Staircase and method for construction

A staircase comprising:

• a first staircase stringer, the first staircase stringer comprising a plurality of riser channels, each of the plurality of riser channels comprising a channel width sufficient to encompass the thickness of a sub-riser and a capping riser in each of the plurality of riser channels;
• the first staircase stringer further comprising a plurality of tread channels, each of the plurality of tread channels comprising a channel width sufficient to encompass the thickness of a sub-tread and a capping tread in each of the plurality of tread channels;
• a second staircase stringer, the second staircase stringer comprising a plurality of riser channels, each of the plurality of riser channels comprising a channel width sufficient to encompass the thickness of the sub-riser and the capping riser in each of the plurality of riser channels;
• the second staircase stringer further comprising a plurality of tread channels, each of the plurality of tread channels comprising a channel width sufficient to encompass the thickness of a sub-tread and a capping tread in each of the plurality of tread channels;
• the staircase further comprising sub-risers and sub-treads fixed in the corresponding riser and tread channels of the first and second stringers in a first procedure to form a staircase comprising the first and second stringers assembled together with the sub-risers and sub-treads;
• and
• the staircase further comprising capping risers and capping treads dimensioned to be installed over the sub-risers and sub-tread in a second procedure.

A staircase kit comprising:

• a first staircase stringer, the first staircase stringer comprising a plurality of riser channels, each of the plurality of riser channels comprising a channel width sufficient to encompass the thickness of a sub-riser and a capping riser in each of the plurality of riser channels;
• the first staircase stringer further comprising a plurality of tread channels, each of the plurality of tread channels comprising a channel width sufficient to encompass the thickness of a sub-tread and a capping tread in each of the plurality of tread channels;
• a second staircase stringer, the second staircase stringer comprising a plurality of riser channels, each of the plurality of riser channels comprising a channel width sufficient to encompass the thickness of the sub-riser and the capping riser in each of the plurality of riser channels;
• the second staircase stringer further comprising a plurality of tread channels, each of the plurality of tread channels comprising a channel width sufficient to encompass the thickness of a sub-tread and a capping tread in each of the plurality of tread channels;
• the staircase kit further comprising sub-risers and sub-treads for fixing in the corresponding riser and tread channels of the first and second stringers in a first procedure thereby forming a staircase comprising the first and second stringers assembled together with the sub-risers and sub-treads;
• and
• the staircase kit further comprising capping risers and capping treads dimensioned for applying to the sub-risers and sub-tread in a second procedure.