Deck Size and Protection Calculator

Use this calculator to estimate how many lineal feet of Imus Seal Butyl Joist Tape your deck will need.

Deck Size and Protection Calculator

Example Deck 1
16' x 24' deck frame

Depth: 16 ft.
Length: 24 ft.
Joist Span: 16 in.
Deck Size: 384 sq. ft.
Protection Needed: 328 ft.

Example Deck 2
20' x 48' deck frame

Depth: 20 ft.
Length: 48 ft.
Joist Span: 16 in.
Deck Size: 960 sq. ft.
Protection Needed: 788 ft.

Note: Calculation includes deck joists and facia but does not account for girder beams, ledger, or additional blocking.