light odors and noise from traveling between adjoining rooms the central portion 20 of the carpet threshold 10 has an upper surface 20 a which extends laterally outward from an imaginary longitudinally extending central plane upper surface 20 a is generally flat and smooth central portion 20 is extra wide to span the distance between the double doors enabling the carpet threshold 10 to extend the entire width of the doorway the outer edges of central portion 20 taper slightly downward for guiding the bottom edges of the double doors onto the upper surface 20 a of central portion 20 as the doors are put in the shut position second carpet edges that are taped together or glued across the doorway threshold tend to fray and the joint tends to weaken this problem is eliminated because opposing receiving cavities 30 located on opposite sides of central portion 20 and extending from the outer edges of the central portion receive the carpet edges and prevent fraying referring now to fig2 receiving wings 40 extend outwardly relative to the central plane and laterally from opposite sides of the lower portions of the central portion 20 for receiving a carpet tack strip and a portion of the carpet pad beneath the carpet the width of receiving wings 40 may vary according to application but must.