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How To Paint Chalky Exterior Walls

Prepare, prime and finish weathered and chalky exterior walls with our 4-step guide below.

Exterior paints can develop a chalky powder over time as they weather and degrade from sunshine and moisture. Affected surfaces need to be cleaned and suitably prepared and primed for an optimum finish that will last for years.

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Zinsser Paint Chalky Exterior Walls Products

The Benefits

Step 1. Surface Preparation

Step 2. Patch Priming & Bring Forward

Step 3. Priming

Step 4. Decoration

More Information

Further Reading

Zinsser Paint Chalky Exterior Walls Products

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The Benefits

Zinsser work with contractors to create problem-solving products that meet “real world” challenges, providing tried and tested solutions to painting problems, such as painting weathered and chalky exterior walls.

Preparation is key when dealing with chalky surfaces; Zinsser products are cost effective and work quickly, sealing the surface and priming ready for redecoration. The finish coat, Zinsser Allcoat Exterior, has over 350 colours to choose from and is designed for up to 15 years long term decoration.

Paint exterior chalky walls for a smarter business image, standing out on the high street to invite customers and boost trade. A tidy appearance for schools, colleges and universities is paramount for attracting new students and keeping parents happy.

For landlords returning properties to market and homeowners looking to redecorate prior to selling, that tired, weathered exterior wall could be the difference between a sale or markdown on the asking price.

Step 1. Surface Preparation

Ensure nothing will interfere with adhesion of Zinsser products or materials to be applied; all surfaces must be clean and dry.

Loose material should be removed either by scraping or brushing with a stiff-bristled brush to a sound edge.

Moisture content should not exceed 12% prior to painting.

All visible signs of organic growth should be removed, using Zinsser Mould Killer & Remover to treat affected areas in accordance with the manufacturer’s instructions and allowing time to dry.

Use a suitable filler in accordance with the manufacturer’s instructions to fill cracks and small surface defects, allow to dry and then rub down with a fine grade abrasive paper, removing all dust before starting step 2 below.

Step 2. Patch Priming & Bring Forward

Zinsser Bulls Eye 1-2-3 Primer Sealer can be used to patch-prime bare and filled areas, allowing a minimum of an hour for drying (in normal drying conditions) and applying in accordance with the manufacturer’s instructions.

These patch-primed areas can then be brought forward with more Zinsser Bulls Eye 1-2-3 Primer Sealer and allowed to dry.

Step 3. Priming

All areas that are to be decorated can now be primed with one full coat of Zinsser Bulls Eye 1-2-3 Primer Sealer, in accordance with the manufacturer’s instructions, allowing another hour minimum drying time.

Step 4. Decoration

Decorate the prepared and primed surface with two full coats of Zinsser Allcoat Exterior Satin or Gloss in accordance with the manufacturer’s instructions, with a minimum of 1 hour drying time between coats (in normal drying conditions).

Zinsser Allcoat Exterior is an ultimate performance all surface paint designed for long term decoration (up to 15 years) with a choice of over 350 colours to pick from, providing a match for company branding or existing exterior décor.

More Information

If you require more advice on painting weathered and chalky exterior walls, give our technical team a call on 0113 2455450 (option 2) or send a message to [email protected].

Further Reading

More resources on the topic of exterior walls and surfaces:

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