Saints moved to within a point of Caley thanks to Steven MacLean's late header, coming after David Raven saw red for the visitors after just 12 minutes.
"It was a great result," he said. "It keeps us in there fighting.
"It is always difficult against 10 men but even more so on that pitch.
"To be fair the ball spends more time bouncing up at your knees than it does on the ground.
"It is almost impossible on that pitch to play with any sort of quality but the lads kept plugging away and on chances probably merited the win."