Foundation termite tube on the house can be the surest signs of termites. I can spot those things from the road while driving (safely). So besides this obvious sign what else do you look for:

Baseboard – I hold up my first 3 fingers like the Boy Scout sign, now mush them together. The wood being eaten from the inside buckles, after the termites are gone the wood will dry out and actually get worse. Yes it’s time to replace baseboard. If you find damage here check outside as there is probably a Foundation termite tube.

Down tubes – can appear anywhere and drop from any ceiling. Typically on a one story house – the ceiling. 2 story home again usually the ceiling first floor, why you ask. When Subterranean termites hit the ceiling wood beams there is generally a header and they follow the grain of the wood. Usually I find termites on the 1st floor ceiling rather the 2nd floor ceiling.