How to avoid problems with glancing light
- Glancing light causes defects to magnify in any surface.
- Under certain lighting conditions, it is almost impossible to hide joins in plasterboard.
- Often glancing light problems are reduced once curtains have been installed .
- Take more care with areas prone to glancing light.
- Here are some areas that are prone to glancing light.
- Long walls such as hallways.
- Large flat ceilings with large windows at the end of the room.
- Ceilings near high windows.
- Walls near sky lights
- Stair wells
- Glare from floor tiles or even the next door neighbors roof!
- Down lights shining onto a wall
- Light stands reflecting into a corner
- The normal standard for plastering is known as level 4 finish.
- Level 4 finish is not good enough in glancing light areas if you want a near perfect finish.
- The solution is a level 5 finish (explained below)
- Plasterer would rarely include for a level 5 finish in their quote unless requested.
- Block or diffuse light source
- Use flat paint.
- Paint with a fluffy roller.
- Avoid dark colors.
- Apply a texture finish
- Use a level 5 plastering finish in effected areas.
- Create an opposing light source.
For more information on glacing light.
Level 5 finish
Even a completely flat join can show with the effect of glancing light. The reason for this is that the join has a different surface texture to the board. A level 5 finish creates a single wall texture, that will hide this effect.
To create a level 5 finish the joins should be finished off as normal, then a skim coat of top coat is applied to the entire surface. Then lightly sand back to a smooth even finish.
For more information on level 5 finish.