Injection Resins - for direct injection
Inject resins without using hammer in Injectors
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Crack Filling in Wood and Masonry - structural repair with Injection Resin
How to fill Cracks and Splits - summary
1. Grind or cut out the crack to make a clean slot at least 15mm x 15mm in section.
2. Remove all dust by brush or vacuum.
4. Drill a 6 to 10mm diameter hole through the filled crack face, when the resin is hard. Remove all dust by vacuum.
Only requires a normal Skeleton Gun.
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How to choose a crack repair method and material
General principle - cut out the cracks with a saw, Router, masonry grinder, or Allsaw, to form square edged slots, and remove all dust and debris. Avoid V shaped slots - the repair will be much weaker.
Repair Thickness - the more material that we can put in to the repair, in terms of width and depth, the better it will be able to accommodate natural movements caused by changing temperatures and therefore the better it will last.
Injection - inject Epoxy to repair the split behind the filler. Continue until the resin comes out of the next hole.
Caution - Always consult a Structural Engineer and the building's Insurers before proceeding.
Crack Injection - into hollow render
To treat delamination or hollowness, drill a 5mm - 10mm diameter hole into the crack every 100mm to the depth of the separation between layers. (hollow area). Inject Epoxy Primer or Thixotropic Injection Resin until it exudes from the next hole. Test for hollowness with a plastic hammer until the delaminated areas cease to sound hollow.
Injecting cracks in masonry using a syringe. Syringes - in 10cc, 20cc and 50cc sizes.
Epoxy Primer Consolidator - available in 500cc and 1 litre, two pot, liquids.
Thixotropic Epoxy Injection Resin. Injection using a standard 400cc Cartridge.
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Site written by: David Moore
David Moore, B.A. (Hons.), C.T.I.S., C.R.D.S. Technical Author