Rendering on the exterior walls of building is generally used as an alternative to brick or concrete blocks.

Note. While dry render is paintable care should be taken as to the quality and nature of the work.

If in doubt regarding the condition and product suitability of a coatings to applied advice from the manufacture should be obtained.

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Carbonation of concrete is caused when moisture penetrates through porous areas of the structure allowing carbon dioxide to react with calcium hydroxide in the cement. (calcium carbonate).

When mixed with water the calcium carbonate forms a paste and can lead to corrosion (rust) of the steel reinforcing bars (Rebars).

As the corrosion builds up the the swelling can cause the concrete to fracture and ultimately breakaway.

For minor works the following solution may be considered but for any major works a structural engineer should be consulted.

Solution.

Where carbonation has occurred, all defective concrete should be removed and the exposed steel bars should be cleaned to remove all corrosion; followed by priming the steelwork with an anticorrosive primer.

All defective areas of concrete should then be made good as required and allowed to dry.

Painting.

An anti-carbonation coating should be applied in accordance with the manufacturer’s instructions.

Suppliers of anti-carbonation coatings include.

Andura Coatings. https://www.andura.com/contact

 New Guard Coatings Limited. https://newguardcoatings.com

Dulux. https://www.duluxtradepaintexpert.co.uk

Johnstones Paints.https://www.johnstonespaint.com/

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Under Bound Surfaces

Cause

Flaking is due to the underlying material being under bound Material which in case is old distemper

Solution

Complete removal of all the coating should be removed back to a sound surface.

Patch repair and painting is not advisable.

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These are all questions which can quickly run through the minds of those who encounter a problem.

It is quite easy to seek help from your product supplier and if necessary ask for the assistance of the paint manufacturer’s technical staff. They are there to help, not to apportion blame.

Today’s technology and production faculties enable manufactures to produce paint in large batch sizes of up 40,000 litres at any one time.

Quality control procedures by raw material suppliers and the manufacture ensure as far as possible, that the products manufactured are consistent. Even so they too can occasionally get it wrong.

For technical and environmental reasons, coatings have changed over the years along with the types of surfaces that require painting. These changes have made it more difficult to always get it right and it is not necessarily the problem of anyone person.

When it is necessary to call in the supplier/manufacture or an independent consultant, to save unnecessary time it is best to obtain all the relevant details relating to the issue and the following is suggested:

• • • • • Name, Address, Telephone Number.
        • The best time to contact.
        • Your Client’s Name and Address (with consent).
        • Information relating to the product (s) used.
        • Specification employed. Who issued the specification
        • Interior – Exterior.
        • Surface condition.
        • Weather conditions.
        • Temperature.
        • Batch numbers of the product (s) used (always printed on containers).
        • Method of application.
        • Your interpretation of the problem.

The above will enable the supplier/manufacture to check if the actual product (s) of the same batch is/are in stock. If not, they can check the retained sample. (All manufactures retain a small sample of the product batch for 12 months or longer). It is always best to deal with matters in this way, as the supplier’s/manufacture’s representative will know before arriving on site if the product is at fault or not.

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Distemper is available in three qualities, soft, hard and oil based.

Soft distemper is the most permeable for interior use and the dry film is chalky and can easily rub rub off when brushed.

Hard distemper is modified with casein (glue) to offer greater resistance to abrasion.

Oil based has been modified with oils such as raw linseed oil giving greater resistance to wetting.

Specification

General

All surfaces new or previously applied distemper should be thoroughly cleaned down by the most appropriate means to remove loose, defective material, dust, dirt, organic growths and any other contaminates to leave the surface clean and dry.

Areas affected by organic growths should be treated with a fungicidal solution in accordance with manufactures instruction.

All making good with the appropriate filler and sanded down.

Priming

Apply one coat of Clearcole primer to all new or bare areas of plaster and allowed to dry.

Painting

Apply two or more coats of Distemper in accordance with the manufactures instructions.

For further information contact: https://www.roseofjericho.co.uk  Tel: 0193583676

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Spraying Painting- why not?

Spray painting is not difficult; pull the trigger, paint flows, release the trigger, paint stops.

Traditional painting methods by brush and roller can be time consuming but today even though masking up of areas may be necessary, spray painting is more efficient.

Included in today’s range of spray equipment are low pressure units which reduce the amount of masking up needed.

While training is required, there are academies where the basic principles of spraying can be mastered within the day.

Once mastered the benefits associated with spray application including speed and cost savings are readily appreciated.

See range of spray units under:  And much more : Advanced Decorating Skills

The range of equipment available for the domestic and industrial applications readily available from  manufacturers and nationwide decorators merchants such as:

https://www.wagnerspraytech.com 

https://www.brewers.co.uk/products/spray-painting

Paint Like a Pro. https://www.youtube.com/watch?v=RNRay1oMHfU&feature=emb_rel_end

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Gilding is an advanced decorative Skill.

How is gold leaf produced.

Gold normally 24 ct is melted and the liquid in poured into moulds to produce small blocks of gold. The blocks are then pounded or pressed out by rollers to a thickness of 0.001″ .025mm and then cut into squares approximately 3.4″ – 80mm  leaves, which are sandwiched between layers of parchment paper which are then sold in a book of 25 leaves.

Surface preparation.

All surfaces to be gilded should be thoroughly prepared and free from all loosed defective material oil and grease. and sanded down to provide a key .

Any bare timber or metal should be suitable primed and surface imperfections made good with the appropriate material, before proceeding to the next stage.

An even base/ground coat should be applied and to  the surface and left to dry. The basecoat colour selection is important as a red shade will reflect an enrich the gold colour where as a grey or blue tone will reflect a cool tone.

An adhesion coat used to receive the gold leaf is traditionally known as Gold Size  and can be either oil or water based although the latter is only suitable for interior use. The  Gold Size should be left for  10-30 minutes as it reaches the tack stage but this may vary depending on the surface and ambient temperature, therefore, should be checked at regular intervals.  Once the tack stage has been reached the gold leaf should be applied with a gilders tip ( see gilders toolbox). when applying further leaves overlap the adjacent ones by approximately 2mm to ensure there are no gaps between the each applied leaf. Do not remove any surplus material until the Gold size has completely dried, normally 1-2 hours depending on temperature. For ornate mouldings apply the Gold leaf with a soft mop brush using a tapping/stencilling action.

When fully dried brush any surplus material with the soft mop brush saving all the loose material for filling any small voids.

See. Gilder’s Toolbox under Tools and Equipment.

For full information on Tools and Equipment contact: A S Handover Ltd at:  http://www.handover.co.uk

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Wood Rot

Cause

Wood Rot: comes in two forms Dry and Wet. (see wet rot)

Dry Rot. The term implies that the timber is in a dry condition but it would normally have a moisture content reading of approximately 28%.

This along with a damp humid environment can lead to fungal growths forming on the timber.

Once the fungi spores /growths are established even though the moisture content of the wood has dropped and the cause remedied, the spores can still survive if the moisture content in the timber is still around 20%.

The fungi feeds on the wood and extracts the moisture/water which results in the wood structure becoming dry and brittle.

Remedy

The affected areas should be treated as soon as possible as the fungi spores can quickly spread. In domestic situations dry rot can often be found under floorboards at ground level where the air bricks are blocked. Other areas can be unvented cellars and roof spaces.

In these cases the assistance of a specialist wood preserving company should be sought.

For further information and specific advice contact:

https://www.rentokil.co.uk or search for local contractors

For wood repair systems: www.repair-care.co.uk  windowcaresystemsang

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