Archive Monthly Archives: August 2012

Touch Up Painted Surfaces

Touching-up of painted surfaces

Some colours are more durable than others are – on exterior products, a fade rate of up to 20% year on year is regarded as normal wear and tear. This means that after 5 years approximately 40% of the original colour will remain.

Touching-up must always be done from corner to corner, from top to bottom or from one natural break in the wall to the next. If this is not done, the following problems may result:

Existing surfaces:

On exterior products, fading will begin to occur soon after application, and if the original colour is used for touchups, it will be visible.

Slight colour variations may occur in factory batches. Areas touched-up with a different factory batch will be visible.

Where newly painted walls have been damaged, the same principle applies as for the redecoration of existing surfaces: Where touchups are done on a wall, there will be a colour difference due to the extra depth of colour on that one spot.

The touched-up patch will also stand slightly proud on the walls, which will result in an uneven appearance, from which the light reflection will differ.

Touch-ups and patching are usually done with a brush and these brush marks will contribute to the difference in appearance, against a background where a roller was previously used.

The effect of touch-ups and spot-patching will be made worse in cases where a crack filler has been used on damaged areas and touching up/patching without a sealer/primer will result in a dull, rough appearance where the crack filler has absorbed the binder in the topcoat.

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Come Celebrate with us In Store at Hot Pot Paint Vereeniging

Win Prizes, Get Discounts, Let the Kids have Fun at Hot Pot Paint & Hardware Vereeniging

1st September 2012 7:30am until 1pm

Hot Pot Paint & Hardware, Houtkop Road, Vereeniging

 

 

Open day at Hot Pot Paint and Hardware Vereeniging September 1st 2012

 

 1st September 2012 at Hot Pot Paint Vereeniging

Grand Prize Draw in Store on the Day!

Enter the Hot Pot Paint Competition to win great prizes when you purchase any 2x20l products from our special offer range in July/August 2012.

Throughout July and August in our Vereeniging Store, each time you purchase 2 x 20l of our special range you get an entry to win one of the following great prizes in store on the day!

GRAND PRIZE DRAW

SAMSUNG Colour LCD TV 32″

LG Microwave

Garmin NUVI 1200

AEG Pressure Cooker

SALTON 3 Dish Buffet Server

Russell Hobbs Frying Pan / Casserole

Russell Hobbs Coffee Maker

Mellerware Cordless Jug Kettle

Mellerware Slow Cooker

Plus other prizes on the day!!!

 

Kids Colouring Competition with Dulux Toy Prizes and more!

Product Demonstrations

Hot & Cold Food and Drink Available

Kids Jumping Castle indoors for play time fun whilst the grown ups browse

Balloon Popping Fun

Much more, all on the day 07:30am until 1pm Saturday 1st September 2012 in our Vereeniging Store on the Houtkop road.

 

To keep up to date, get some free coupons and special offer news please join our free newsletter from our site right here!

 

Prepare for new plaster, concrete and brickwork

Preparation of new plaster, concrete and brickwork.

Plaster

The problems that occur most often are plaster cracks. The following factors may be the possible cause of cracks in plasterwork: earth movement and settling; fast curing due to lack of moisture; a strong plaster mix, or a weak plaster mix; poor sand quality.

Cracks will re-open after painting and cause paint systems to fail, and moisture ingress may cause damage to the substrate. We recommend that the SABS, or similar regulating association inspect and analyze suspect plasterwork. The Master Builders Association also provides an advisory service.

Hair Cracks (-0.2mm): Remove dust and debris. Brush Dulux Rainshield well into the cracks with an old small brush to fill and bridge the cracks.

Plaster cracks (+0.2mm and -2mm) are to be raked out with a scraper blade. Remove dust and debris. Brush Dulux Rainshield well into the cracks with an old brush to fill and bridge the cracks. Repeat if necessary to fill in the cracks completely.

Walls with extensive “map-crazed” cracks: After all cracks have been cleaned and filled, coat the entire wall from corner to corner with Dulux Rainshield (exterior), or Dulux Trade Plaster Primer (interior). Alternatively, apply plaster/adhesive slurry from corner to corner.

Large structural cracks (+2mm), and holes must be opened out with a carborundum disk in a V-shape to 3mm or larger. The cleaned cracks should be wetted, and then filled with a damp cement/sand mortar with a ratio of 1:4. The in-fill mortar should be properly compacted into the cracks. Apply Dulux Rainshield well into and around filled area to provide a flexible bridge.

Movement cracks at abutting walls. Cut open and clean away dust and debris. Fill with flexible filler such as single pack polyurethane sealer plus backing cord. In boundary walls, treat cracks with sealer and backing cord on both sides.

Spalling/Delaminating plaster: Plaster of which the adhesion is suspect over large areas (larger than 300mm diameter) must be removed down to sound brickwork, and re-plastered.

Holes and imperfections: Patch-repair and smooth over with white cement-based crack filler. Repaired patches must always be primed/sealed to prevent dull, rough spots where the crack filler has absorbed the binder in the topcoat.

Efflorescence and lime bloom are a result of water within the structure, dissolving salts and lime, then evaporating and leaving a white deposit on the surface. It should be brushed down and wiped with a dampened
(not wet) sponge. The brushing/wiping must be repeated as often as the deposits appear. Painting must not commence until efflorescence has ceased.

 

Concrete

Ensure surfaces are clean and free of dust and debris. Remove any uncured cement, grease, and mould-release agents by washing with a strong solution of sugar soap. Rinse off thoroughly with clean water.

Blow holes and cracks wider than 0.3mm should be filled with pure acrylic mastic, such as Acryl-W.

Pre-cast concrete slabs: Acid etch the surface with a solution of hydrochloric acid to remove laitance, uncured cement, etc. as follows:
Use one (1) volume hydrochloric acid to two (2) volumes water. More than one application may be necessary to achieve a paintable surface.
N.B. Hydrochloric acid is corrosive – please wear protective clothing, gloves, masks and eye goggles against splashes. Allow the acid solution to react for 15 minutes and then wash away all acid with copious amounts of clean water. Remove excess water and allow thorough drying – no more than 12% moisture content.

Brickwork

New brick and stonework must be allowed to weather (dry out) for 1 – 2 months.

Any loose residue such as builder’s plaster must be removed with either Mortarclean or weak spirit of salts. Hose surface thoroughly and allow drying for 24 – 48 hours.

Efflorescence and lime bloom are a result of water within the structure, dissolving salts and lime, then evaporating and leaving a white deposit on the surface. It should be brushed down and wiped with a dampened
(not wet) sponge. The brushing/wiping must be repeated as often as the deposits appear. Painting must not commence until efflorescence has ceased.

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