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Surface Defects and Painting Problems when using Paints
All You Need to Know About Paint
Surface Defects when Painting
Efflorescence
Efflorescence is a white fluffy surface deposit that is caused by salts in the plaster being drawn to the surface. The moisture evaporates and the efflorescence appears. Dry brushing will remove it.
(Do not wash with water, as this will aggravate the problem). For the first coat, if it is a new surface use latex, if an old surface use latex or alkali-resiting paint.
Mould or Fungus
Mould or Fungus is multi coloured or patches on infected areas. The cause is airborne spores feeding and multiplying on the organic matter in the paint together with poor ventilation, dampness and condensation. The best form of prevention is to find the cause of the dampness and correct it. Sterilise with a fungicidal solution then check for the problem reoccurring. Then paint with fungicidal paint.
Coating System DefectsBlisteringBlistering is bubbles or blisters in the paint film. It is caused by water vapour being attracted by heat and forming spaces beneath the film, or resins from knots in the timber being attracted to heat, or paint being used on surfaces which have extreme heat. To prevent this problem, make sure that the substrate is completely dry before painting. Remove any knots and replace with plugs. Use heat resistant paints for areas that have extreme heat. Select light paint colours as they reflect more heat. ChalkingChalking is a powdery deposit being formed on a dry paint film surface. The powder is unbound pigment. This is caused by painting over surfaces that haven't been sealed sufficiently, or the paint is deficient in binder, caused by over thinning. When using interior paints on exterior surfaces it can also occur. To prevent this always seal surfaces correctly and only thin paint to the specifications. |
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Checking, Cracking, Crocodiling, AlligatoringChecking, Cracking, Crocodiling, Alligatoring are all names for splits that appear in the film of the surface coating. It is caused by the use of excessive dryers or recoating before the under coat is dry. To prevent this add only a minimum amount of dryers and allow the specified time to dry between coats - don't rush! To Continue Articles on Interior Design and Decorating Interior Finishes - All You Need to Know About Paint - next page is Breakdowns or Defects - 2 Paint Composition DIY Tips for Perfect Paint Jobs More Interior Decorating Finishes - MenuPaint manufacture, recognising painting defects, specialist paints Introduction to metals, types of metals, ferrous metals, non ferrous metals Decorative Painting, Faux Finishes, Decorative Finishes Different types of fabrics, their definitions, the fibers used in making fabrics |
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Interior Design Finishes - Carpet Contents | Home Paint Information | More Paint Information | Wall Hangings and Flooring | Types of Timber | Metals | Timber Uses | Decorative Painting | Types of Fabric | Introduction to Interior Finishes | Carpet | Paint | Wall Hangings | Timber Flooring | Hard Flooring | Clay Based Flooring | Stone Flooring | Semi Hard Flooring | Types of Timber and Wood | Metals | Timber and Wood | Decorative Painting | Fabric Types |
Interior Design Finishes - Carpet Contents | Home Paint Information | More Paint Information | Wall Hangings and Flooring | Types of Timber | Metals | Timber Uses | Decorative Painting | Types of Fabric | Introduction to Interior Finishes | Carpet | Paint | Wall Hangings | Timber Flooring | Hard Flooring | Clay Based Flooring | Stone Flooring | Semi Hard Flooring | Types of Timber and Wood | Metals | Timber and Wood | Decorative Painting | Fabric Types |
