Carpet tile continues to gain traction as a flooring solution, and Interface (NASDAQ: TILE) is cashing in on the trend. The modular carpeting specialist posted financial results after Wednesday's market close, checking in with net sales rising 8.8% to hit $240.6 million in the first quarter.Interface's top-line growth is decelerating from the 11.1% uptick it posted last time out, but that doesn't make this a disappointing performance.