Wood Injection via Injectors

Kill Death Watch Beetle and House Longhorm Beetle using Injectors

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Kill Insects inside wood using Injectors - for timbers over 50mm thick

Injectors - fitted with one-way valves which allow Timber Paste to be forced into the tunnels and chambers where the insects are active - the only effective way to reach Death Watch Beetle and House Longhorn Beetle.

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For injection of wood a 10mm diameter x 40mm long hole is required, for flush fitting.

Injector for banging into wood

A one-way valve is fitted inside to prevent back flow.

(Nail Varnish optional)

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Removing Injectors to finish a surface, after injection for insect attack

If you wish to pull out the injectors with pliers after injection do not bang them all the way in: leave about 15mm protruding from the surface. Otherwise, they can be drilled out and then filled to match the surface by;

1. Using our Mouldable Epoxy Putty - this can be tinted using our Colouring Powder.

Mouldable Epoxy Putty for filling holes after removing injectors

Mixing Mouldable Epoxy Putty.

2. Using our Plastic DPC Plugs - tapered fit, flat topped, hollow, available in dark brown, red brick or limestone colours.

DPC Plastic Plugs for filling holes after removing injectors

DPC Plastic Plugs to fill 10mm - 12mm holes.


Wood suitable for using injectors

You can inject most types of wood, but be aware that the hole must be deep enough to allow adequate chemical spread.

Allow a minimum of one injector every 110mm along the wood and one line of injectors across the wood grain at 75mm centres.

Death Watch Beetle holesHouse Longhorn Beetle holes

Death Watch Beetles rarely come to the surface. House Longhorn Beetle also stay mainly inside the wood.

 

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How to inject into Cracks using injectors - summary for a range of crack widths

1. Clean the crack surface using abrasion to prepare for later filling

2. Vacuum to remove all debris

3. Drill 10mm diameter holes at between 50mm and 110mm intervals along the crack lines

4. Blow or vacuum out all the bore dust

5. Bang-in the injectors flush to the surfaces with a hammer

6. Inject either Boron Paste , or Ultra Timber Paste, or Boron Ultra Gel , depending on the moisture content of the wood and the type of insect attack.

 

Injecting a timber beam via an injector using a syringe

Injection via an Injector using 50ml Syringe.

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How to choose a woodworm treatment product for injection through an injector

1. Death Watch Beetle - hollow when 'tapped' areas, test drilled. Tapping noises heard inside.

Damp Timber - over 16 - 18% moisture content - wood particles from drillings feel damp to the touch.

Use Boron Paste from a 400cc cartridge tube ejected into an empty 50ml syringe. Place the syringe tip firmly into the injector and gently push the plunger - you will use very little Boron Paste, so go slowly. Stop when the syringe plunger will no longer depress. Move to the next injector. Boron Paste likes dampness. It does not spread well inside 'dry' wood.

Dry Timber - below 16% moisture content - wood particles from drillings feel dry to the touch.

Use Ultra Timber Paste from a 400cc cartridge tube ejected into an empty 50ml syringe. Place the syringe tip firmly into the injector and gently push the plunger - you will use very little Timber Paste, so go slowly. Stop when the syringe plunger will no longer depress. Move to the next injector. Timber Paste likes dry wood. It does not spread well inside 'damp' wood.

Very Dry Timber - below 12% moisture content - wood particles from drillings feel very dry to the touch.

Use Ultra Boron Gel from a 500cc tub sucked up into an empty 50ml syringe. Place the syringe tip firmly into the injector and gently push the plunger - you will use very little Boron Gel, so go slowly. Stop when the syringe plunger will no longer depress. Move to the next injector. Boron Gel likes dry wood, but will also spread well inside 'damp' wood.

 

Injection of clear Boron Gel  into wood via an injection nozzle

Injecting Boron Gel with a 50ml syringe.

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2. House Longhorn Beetle - hollow when 'tapped' areas, test drilled. Chewing noises heard inside.

Dry Timber - below 16% moisture content - wood particles from drillings feel dry to the touch.

Use Ultra Timber Paste from a 400cc cartridge tube ejected into an empty 50ml syringe. Place the syringe tip firmly into the injector and gently push the plunger - you will use very little Timber Paste, so go slowly. Stop when the syringe plunger will no longer depress. Move to the next injector. Timber Paste likes dry wood. It does not spread well inside 'damp' wood. It is a Permethrin based cream emulsion.

Very Dry Timber - below 12% moisture content - wood particles from drillings feel very dry to the touch.

Use Ultra Boron Gel from a 500cc tub sucked up into an empty 50ml syringe. Place the syringe tip firmly into the injector and gently push the plunger - you will use very little Boron Gel, so go slowly. Stop when the syringe plunger will no longer depress. Move to the next injector. Boron Gel likes dry wood, but will also spread well inside 'damp' wood.

Damp Timber - over 16 - 18% moisture content - wood particles from drillings feel damp to the touch.

Use Boron Paste from a 400cc cartridge tube ejected into an empty 50ml syringe. Place the syringe tip firmly into the injector and gently push the plunger - you will use very little Boron Paste, so go slowly. Stop when the syringe plunger will no longer depress. Move to the next injector. Boron Paste likes dampness. It does not spread well inside 'dry' wood. It is a Boron based paste.

 

Injection of Timber Paste  into a timber via an injector.

Injecting a piece of wood using Ultra Timber Paste

with added brown colour powder..

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Woodworm Control - why we use wood preservatives

In the UK we are mainly concerned with woodworm treatment for Common Furniture Beetle, (Anobium punctatum, in Latin). We need to practice safe woodworm beetle treatment because of the long term damage that the woodworm larvae (grubs) cause in structural and decorative woodwork in domestic houses and commercial buildings.

Knowledge of the life cycle of the common furniture beetle (usually just called 'Woodworm' for short) is important when carrying out woodworm treatment because we cannot stop adult Woodworm beetles emerging using normal timber treatments, no matter which surface applied woodworm treatment product we use. To eventually cure woodworm we first need to break the 'egg laying cycle'.

Common furniture beetle starts life as an egg. These are laid on a bare, unpainted timber surface, or in cracks and crevices, end grain and down old emergence holes.

These larvae hatch, bore into the sap wood, where they cause most of the damage. The larvae feed on the wood and this 'worm' becomes larger for up to 5 years. At some stage the wood worm moves close to the surface and constructs a pupal chamber.

Between May and August the adult emerges from its pupal skin and chews its way out leaving the familiar 'woodworm holes'. When they cut their way out they are not actually feeding - the adult does not eat! When the adult beetles have emerged they mate and lay eggs, frequently down the old emergence holes and into the pupal chambers and tunnels. Sometimes both mating and egg laying can take place within the emergence hole itself.


How to stop Woodworm

Woodworm treatment is essential, if active woodworm is present, in order to prevent woodworm eggs from successfully boring into the timber and continuing the woodworm life cycle. If woodworm, or worse still Death Watch Beetle, (or even worse still House Longhorn Beetle) is allowed to continue to eat your wood, it will be structurally weakened by the multitude of internal tunnels and beetle flight escape holes. These exit holes are evidence of an attack of some type of woodworm, but the size of the exit hole is important in determining the beetle species and hence its life expectancy. Death watch Beetle has a much longer cycle (8 to 10 years) than Common Furniture Beetle (3 to 5 years), so woodworm treatment, as a woodworm killer, has to be adapted to suit the insect involved. Timber treatment is only part of the woodworm story. Dampness also plays an important part in woodworm attack, (woodworm prefer damp or wet timber) so timber treatment must take account of damp, its source and its control or elimination. Fortunately, Boron based products love moisture - they 'seek' the dampest parts of the wood, thus protecting the most vulnerable areas.

Consult our Qualified Woodworm Experts for safe, odour free Woodworm Treatment. We supply a Licensed Borax product as an Insecticide - very safe, no smell and permanent.


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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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