Mo, no termites but I hear they are coming. There are a number of issues with using sapwood, mainly it rots quickly if exposed to the weather. It also grows mold if the conditions are right, a number of bugs will get into it if it is left with the bark on for long. I find it much more challenging to find timber that is sapwood free than dealing with the cons listed above. Don't get me wrong heartwood has its place, sills come to mind but if you are looking at a timber within the inner workings of a building I find it safe. Termites could have a persuading effect though.
Tim
