SOLVING PAINT PROBLEMS

Avoiding Painting Disasters
  • Use only good quality paint manufactured by a reputable manufacturer that provides customer back-up, guarantees and detailed application instructions.
  • Carefully follow the application instructions provided by the manufacturer.
  • READ THE INSTRUCTIONS BEFORE YOU PAINT.
  • Surface preparation is essential. In 9 out of 10 cases of painting disasters, the paint is not to blame but the preparation, application or poor workmanship is. On average 5 hours of preparation is required for every 1 hour of painting. Do not paint over unsound surfaces. Ensure that surfaces are dry and free from dust, grease, oil, algae, fungus, loose particles, flaking, chalking, efflorescence, damp etc.
  • Paint only adheres well to clean, dry, properly prepared surfaces.
  • Use the right undercoat. Adhesion problems will result when a good quality final coat is painted over a cheap undercoat
  • Ensure that the proper film thickness is applied (this is the actual amount of paint applied to the surface).
    THIS DIRECTLY RELATES TO THE DURABILITY OF THE PAINT SYSTEM.
  • Ensure that the paint specification is suited to the surface to be painted. Good quality paint used in a wrong application is money wasted. USE THE RIGHT UNDERCOAT AND PAINT ON EACH SURFACE.
  • The function of paint is firstly to protect your property and thereafter to decorate and beautify.

 

When using a contractor apply the following rules:

  • Choose a reputable contractor that is in the possession of suitable qualifications, knowledge and practical experience. Beware of roadside painters.
  • Enter into written contract with your painter.
  • In the contract thoroughly describe the work to be done, the paint to be used, the overall cost of the job and the payment schedule.
  • Ensure that the contract places the onus on the contractor to make good any defects which appear during THE DEFECTS LIABILITY PERIOD. This should be for at least a 6 month period and should be for the contractors cost.
  • All terms and conditions of guarantees should be stipulated.
  • Include a dispute settlement clause.
  • Regularly check that the contractor has done the proper preparation and applies the number of undercoats and final coats stipulated in the contract.
  • There are too many unscrupulous contractors in the market place.

 

REMEMBER

  • Ensure that you purchase the best quality products from a reputable company like Stevensons Paints.
  • Using the right paint, the right contractor and following the right application specifications, you avoid PAINT DISASTERS.
  • In 9 out of 10 cases of “Painting Disasters” the paint is not to blame, but the preparation, application and workmanship.

 

New Galvanised Roofs
Clean with Fast Galv-Prep.
Do water break test to ensure all oil is removed.
Prime with 1 coat Stevensons DMC 100 Etch Primer (solvent base) – Must be overcoated within 2 hours.
Apply two coats unthinned Stevensons Roofmaster.

NB: ALL new galvanised or mild-steel that is painted with Acrylic Roofpaint must be primed with one(1) coat solvent based Etch Primer ie Stevensons DMC 100 Etch Primer.

Painting roofs? Take note of the following
  • Due to the harshness of the African sun, of all paint applications, painting a roof is the most critical.
  • 50{300e2d6704ebd047e8afcefbdde21b344c63e067e80f0e409ae0a71cc54724dd} of all paint failures have to do with painting roofs.
  • Two common reasons for paint failures have been identified:
    • Poor surface preparation
    • Film thickness (amount of paint applied to the surface) too low

Overcome these problems

Surface Preparation

  • Make sure that all the surfaces are clean and free of loose particles.
  • NEVER paint over surfaces on which the paint is failing. The areas which seem to be sound are already weak and will soon fail. The new paint will tend to pull the old paint off.
  • Inspect the surface properly before painting. Once the new paint is on, it is no longer possible to do an accurate assessment and your painter may assure you that all is well when in fact it is not.
  • Get separate quotes for surface preparation and painting. The cost of labour, preparation and application usually contributes more to the total cost than the paint does.

Film Thickness

  • The most common problem is that only one coat is applied but you are told that two coats have been applied. The worst problem occurs when water is added to the paint and only one coat is applied.
  • Solution:
    • two unthinned coats must be applied.
    • use a first coat and then a different colour as a final coat.
    • do inspection between coats.
  • This procedure will ensure that two even coats are applied over the whole surface with no areas missed

NB: Most old paint systems fail because they are left too long. A maintenance coat applied in time will rejuvenate a roof for another five years at 20{300e2d6704ebd047e8afcefbdde21b344c63e067e80f0e409ae0a71cc54724dd} of the cost of a complete redoing of the roof (ie stripping old paint and painting two coats). A maintenance coat which is timeously applied adds to the film thickness of the paint system and therefore adds to the durability. A paint system left too long loses this vital advantage

Previously Painted Roofs
Paint in good condition (waterbased acrylics)
Wash down surface with water, allow to dry.
Apply 2 coats unthinned Stevensons Roofmaster.

Paint in good condition (alkyd and enamel paint)
Sand lightly to create a key for adhesion.
Wash down surface with water, allow to dry.
Apply 2 coats unthinned Stevensons Roofmaster.

Paint flaking or peeling
Remove all paint completely.
NB: Do not paint over this old paint as the new paint will remove the disintegrated old paint, causing old and new paint to peel off together.

Paint chalky, powdery (not peeling)
Brush down chalky, powdery surface.
Wash down thoroughly with water and allow to dry.
Apply 1 or 2 coats Stevensons Bonding Liquid as required.
Apply 2 coats unthinned Stevensons Roofmaster.

Cement Roof Tiles
The most critical part of painting cement roof tiles is the surface preparation. Poor preparation is the main cause of coating failure.
Thoroughly wash using water and a hard brush to remove loose sandy particles.
Coat tiles with Fast Plasterbond to provide a sound base for the Paint – allow 1 hour to dry.
Apply 2 coats unthinned Stevensons Roofmaster.

Walls
Newly plastered walls

  • Ensure surface is dry and in sound condition, free from dust, loose particles, grease, oil etc.
  • Prime with Stevensons Pigmented Plaster Primer (exterior).
  • Prime with Stevensons Trade Hikote M10 (exterior).
  • Prime with Stevensons Bonding Liquid (gypsum plaster or fibre cement).
  • Apply 2 coats unthinned finishing paint.

 

Previously painted surfaces

  • Remove dirt and all flaking paint.

 

Gloss and eggshell enamel paints

  • Sand well, clean; apply 1 coat Stevensons Universal Undercoat.

 

Matt paints

  • Clean well.

 

Chalky surfaces

  • Wash with water and allow to dry.
  • Apply 1 coat Stevensons Bonding Liquid.

 

Poor condition surfaces

  • Strip down and treat as new surface.
  • In each of the above, finish with 2 coats unthinned finishing paint.
Waterproofing
  • Use a high solids quality waterproofing.
  • Cheaper low quality waterproofing contains high volumes of water.
  • The water evaporates, leaving little if any protection.
  • On average waterproofing costs represent a fraction of the total cost of painting yet the majority of all painting complaints relate to waterproofing problems.
  • Do not economize in this area.
  • Leaks can cause major problems and incur high costs
Weathered Galvanised Roofs
Rust and oxidation must be mechanically removed.
Apply Fast Deoxidene (follow instructions).
Apply Fast Grease Buster (follow instructions).
Wash down thoroughly with water and allow to dry.
Apply 1 coat Stevensons DMC 100 Etch Primer.
Apply 2 coats unthinned Stevensons Roofmaster.

CONTACT US

ADDRESS

37 Tobie St

Simarlo, Centurion

Gauteng

0172

POSTAL ADDRESS

Postnet Suite No. 24

Private Bag X132

Centurion

0046

TELEPHONE

Tel: +27 12 653 4222

Fax: +27 12 653 4225