Gasket sealing arrangements

An architectural joint system comprising:

• a first substrate having a lateral end surface extending axially outward to an outer surface;
• a second substrate having a lateral end surface facing the lateral end surface of the first substrate and extending axially outward to an outer surface;
• and
• an expansion joint compressed between the first substrate and the second substrate, the expansion joint comprising:
• a foam strip having first and second lateral side surfaces extending axially outward to an outer edge surface recessed from the outer surfaces of the first and second substrates, the first lateral side surface engaging the lateral end surface of the first substrate and the second lateral side surface engaging the lateral end surface of the second substrate;
• and
• an elongated gasket having a laterally expandable portion adhered to the outer edge surface of the foam strip and extending between first and second lateral end portions, the first lateral end portion being bonded to the first substrate at a location spaced apart axially outward from the first lateral side surface and the second lateral end portion being bonded to the second substrate at a location spaced apart axially outward from the second lateral side surface.

A method of installing an expansion joint between first and second substrates having opposed lateral end surfaces extending axially outward to outer surfaces, the method comprising:

• installing a pre-compressed foam strip between the first and second substrates, such that a first lateral side surface of the foam strip engages the lateral end surface of the first substrate, a second lateral side surface of the foam strip engages the lateral end surface of the second substrate, and an outer edge surface of the foam strip is recessed from the outer surfaces of the first and second substrates;
• providing an elongated gasket having a laterally expandable portion extending between first and second lateral end portions;
• adhering the laterally expandable portion of the elongated gasket to the outer edge surface of the foam strip;
• adhering the first lateral end portion of the elongated gasket to the first substrate;
• and
• adhering the second lateral end portion of the elongated gasket to the second substrate.