Woodworm in buildings - Revision history

Designing Buildings at 08:23, 10 May 2022

2022-05-10T08:23:02Z

← Older revision		Revision as of 08:23, 10 May 2022
Line 64:		Line 64:
	* European Union Timber Regulation.		* European Union Timber Regulation.
	* Forests.		* Forests.
		+	* Insects.
	* Powder post beetle.		* Powder post beetle.
	* Recognising wood rot and insect damage in buildings.		* Recognising wood rot and insect damage in buildings.

Designing Buildings at 08:10, 10 May 2022

2022-05-10T08:10:23Z

← Older revision		Revision as of 08:10, 10 May 2022
Line 64:		Line 64:
	* European Union Timber Regulation.		* European Union Timber Regulation.
	* Forests.		* Forests.
		+	* Powder post beetle.
	* Recognising wood rot and insect damage in buildings.		* Recognising wood rot and insect damage in buildings.
	* Roofing defects.		* Roofing defects.

Designing Buildings at 08:08, 10 May 2022

2022-05-10T08:08:00Z

← Older revision		Revision as of 08:08, 10 May 2022
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	Woodworm infestation of untreated timber is a relatively common problem. The House Longhorn beetle was a particular problem in the UK prior to the introduction of pretreated timber in the 1960s.		Woodworm infestation of untreated timber is a relatively common problem. The House Longhorn beetle was a particular problem in the UK prior to the introduction of pretreated timber in the 1960s.

−	The House Longhorn beetle measures up to 25 mm long when mature, and can lay up to 200 eggs on the rough surface of untreated timber. After 2-3 weeks, the larvae emerge and bore into the timber. They can be detected by the powdery deposits known as ‘frass’ left on the surface and the bore holes of around 3 mm diameter. They are ~~attreacted~~ to damp areas and timber with a high moisture content.	+	The House Longhorn beetle measures up to 25 mm long when mature, and can lay up to 200 eggs on the rough surface of untreated timber. After 2-3 weeks, the larvae emerge and bore into the timber. They can be detected by the powdery deposits known as ‘frass’ left on the surface and the bore holes of around 3 mm diameter. They are attracted to damp areas and timber with a high moisture content.

	If you’ve only just noticed these holes, it’s unlikely that the structural integrity of the beam has been compromised. If you’ve only just revealed the beam, for example it was under plasterboard or a thick coat of varnish, it’s important to get the timber inspected by an expert as soon as possible, who will be able to identify the type and extent of any infestation you may have, and also let you know whether there are any structural issues to consider.		If you’ve only just noticed these holes, it’s unlikely that the structural integrity of the beam has been compromised. If you’ve only just revealed the beam, for example it was under plasterboard or a thick coat of varnish, it’s important to get the timber inspected by an expert as soon as possible, who will be able to identify the type and extent of any infestation you may have, and also let you know whether there are any structural issues to consider.
Line 69:		Line 69:
	* Timber framed buildings and fire.		* Timber framed buildings and fire.
	* Timber preservation.		* Timber preservation.
		+	* Wood-boring weevil.
	* Woodworm and spiders.		* Woodworm and spiders.

Designing Buildings at 08:03, 10 May 2022

2022-05-10T08:03:25Z

← Older revision		Revision as of 08:03, 10 May 2022
Line 58:		Line 58:
	* Building preservation archive.		* Building preservation archive.
	* Common furniture beetle.		* Common furniture beetle.
		+	* Death watch beetle.
	* Defects in construction.		* Defects in construction.
	* Domestic roofs.		* Domestic roofs.

Designing Buildings at 08:01, 10 May 2022

2022-05-10T08:01:48Z

← Older revision		Revision as of 08:01, 10 May 2022
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	Depending on the infestation type, you may see some symptoms in the coming years due to the life cycle of the beetle and the fact that the insecticide used is a contact insecticide. This means that for treatment to be effective the life cycle must be completed as only emerging beetles or lava laid on the surface of treated timbers will be destroyed. Despite of this life cycle, which differs depending on breed, rest assured. All our timber treatments come with long term guarantees for your peace of mind.		Depending on the infestation type, you may see some symptoms in the coming years due to the life cycle of the beetle and the fact that the insecticide used is a contact insecticide. This means that for treatment to be effective the life cycle must be completed as only emerging beetles or lava laid on the surface of treated timbers will be destroyed. Despite of this life cycle, which differs depending on breed, rest assured. All our timber treatments come with long term guarantees for your peace of mind.

−	= Related articles on Designing Buildings ~~Wiki~~ =	+	See also: Common furniture beetle.
		+
		+	= Related articles on Designing Buildings =

−	* Adhesives.
	* Ancient Woodland.		* Ancient Woodland.
	* Building preservation archive.		* Building preservation archive.
−	* ~~Confederation of Timber Industries.~~	+	* Common furniture beetle.
−	* Cross-laminated timber.	+
	* Defects in construction.		* Defects in construction.
	* Domestic roofs.		* Domestic roofs.
	* Dry rot fungus.		* Dry rot fungus.
	* European Union Timber Regulation.		* European Union Timber Regulation.
−	* Flat roof defects.
−	* Flooring defects.
	* Forests.		* Forests.
−	* Glulam.
−	* Laminated veneer lumber LVL.
−	* Plywood.
	* Recognising wood rot and insect damage in buildings.		* Recognising wood rot and insect damage in buildings.
	* Roofing defects.		* Roofing defects.
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	--[[User:AtlantisDamp\|AtlantisDamp]] 12:41, 20 Mar 2019 (BST)		--[[User:AtlantisDamp\|AtlantisDamp]] 12:41, 20 Mar 2019 (BST)

−	[[Category:~~Conservation~~]] [[Category:~~DCN_Guidance~~]] [[Category:~~Theory~~]]	+	[[Category:DCN_Guidance]] [[Category:Theory]] [[Category:Conservation]]

Editor at 20:00, 20 November 2020

2020-11-20T20:00:20Z

← Older revision		Revision as of 20:00, 20 November 2020
Line 77:		Line 77:
	--[[User:AtlantisDamp\|AtlantisDamp]] 12:41, 20 Mar 2019 (BST)		--[[User:AtlantisDamp\|AtlantisDamp]] 12:41, 20 Mar 2019 (BST)

−	[[Category:Conservation]] [[Category:Theory]]	+	[[Category:Conservation]] [[Category:DCN_Guidance]] [[Category:Theory]]

Designing Buildings at 13:23, 20 March 2019

2019-03-20T13:23:27Z

← Older revision		Revision as of 13:23, 20 March 2019
Line 51:		Line 51:
	Depending on the infestation type, you may see some symptoms in the coming years due to the life cycle of the beetle and the fact that the insecticide used is a contact insecticide. This means that for treatment to be effective the life cycle must be completed as only emerging beetles or lava laid on the surface of treated timbers will be destroyed. Despite of this life cycle, which differs depending on breed, rest assured. All our timber treatments come with long term guarantees for your peace of mind.		Depending on the infestation type, you may see some symptoms in the coming years due to the life cycle of the beetle and the fact that the insecticide used is a contact insecticide. This means that for treatment to be effective the life cycle must be completed as only emerging beetles or lava laid on the surface of treated timbers will be destroyed. Despite of this life cycle, which differs depending on breed, rest assured. All our timber treatments come with long term guarantees for your peace of mind.

−	~~= Find out more =~~	+	= Related articles on Designing Buildings Wiki =
−		+
−	=== Related articles on Designing Buildings Wiki ===	+

	* Adhesives.		* Adhesives.

Designing Buildings at 13:23, 20 March 2019

2019-03-20T13:23:04Z

← Older revision		Revision as of 13:23, 20 March 2019
Line 1:		Line 1:
	[[File:Woodworm.jpg\|link=File:Woodworm.jpg]]		[[File:Woodworm.jpg\|link=File:Woodworm.jpg]]
		+
		+	= Introduction =

	Woodworm infestation of untreated timber is a relatively common problem. The House Longhorn beetle was a particular problem in the UK prior to the introduction of pretreated timber in the 1960s.		Woodworm infestation of untreated timber is a relatively common problem. The House Longhorn beetle was a particular problem in the UK prior to the introduction of pretreated timber in the 1960s.

AtlantisDamp at 12:43, 20 March 2019

2019-03-20T12:43:20Z

← Older revision		Revision as of 12:43, 20 March 2019
Line 4:		Line 4:

	The House Longhorn beetle measures up to 25 mm long when mature, and can lay up to 200 eggs on the rough surface of untreated timber. After 2-3 weeks, the larvae emerge and bore into the timber. They can be detected by the powdery deposits known as ‘frass’ left on the surface and the bore holes of around 3 mm diameter. They are attreacted to damp areas and timber with a high moisture content.		The House Longhorn beetle measures up to 25 mm long when mature, and can lay up to 200 eggs on the rough surface of untreated timber. After 2-3 weeks, the larvae emerge and bore into the timber. They can be detected by the powdery deposits known as ‘frass’ left on the surface and the bore holes of around 3 mm diameter. They are attreacted to damp areas and timber with a high moisture content.
		+
		+	If you’ve only just noticed these holes, it’s unlikely that the structural integrity of the beam has been compromised. If you’ve only just revealed the beam, for example it was under plasterboard or a thick coat of varnish, it’s important to get the timber inspected by an expert as soon as possible, who will be able to identify the type and extent of any infestation you may have, and also let you know whether there are any structural issues to consider.

	Other woodborer insects include:		Other woodborer insects include:
Line 10:		Line 12:
	* Lyctus powder post beetle: These are 10-15 mm long and lap 70-200 eggs on the sapwood of new hardwood.		* Lyctus powder post beetle: These are 10-15 mm long and lap 70-200 eggs on the sapwood of new hardwood.
	* Death Watch beetle: Around 7 mm long and lay 40-80 eggs on hardwood. Are a particular problem on oak timbers found in old churches and similar buildings.		* Death Watch beetle: Around 7 mm long and lay 40-80 eggs on hardwood. Are a particular problem on oak timbers found in old churches and similar buildings.
		+
		+	= Is the infestation active or inactive? =
		+
		+	It is important to identify whether and infestation is active or inactive. Very often, tunnels and holes found in decorative beams in your home are of historical nature and the beam was left in place as the previous attack did not affect the structural integrity of the beam.
		+
		+	Nevertheless, it is important to identify whether the holes you have found are due to a currently active woodworm. Sometimes you may be able to see frass. This is a dust-like or gritty substance that that comes out of the holes during emergence season – normally around May to September. Occasionally you may even see the beetle. If you are lucky enough to see a beetle, try to keep it in a container until you bring in a specialist as it will help with the identification, and therefore treatment, of your wood boring insect.
		+
		+	If you’re not sure if the frass is fresh and you have not seen any beetles emerging, there are a couple of things to try. You could fill the holes with shoe polish and await the emergence season. If the infestation is active, you will see the shoe polish is no longer in place. Alternatively, you could wrap some newspaper around the beam, again wait for the emergence season and then check the paper for frass.
		+
		+	= What steps are required to successfully treat a timber infestation? =
		+
		+	The process for treating timber is a specialist task which includes:
		+
		+	* Correct identification of the infestation and its extent through looking at identifying factors such as the tunnels, the emergence holes and the frass.
		+	* Ensure all timbers can be accessed.
		+	* Check extent of damage by probing and drilling if required, for example treatment of Death Watch Beetle (Xestobium rufovillosum).
		+	* Thorough cleaning down of all timbers to ensure the timber, not the frass, is treated.
		+	* Expose built in ends of structural timbers.
		+	* Correct and thorough application of species-specific insecticides.
		+	* Utilising health and safety best practice for your re-entry time.

	Timber can be treated:by:		Timber can be treated:by:
Line 22:		Line 44:

	For more information, see also: Timber preservation and Woodworm and spiders.		For more information, see also: Timber preservation and Woodworm and spiders.
		+
		+	= Will the problem return? =
		+
		+	Depending on the infestation type, you may see some symptoms in the coming years due to the life cycle of the beetle and the fact that the insecticide used is a contact insecticide. This means that for treatment to be effective the life cycle must be completed as only emerging beetles or lava laid on the surface of treated timbers will be destroyed. Despite of this life cycle, which differs depending on breed, rest assured. All our timber treatments come with long term guarantees for your peace of mind.

	= Find out more =		= Find out more =

AtlantisDamp: Undo revision 130775 by [[Special:Contributions/[IP address hidden]|[IP address hidden]]] ([[User talk:[IP address hidden]|talk]])

2019-03-20T12:41:08Z

Undo revision 130775 by [[Special:Contributions/[IP address hidden]|[IP address hidden]]] ([[User talk:[IP address hidden]|talk]])

← Older revision		Revision as of 12:41, 20 March 2019
Line 4:		Line 4:

	The House Longhorn beetle measures up to 25 mm long when mature, and can lay up to 200 eggs on the rough surface of untreated timber. After 2-3 weeks, the larvae emerge and bore into the timber. They can be detected by the powdery deposits known as ‘frass’ left on the surface and the bore holes of around 3 mm diameter. They are attreacted to damp areas and timber with a high moisture content.		The House Longhorn beetle measures up to 25 mm long when mature, and can lay up to 200 eggs on the rough surface of untreated timber. After 2-3 weeks, the larvae emerge and bore into the timber. They can be detected by the powdery deposits known as ‘frass’ left on the surface and the bore holes of around 3 mm diameter. They are attreacted to damp areas and timber with a high moisture content.
−
−	If you’ve only just noticed these holes, it’s unlikely that the structural integrity of the beam has been compromised. If you’ve only just revealed the beam, for example it was under plasterboard or a thick coat of varnish, it’s important to get the timber inspected by an expert as soon as possible, in order to identify the type and extent of any infestation you may have as well as identify whether there are any structural issues to consider.

	Other woodborer insects include:		Other woodborer insects include:
Line 13:		Line 11:
	* Death Watch beetle: Around 7 mm long and lay 40-80 eggs on hardwood. Are a particular problem on oak timbers found in old churches and similar buildings.		* Death Watch beetle: Around 7 mm long and lay 40-80 eggs on hardwood. Are a particular problem on oak timbers found in old churches and similar buildings.

−	~~= Is the infestation active or inactive? =~~	+	Timber can be treated:by:
−		+
−	It is important to identify whether and infestation is active or inactive. Very often, tunnels and holes found in decorative beams in your home are of historical nature and the beam was left in place as the previous attack did not affect the structural integrity of the beam.	+
−		+
−	Nevertheless, it is important to identify whether the holes you have found are due to a currently active woodworm. Sometimes you may be able to see frass. This is a dust-like or gritty substance that that comes out of the holes during emergence season – normally around May to September. Occasionally you may even see the beetle. If you are lucky enough to see a beetle, try to keep it in a container until you bring in a specialist as it will help with the identification, and therefore treatment, of your wood boring insect.	+
−		+
−	If you’re not sure if the frass is fresh and you have not seen any beetles emerging, there are a couple of things to try. You could fill the holes with shoe polish and await the emergence season. If the infestation is active, you will see the shoe polish is no longer in place. Alternatively, you could wrap some newspaper around the beam, again wait for the emergence season and then check the paper for frass.	+
−		+
−	~~= What steps are required to successfully treat a timber infestation? =~~	+
−		+
−	~~The process for treating timber is a specialist task which includes:~~	+
−		+
−	* Correct identification of the infestation and its extent through looking at identifying factors such as the tunnels, the emergence holes and the frass.	+
−	* Ensure all timbers can be accessed.	+
−	* Check extent of damage by probing and drilling if required, for example treatment of Death Watch Beetle (Xestobium rufovillosum).	+
−	* Thorough cleaning down of all timbers to ensure the timber, not the frass, is treated.	+
−	* Expose built in ends of structural timbers.	+
−	* Correct and thorough application of species-specific insecticides.	+
−	* Utilising health and safety best practice for your re-entry time.	+
−		+
−	Timber can be treated by:	+

	* A water-based boron treatment which can be sprayed or brushed on, or injected as a gel or paste.		* A water-based boron treatment which can be sprayed or brushed on, or injected as a gel or paste.
Line 44:		Line 22:

	For more information, see also: Timber preservation and Woodworm and spiders.		For more information, see also: Timber preservation and Woodworm and spiders.
−
−	~~= Will the problem return? =~~
−
−	Depending on the infestation type, you may see some symptoms in the coming years due to the life cycle of the beetle and the fact that the insecticide used is a contact insecticide. This means that for treatment to be effective the life cycle must be completed as only emerging beetles or lava laid on the surface of treated timbers will be destroyed. Despite of this life cycle, which differs depending on breed, rest assured. All our timber treatments come with long term guarantees for your peace of mind.

	= Find out more =		= Find out more =
Line 74:		Line 48:
	* Timber preservation.		* Timber preservation.
	* Woodworm and spiders.		* Woodworm and spiders.
		+
		+	--[[User:AtlantisDamp\|AtlantisDamp]] 12:41, 20 Mar 2019 (BST)

	[[Category:Conservation]] [[Category:Theory]]		[[Category:Conservation]] [[Category:Theory]]