The options for replacing roof joists are the repair of the beam with timber resin materials repairing using specialist repair plates or where extensive damage is present the removal and replacement of the entire joist and truss.
Repairing roof timbers.
Resin repair with tie bars and injected resin can solve this problem.
Also the rafters that spanned the full width of the mono pitch shed were rotten at the lower end.
As the roof covering was removed the state of the rafters was revealed.
Repairing damaged roof timbers.
Beetle infestation timber decay poorly executed alterations and undersized rafters are common problems.
These tend to be eaten away by woodworm and the roof beams then move opening up the joints.
Fragments of rotten timber and roof felt.
This method can even be used for repairing flag poles.
Older roof timbers were connected with mortise and tenon joints plus wooden pegs.
The emphasis of the article is on repair and reinforcement options including the use of scarf repairs stainless steel flitch plates and the use of resins.
Corbel conservation s robin russell provides an introduction to structural timber repairs in historic buildings.
It became apparent that about half of the pine boards forming the roof deck were damaged beyond repair.
The article concludes with a section outlining approaches to the problem of roof spread.
Remove weak spongy wood preserve and protect wood wi.
These are compounded when a roof covering is replaced with a heavier material such as concrete tiles.
Where serious problems are suspected call in a surveyor or structural engineer.