Caulking compound backstop for window structures

Claim 1

A BUILDING STRUCTURE COMPRISING A WALL STRUCTURE FORMED TO DEFINE A WINDOW OPENING, A WINDOW FRAME MOUNTED IN SAID OPENING AND INCLUDING SPACED JAMB MEMBERS POSITIONED IN SAID OPENING TO DEFINE A TOLERANCE GAP BETWEEN THE RESPECTIVE JAMB MEMBERS AND THE ADJACENT VERTICAL SIDES OF THE WINDOW OPENING, A CAULKING COMPOUND BACKSTOP MOUNTED IN EACH OF SAID GAPS, SAID CAULKING COMPOUND BACKSTOP EACH COMPRISING AN ELONGATED TUBULAR MEMBER FORMED FROM RESILIENT MATERIAL AND SPLIT LENGTHWISE THEREOF, WITH ITS SPLIT EDGES OVERLAPPING TO RENDER SAID ELONGATE MEMBER COMPRESSIBLE TRANSVERSELY THEREOF, SAID MEMBERS IN THEIR FREE AND UNSTRESSED CONDITIONS HAVING A TRANSVERSE DIMENSION WHICH RESPECTIVELY REQUIRE SAME TO BE COMPRESSED TRANSVERSELY THEREOF WHEN INSERTED IN THE RESPECTIVE GAPS, SAID BACKSTOPS EACH BEING POSITIONED INWARDLY OF THE OUTWARDLY FACING SIDE OF THE RESPECTIVE GAPS, AND A CAULKING COMPOUND MASS FILLING SAID GAPS BETWEEN THE RESPECTIVE BACKSTOPS THEREOF AND THE OUTWARDLY FACING SIDES OF THE RESPECTIVE GAPS LENGTHWISE OF THE RESPECTIVE JAMBS.