You're not done until the patch details are finished.

Cut corner patches so they overlap the continuous membrane that comes up from the deck. Ensure the overlap is about 1-1/2".

Once you have installed the TileDeck to the substrate you have to apply contact cement all around the column walls where the membrane will go.

The woven polyester backing on the patch has to be removed before welding. In addition, the fuzz on the deck membrane has to be removed where the patch will overlap.

Be very careful not to get contact cement on the membrane anywhere there is an overlap to be welded.

It will cause problems for the weld and prevent proper melding together of the sheets and it burns and looks terrible.

Notice how the corner patches are carefully cut, sized and fitted to come right down for the appropriate overlap at the corner.

The deck membrane is cut at a 45 degree angle so the corner of the column is its lowest height. This is the most critical area of the patch detail.