Correlation of adhesive strength with service life of paint applied to weathered wood

Smooth-planed western redcedar bevel siding was exposed outdoors (preweathered) for 1, 2, 4, 8, and 16 weeks. The weathered boards were separated into two end-matched groups. One group was painted with only primer paint and tested for paint adhesion following preweathering. The second group was painted with a primer and topcoat, exposed outdoors for an additional 17 years, and evaluated during this period for paint cracking and flaking. There was a direct correlation between the amount of time the siding was preweathered and the long-term paint performance. Those boards preweathered for 16 weeks began to show cracking after about 3 years, whereas those boards that were not preweathered were in almost perfect condition after 17 years. Paint adhesion tests done on end-matched boards that were preweathered at the same time and then painted showed good correlation between the paint bond strength and outdoor paint performance for the preweathered boards. 2002 This article is in PDF format (file size: 537 kb). To download this article, right click on the link immediately below and choose "save target as". To view the article, left click the link immediately below.
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Correlation of adhesive strength with service life of paint applied to weathered wood   (2002)

Smooth-planed western redcedar bevel siding was exposed outdoors (preweathered) for 1, 2, 4, 8, and 16 weeks. The weathered boards were separated into two end-matched groups. One group was painted with only primer paint and tested for paint adhesion following preweathering. The second group was painted with a primer and topcoat, exposed outdoors for an additional 17 years, and evaluated during this period for paint cracking and flaking. There was a direct correlation between the amount of time the siding was preweathered and the long-term paint performance. Those boards preweathered for 16 weeks began to show cracking after about 3 years, whereas those boards that were not preweathered were in almost perfect condition after 17 years. Paint adhesion tests done on end-matched boards that were preweathered at the same time and then painted showed good correlation between the paint bond strength and outdoor paint performance for the preweathered boards.

Author: Williams, R.S.; Winandy, J.E.; Feist, W.C.

Source: Proceedings of the 9th Durability of Building Materials and Components Conference held 17-20, March 2002, in Brisbane, Australia. S.l. : s.n., 2002: 11 pages

Citation: Williams, R.S.; Winandy, J.E.; Feist, W.C.  2002.  Correlation of adhesive strength with service life of paint applied to weathered wood  Proceedings of the 9th Durability of Building Materials and Components Conference held 17-20, March 2002, in Brisbane, Australia. S.l. : s.n., 2002: 11 pages.