While pressure treatment can effectively protect wood from decay and insects, it is generally not advisable to pressure treat newel posts. There are a few reasons for this:
- Structural Integrity: Pressure treatment involves subjecting wood to high pressure, which can lead to compression or deformation. Newel posts, being integral to the stability of a staircase, need to retain their strength and shape. Pressure treatment may compromise the structural integrity of the post, leading to potential safety concerns.
- Aesthetics: Pressure-treated wood often has a greenish tint due to the chemicals used in the process. This may not be desirable for newel posts, which are often intended to be visually appealing and complement the overall design of the staircase. It is preferable to use a wood species naturally resistant to decay or apply a protective finish that preserves the natural beauty of the wood.
Alternatives to Pressure Treatment:
While pressure treatment may not be suitable for newel posts, there are alternative methods to protect them effectively:
- Natural Resistance: Some wood species, such as redwood and cedar, are naturally resistant to decay, rot, and insects. Choosing these types of wood for newel posts can significantly enhance their durability without the need for chemical treatment.
- Protective Finishes: Applying a high-quality protective finish, such as varnish or polyurethane, to the newel post can offer an added layer of protection against moisture, UV rays, and insects. Regularly maintaining and reapplying the finish over time can further extend the lifespan of the post.
- Elevating and Sealing: Elevating the newel post slightly above the ground or using a raised concrete pad can reduce moisture contact and minimize the risk of rot. Additionally, sealing the bottom portion of the post with a waterproof sealant or paint can help prevent water absorption.
While pressure treatment is a valuable preservation method for many wood applications, it is not appropriate for newel posts due to potential structural and aesthetic concerns. Instead, choosing naturally resistant wood species or applying protective finishes can effectively protect and prolong the lifespan of newel posts. Elevating and sealing the posts can further enhance their durability against moisture. By adopting alternative methods, you can ensure that your newel posts remain beautiful, stable, and resistant to decay and insects for years to come.