Whenever wood has more than 20% moisture exposure it has the potential to deteriorate. It’s very important to keep up on caulking and painting with quality materials to prevent wood rot. If  you are at the point where you already have wood rot we recommend you do not use pine for rot replacement. Pine available on the market today tends to be new growth pine. Pine available today is not as dense as older growth pine and will rot in a very short period of time. So many home owners are so disappointed to find their new homes have extensive wood rot damage within the first five years. Or worse after painting and carpentry work by what seemed to be a good job at the time only to find out  three years later that the wood replaced is already starting to rot again. That’s why most of the carpentry material we use  for rot replacement is PVC or hardwood.  Contact Mike@MasterWorksPainters.com for more info.