Epoxy resin can be used for all sorts of repairs, including rotten wood around the house.

From systemthreeresins

 This video shows from start to finish the repair of rotted endbeams on a house using the EndRot system.
REMOVE weak, spongy wood
PRESERVE and protect wood with borate preservatives to kill fungus and rot
SEAL damaged wood with RotFix
REBUILD wood with SculpWood Putty and Paste

The advanced portions of this beam repair refer to the re-bar reinforcement and building forms to shape the beams.
Helping You Put It All Together