Maintenance of Finishings & Coatings
Because of the wide variations in:
- severity of exposure conditions
- variability of timber substrates
- care taken in the initial priming and finishing
- number of systems applied over a period of years
it is impossible to predict the service life of any coating system before complete re-coating is necessary.
Although on average, a period of 5 to 10 years may be expected for painted surfaces, and 1 to 5 years for clears and stains, it is more likely that specific areas, such as those adjacent to timber end-grain, window sills facing north, or sharp arrised sections, may need remedial coating before this time. In order to minimise such action, it is advisable to give those areas an additional coat, either primer, top coat or stain coat at the time of the initial application.
The opposite situation arises on areas which are well protected, such as under wide eaves or verandas. These areas may not need re-coating on each maintenance occasion and too great a build-up of coating materials could ultimately require major maintenance involving complete stripping before coating again.
Stains require more frequent maintenance but this is generally much easier to carry out both in terms of surface preparation and in coating application.
The presence of mould and mildew requires removal with fungicidal washes, and rinsing and drying before subsequent coats are applied. If this is not done, mould can spread between coats and result in discolouration.
While excessive paint film build up is to be discouraged, it is nevertheless most important to re-coat before general deterioration occurs.
The presence of mould and mildew requires removal with fungicidal washes, and rinsing and drying before subsequent coats are applied. If this is not done, mould can spread between coats of paint and result in lifting of the paint film and discolouration.
NOTE regarding Natural Weathering.
Irrespective of the application and the degree of exposure to which the installed product is subjected to, TIMBECK does not recommend leaving Western Red Cedar (or any other specie) unfinished to weather naturally.
This practice may be promoted and acceptable in other countries, but has been found to be detrimental to long term product performance under the harsh climatic conditions experienced throughout most of Australia.