Crack Filling in Wood - structural repair with Epoxy Primer and Epoxy Mouldable Putty
How to fill Cracks and Holes - summary
1. Clean out the crack or hole with a saw blade, jigsaw or chisel to at least 10mm x 10mm in section.
2. Remove all dust by brush or vacuum.
3. Prime with Epoxy Primer using a brush and place Mouldable Epoxy Putty or, for bigger holes on the top face, pour in Structural Epoxy Pouring Resin, which is self leveling.
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How to choose a crack repair method and material
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.
Caution - Always consult a Structural Engineer and the building's Insurers before proceeding.
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Fine to medium cracks - hairline to 15mm wide.
Clean out - to at least 10mm x 10mm
Apply Epoxy Primer liquid by brush and whilst tacky lay in the putty-like repair mortar, Mouldable Epoxy Putty.
Epoxy Primer - available in 500cc and 1 litre, two pot, liquids.
Mouldable Epoxy Putty - available in 500cc and 1 litre, two pot, putties.
Slot correctly cut out, square shouldered, dust blown out, ready to Prime and Fill. Mixing. Fill cracks and inject Epoxy.
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Larger holes and cracks - over 15mm wide
Cut out to - 20mm plus in width - you can fill holes of any size in a single pour.
Pour or inject Structural Epoxy Pouring Resin.
Structural Pouring Resin - available in 1 litre, 2.5 litre and 7.5 litre packs, containing two liquids and a powder.
Shutter Box and dug out timber. Pouring Structural Pouring Resin. Small Joist Repair.
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For cosmetic matching of colour or texture - you can add your own Site dust or chippings to the surface, (or ask for our Mortar Colour
Powder), which you can mix into Mouldable Epoxy Putty, used as a surfacing finish.
Apply Epoxy Primer liquid by brush and whilst tacky lay in the putty-like repair mortar, Mouldable Epoxy Putty.
Epoxy Primer - available in 500cc and 1 litre, two pot, liquids.
Mouldable Epoxy Putty - available in 500cc and 1 litre, two pot, putties..
Mixing Mouldable Epoxy Putty in the gloved hand.
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Timber Stitching - wood stitching with epoxy rods and epoxy resin
Epoxy resin injection method
1. Cut out the cracks and shakes until clean.
2. Remove all debris and dust.
3. Apply Epoxy Primer liquid by brush and whilst tacky ram in the putty-like repair mortar, Mouldable Epoxy Putty.
4. Allow the Putty to harden and then drill holes across the plane of the crack, without piercing the far side of the beam.
5. Inject Thixotropic Epoxy Resin or Thixo Rapid One Pack Resin and insert the epoxy/glass rod into the resin. Push the rod inwards, twisting it gently.
Always consult a Structural Engineer and the building's Insurers before proceeding.
Thixotropic Epoxy Injection Resin - this is available in 400cc packs with cartridge kits, for easy use in a standard skeleton gun.
Thixotropic Epoxy Injection Resin - available in 400cc, two pot, with cartridge kit.
Thixo Rapid Injection Resin - available in 280cc, single tube, fits standard skeleton guns.
Epoxy-Glass Rod - available in 6, 8, 10, 12, 16mm diameters x 1 metre lengths.
Thixotropic Injection Resin, Epoxy-Glass Bars, 400cc Skeleton Gun
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Site written by: David Moore
David Moore, B.A. (Hons.), C.T.I.S., C.R.D.S. Technical Author
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Other Property Repair Systems Sites:
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www.fire-door-paint.co.uk - upgrade doors to 30 minutes fire resistance
www.joist-repair.co.uk - how to quickly repair joists and beams of any size
www.propertyrepairsystems.co.uk - our Home Site
www.steel-fire-paint.co.uk - treat steel with Intumescent Paint to provide fire protection
www.timber.org.uk - systems of repair, with step by step methods
www.timber-repair.co.uk - how to repair timber beams