How to clean masonry - Revision history

Designing Buildings at 07:37, 23 November 2020

2020-11-23T07:37:13Z

← Older revision		Revision as of 07:37, 23 November 2020
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	* The Stone Restoration Handbook.		* The Stone Restoration Handbook.

−	[[Category:Conservation]] [[Category:Construction_techniques]]	+	[[Category:Conservation]] [[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge]] [[Category:Construction_techniques]]

Designing Buildings at 06:49, 26 April 2020

2020-04-26T06:49:25Z

← Older revision		Revision as of 06:49, 26 April 2020
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	* Power-washing.		* Power-washing.

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

	* Brick.		* Brick.
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	* Sand blasting machines.		* Sand blasting machines.
	* Stone dressing.		* Stone dressing.
		+	* The Stone Restoration Handbook.

	[[Category:Conservation]] [[Category:Construction_techniques]]		[[Category:Conservation]] [[Category:Construction_techniques]]

Editor at 11:59, 16 May 2018

2018-05-16T11:59:20Z

← Older revision		Revision as of 11:59, 16 May 2018
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	* Mould growth.		* Mould growth.
	* Pattern staining and soiling in stonework.		* Pattern staining and soiling in stonework.
		+	* Pointing.
	* Repointing.		* Repointing.
	* Restoration.		* Restoration.

Editor at 14:24, 8 May 2018

2018-05-08T14:24:31Z

← Older revision		Revision as of 14:24, 8 May 2018
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	Other considerations might include:		Other considerations might include:

−	* The cause of the problem, i.e. whether it is due to a construction defect, lack of maintenance, damp and so on.	+	* The cause of the problem, i.e. whether it is due to a construction defect, lack of maintenance, damp, and so on.
	* Whether it is causing damage and/or harm to the building.		* Whether it is causing damage and/or harm to the building.
	* The possible damage to the building fabric as a result of cleaning.		* The possible damage to the building fabric as a result of cleaning.
Line 44:		Line 44:
	* Mould growth.		* Mould growth.
	* Pattern staining and soiling in stonework.		* Pattern staining and soiling in stonework.
		+	* Repointing.
	* Restoration.		* Restoration.
	* Sand blasting machines.		* Sand blasting machines.

Editor at 15:03, 17 April 2018

2018-04-17T15:03:41Z

← Older revision		Revision as of 15:03, 17 April 2018
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	* Efflorescence.		* Efflorescence.
	* How to clean concrete.		* How to clean concrete.
		+	* Lime run-off.
	* Masonry.		* Masonry.
	* Membrane separation cleaning chemicals.		* Membrane separation cleaning chemicals.

109.149.181.243 at 12:24, 16 November 2017

2017-11-16T12:24:09Z

← Older revision		Revision as of 12:24, 16 November 2017
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−	~~The cleaning of masonry is an activity involved in the conservation of buildings.~~ There are several different ~~objectives that can apply to the~~ cleaning of masonry: property owners may want stonework to be pristine for aesthetic reasons; local councils may want to maintain heritage buildings in a good condition; conservationists may want to protect the historic fabric, and so on.	+	There are several different reasons for cleaning masonry:

−	~~Before going ahead with masonry cleaning, it is important to assess whether or not cleaning will benefit the building~~. ~~This is important because cleaning can cause damage to~~ a ~~building, either while cleaning is underway, or over a period~~ of ~~time after completion~~.	+	* For aesthetic reasons.
		+	* To maintain older buildings in a good condition.
		+	* To protect the historic fabric of buildings.

−	~~The type of dirt and~~ the ~~material to be cleaned should be assessed and~~, ~~in some cases~~, ~~pre-project trials carried out. The client should be consulted on this process so that they are aware~~ of ~~the likely results and accept the quality standard of the work~~.	+	It is important to first assess whether cleaning will benefit the building, as it can cause damage, either while cleaning is underway, or over a period of time after completion.

−	~~Some~~ of the ~~considerations that~~ should be ~~settled before cleaning include:~~	+	The type of dirt or other blemish and the material to be cleaned should be assessed and, in some cases, trials carried out. The client should be consulted on this process so that they are aware of the likely results and accept the quality standard of the work.

−	* The material of the construction.	+	Other considerations might include:
−	* The dirt that needs to be cleaned.	+
−	* The cause of the ~~dirt~~, i.e. whether due to a construction defect, lack of maintenance, and so on.	+	* The cause of the problem, i.e. whether it is due to a construction defect, lack of maintenance, damp and so on.
−	* Whether ~~the dirt~~ is causing damage and/or harm to the building.	+	* Whether it is causing damage and/or harm to the building.
	* The possible damage to the building fabric as a result of cleaning.		* The possible damage to the building fabric as a result of cleaning.
−	* ~~Standard~~ of cleanliness to be achieved.	+	* The standard of cleanliness to be achieved.
	* How long should the fabric, in its cleaned condition, last?		* How long should the fabric, in its cleaned condition, last?

−	The most common cleaning agent is water, however, it can create problems (such as decay) if it isn’t used carefully, with the most appropriate chemicals. A typical technique is to apply water to the surface using a pressure washer. Pre-soaking the masonry fills its microscopic pores with water, keeping the chemicals on the surface and guarding against penetration. A white residue can be left behind if the chemicals are not fully flushed out when the building dries.	+	The most common cleaning agent is water, however, this can create problems (such as decay) if it isn’t used carefully, with the most appropriate chemicals. A typical technique is to apply water to the surface using a pressure washer. Pre-soaking the masonry fills its microscopic pores with water, keeping the chemicals on the surface and guarding against deeper penetration. A white residue can be left behind if the chemicals are not fully flushed out when the building dries.

−	Fungus, moss and mildew can be cleaned by using household liquid bleach in warm water, applied with a stiff-bristle brush. The solution must be rinsed off with clean water. As bleach can struggle to dissolve large amounts of growths, a broad-bladed putty knife ~~should~~ be used to scrape off as much as possible from the surface before applying the bleach. The bleach should be left for a short while before scrubbing with a brush and rinsing, to properly remove the fungus spores which can quickly grow back.	+	Fungus, moss and mildew can generally be cleaned by using household liquid bleach in warm water, applied with a stiff-bristle brush. The solution must be rinsed off with clean water. As bleach can struggle to dissolve large amounts of growths, a broad-bladed putty knife may be used to scrape off as much as possible from the surface before applying the bleach. The bleach should be left for a short while before scrubbing with a brush and rinsing to properly remove the fungus spores which can quickly grow back.

	A slightly more difficult cleaning problem is presented by oils, soot and mineral residue, which are often embedded deeper into the masonry pores than moss or mildew. A solution of muriatic acid and water can be applied, scrubbing off after around 15 minutes before rinsing.		A slightly more difficult cleaning problem is presented by oils, soot and mineral residue, which are often embedded deeper into the masonry pores than moss or mildew. A solution of muriatic acid and water can be applied, scrubbing off after around 15 minutes before rinsing.

−	Paint can be removed ~~from masonry~~ by ~~these techniques~~:	+	Paint and other more embedded material can be removed by:

	* Sandblasting.		* Sandblasting.

Editor at 12:32, 31 October 2017

2017-10-31T12:32:34Z

← Older revision		Revision as of 12:32, 31 October 2017
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	* Restoration.		* Restoration.
	* Sand blasting machines.		* Sand blasting machines.
		+	* Stone dressing.

	[[Category:Conservation]] [[Category:Construction_techniques]]		[[Category:Conservation]] [[Category:Construction_techniques]]

Editor at 16:24, 7 September 2017

2017-09-07T16:24:37Z

← Older revision		Revision as of 16:24, 7 September 2017
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	* Defects in stonework.		* Defects in stonework.
	* Efflorescence.		* Efflorescence.
		+	* How to clean concrete.
	* Masonry.		* Masonry.
	* Membrane separation cleaning chemicals.		* Membrane separation cleaning chemicals.

Editor at 14:56, 6 September 2017

2017-09-06T14:56:52Z

← Older revision		Revision as of 14:56, 6 September 2017
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	The cleaning of masonry is an activity involved in the conservation of buildings. There are several different objectives that can apply to the cleaning of masonry: property owners may want stonework to be pristine for aesthetic reasons; local councils may want to maintain heritage buildings in a good condition; conservationists may want to protect the historic fabric, and so on.		The cleaning of masonry is an activity involved in the conservation of buildings. There are several different objectives that can apply to the cleaning of masonry: property owners may want stonework to be pristine for aesthetic reasons; local councils may want to maintain heritage buildings in a good condition; conservationists may want to protect the historic fabric, and so on.

−	Before going ahead with masonry cleaning, it is important to assess whether or not cleaning will benefit the building. This is important, because cleaning can cause damage to a building, either while cleaning is underway, or over a period of time after completion. The type of dirt and the material to be cleaned should be assessed and, in some cases, pre-project trials carried out. The client should be consulted on this process so that they are aware of the likely results and accept the quality standard of the work.	+	Before going ahead with masonry cleaning, it is important to assess whether or not cleaning will benefit the building. This is important because cleaning can cause damage to a building, either while cleaning is underway, or over a period of time after completion.
		+
		+	The type of dirt and the material to be cleaned should be assessed and, in some cases, pre-project trials carried out. The client should be consulted on this process so that they are aware of the likely results and accept the quality standard of the work.

	Some of the considerations that should be settled before cleaning include:		Some of the considerations that should be settled before cleaning include:

Editor at 14:51, 6 September 2017

2017-09-06T14:51:12Z

← Older revision		Revision as of 14:51, 6 September 2017
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−	The cleaning of masonry is an activity involved in the conservation of buildings. There are several different objectives that can apply to the cleaning of masonry: property owners may want stonework to be pristine for aesthetic reasons; ~~town planners~~ may want to maintain heritage buildings; conservationists may want to protect the historic fabric, and so on.	+	The cleaning of masonry is an activity involved in the conservation of buildings. There are several different objectives that can apply to the cleaning of masonry: property owners may want stonework to be pristine for aesthetic reasons; local councils may want to maintain heritage buildings in a good condition; conservationists may want to protect the historic fabric, and so on.

	Before going ahead with masonry cleaning, it is important to assess whether or not cleaning will benefit the building. This is important, because cleaning can cause damage to a building, either while cleaning is underway, or over a period of time after completion. The type of dirt and the material to be cleaned should be assessed and, in some cases, pre-project trials carried out. The client should be consulted on this process so that they are aware of the likely results and accept the quality standard of the work.		Before going ahead with masonry cleaning, it is important to assess whether or not cleaning will benefit the building. This is important, because cleaning can cause damage to a building, either while cleaning is underway, or over a period of time after completion. The type of dirt and the material to be cleaned should be assessed and, in some cases, pre-project trials carried out. The client should be consulted on this process so that they are aware of the likely results and accept the quality standard of the work.