I have an old house, about 180yrs old, which is stone built with wood beam lintels above the windows. We are in the process of selling it and making good some of the bits that were left from a very slow renovation. One of the jobs was to box up the wooden lintels above the kitchen window and plaster, This window was left when the rest of the kitchen was plastered as we found that one end of the first beam (3 beams in total for the depth of the window) had been eaten away by woodworm. This was fixed up after clearing it out, the woodwrom damage seemed to be old and the rest of the first beam looked ok. Yesterday I went to nail up some plaster board over the old plaster to the underside and found nothing solid behind the old plaster. After pulling off the old plaster I saw that the other two beams had also been eaten away and were a real mess. The surveyer is coming tomorrow for a full structeral and is going to have a field day with this. What are the options for repairing this?. Is there no other way other than chopping out the wood and replacing with new timbers/modern lintel, has anyone else had similar problems or had to replace old wooden beam lintels?