Repair Methods
Cracks, shakes and fissures 5mm wide and below require injection rather than filling (for the filling of wider cracks see Filling & Dowel Fixing). The injection method uses an epoxy adhesive and may be supplemented with Epoxy Glass Rods, often called 'Dowels', if the defect extends more than 30% through the timber. Consult a Structural Engineer before proceeding.
Clean out cracks with a saw blade and vacuum clean.
Fit hammer-in plastic injectors to 10mm diameter holes. These have
one-way valves inside to prevent resin backflow.
Inject Thixotropic Epoxy Injection Resin, slow set version, using a Syringe.
Once the resin has set the injector head can be cut off, or drilled out and filled.
Syringe in use for resin injection via an Injector
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David Moore, B.A. (Hons.), C.T.I.S., C.R.D.S. Technical Author
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