Patent ID: 7520092

Claim:
A plastic panel assembly formed by at least first and second plastic boards secured at an interlocked joint of said first and second boards, each of said boards having a construction comprising a main body portion with a top surface, a bottom surface, a first edge region and a second edge region, said first edge region having a top surface which is a continuation of the top surface of the main body portion and also having a first locking part, said second edge region having a bottom surface which is a continuation of the bottom surface of the main body portion and also having a second locking part, said interlocked joint being formed by engagement of said first locking part of said first edge region of the first board with said second locking part of said second edge region of said second board, said assembly including both a moisture drainage channel and a mechanical fastener receiving surface which are separated from one another at said interlocked joint, said top surface of each of said first and second boards having a plurality of water drainage channels spaced from one another extending axially of said first and second boards in said top surface, said top surface also including a plurality of feed channels which are angled relative to and which intersect with said drainage channels penetrating to a depth at least as great as that of said feed channels into said top surface of said first and second boards, at least some of said feed channels extend from side to side across said first and second boards, at least some of said feed channels intersect with all of said drainage channels, said feed channels include a set of first feed channels extending in a first direction across said top surface of said first and second boards and a second set of feed channels extending in a second direction across said top surface of said first and second boards, at least some of said first feed channels intersecting with at least some of said second feed channels in said to surface of said first and second boards said first and second feed channels form a diamond pattern in said to surface of said first and second boards, and said first and second boards includes a plurality of raised grip ribs extending axially of said first and second boards between said drainage channels.