THE MOST COMMON PAINT PROBLEMS AND HOW TO AVOID THEM
While many of us decide to take on the task of painting our own homes, we don’t usually consult with professionals beforehand. This means that the final product is often different from what we expect, usually for reasons that we cannot fully understand. From polishing the walls, choosing finishes, to choosing the right colors, there is plenty of room for mistakes without proper guidance. Therefore, with the right set of guidelines, there is an easy way to avoid making the same painting mistakes in the future. the most common painting problems people face, and tips and tricks on how to avoid them.
If you observe bubbles forming from the underlying surface of your wall paint, this is blistering. Blisters are caused by moisture being drawn out from the surface that the paint is applied. It can be caused by painting when humidity is high, applying paint to a damp surface or re-coating too quickly. Insufficient surface preparation also increases the occurrence of blisters.
Avoid painting under extreme humidity or if a high dew point is present. Make sure your surface is dry and free of moisture before the paint application. Allow adequate drying time before re-applying paint. If the blisters go down to the surface, then moisture is a problem. In this case, it is highly-recommended to install vents and exhaust fans in affected areas. Choosing the Correct Primer Undercoat for the type of surface to be painted is your best chance of success may be the difference between success and failure.
CRACKING / FLAKING
Use of lower quality paint that has inadequate adhesion and flexibility, over thinning or overspreading the paint.
Inadequate surface preparation, or applying the paint to bare wood without first applying a primer.
Excessive hardening of enamel/oil based paint as the paint job ages.
Remove loose and flaking paint with a scraper or wire brush, sanding the surface and feathering the edges. If the flaking occurs in multiple layers of paint, using a filler may be necessary. Prime bare wood areas before repainting. Use of a top quality primer and top coat should prevent a recurrence of the problem.
An unexpected and undesirable result of interior painting that people often experience is blocking, which is when two painted surfaces stick together, such as a door sticking to the jamb. Possible causes include: using substandard gloss or semi-gloss paints or not allowing the painted surfaces to dry thoroughly before closing windows or doors.
The most reliable way to prevent blocking is to use top quality gloss or semi-gloss acrylic latex interior paint and carefully follow directions regarding drying times. Persistent blocking can be relieved with talcum powder.
A variety of factors contribute to efflorescence, including:
- insufficient curing time for cement or mortar during construction;
- moisture migration from inside the house;
- groundwater penetration from an inadequately waterproofed basement;
- insufficient surface prep to remove previous efflorescence; and
- painting over holes, cracks, or unrepaired pointing.
Tackle efflorescence on a warm, dry day. Eliminate excess moisture conditions externally by waterproofing and repairing cracks, repointing, and sealing around windows and doors with butyl rubber caulk. There are various ways to remove efflorescence, and you may need to use a combination, depending on the extent and severity: a wire brush, scraper, low-pressure washer, and/or cleaning with diluted white vinegar or a trisodium phosphate (TSP) solution (wear protective gear when working with this chemical) and then rinsing thoroughly. Applying an impregnating hydrophobic sealant to a building material surface can prevent water absorption and keep moisture from entering the material. Colorless water repellents may prevent efflorescence from recurring, as may silicone or acrylic coatings. Allow to dry completely before repainting.
Paint naturally expands and contracts in response to temperature fluctuations and, over time, loss of elasticity can result in alligatoring. The process can be hastened through such missteps as applying a rigid coating such as oil enamel over a softer, more flexible coat (e.g., latex paint or latex primer); painting over a glossy finish (the top coat not bonding properly to the glossy finish); or not allowing sufficient dry time between primer/basecoat and topcoat. The process can be hastened through such missteps as applying a rigid coating such as oil enamel over a softer, more flexible coat (e.g., latex paint or latex primer); painting over a glossy finish (the top coat not bonding properly to the glossy finish); or not allowing sufficient dry time between primer/basecoat and topcoat.
- Remove unsightly scales by scraping, sanding, applying chemical removers, or using a heat gun.
- Then rinse to banish dust and let dry completely. Prime, allow to dry, and repaint.