A construction element can comprise a top portion, comprising a top portion region and a top portion groove located below the top portion region. The top portion groove can be configured to receive a wall material within the top portion groove. The construction element can also comprise a middle portion coupled to the top portion. The construction element can further comprise a bottom portion coupled to the middle portion and comprising a bottom portion groove configured to receive a floor material within the bottom portion groove, a bottom portion bend coupled to and located below the bottom portion groove, and a bottom portion region coupled to the bottom portion bend. Other embodiments are also provided.

A baseboard element including a nose portion that includes a nose bottom section, a nose top section extending approximately parallel to the nose bottom section, and a nose face section extending between the nose bottom section and the nose top section. The baseboard element also can include a riser portion comprising a riser section extending approximately perpendicular to the nose top section, and a riser bend extending between the riser section and the nose top section of the nose portion. The baseboard section additionally can include a wall groove portion comprising a groove front section extending approximately parallel to the riser section of the riser portion, a groove back section extending approximately parallel to the groove front section, a groove bottom bend extending between the groove front section and the groove back section, and a groove top bend extending between the groove front section and the riser section of the rise portion. Other embodiments are provided.

A system comprises a first baseboard element, a second baseboard element, and a spline configured to couple with the first baseboard element and the second baseboard element. Another system comprises a first crown element, a second crown element, and a spline configured to couple with the first crown element and the second crown element. Other embodiments are disclosed herein.