Timber for exteriors without maintenance: Technological advances for facades

Numerous vernacular architectures exemplify the use of timber as an exterior cladding. From Swedish fishermen’s cabins to American country houses with horizontal slats, these constructions reflect the versatility of timber both structurally and as a finish. Although contemporary architecture continues to appreciate the nobility of this material, its use in large-scale projects has diminished due to high maintenance requirements. However, thanks to technological advancements in construction and architecture, natural timber can achieve resistance levels comparable to other contemporary materials. In this article, we will analyze the main options for timber, with and without maintenance, evaluating their durability and aesthetic impact.

Solid Wood

Solid timber, a classic and natural option for exterior facades, is characterized by its durability and aesthetic warmth. Species such as cedar, larch, and oak are known for their resilience in outdoor environments. Despite its appeal, this option requires constant care. To preserve its color and prevent moisture damage, it is necessary to apply UV protectants, oils, or varnishes every 2-3 years. Although it demands more maintenance compared to other alternatives, it remains a popular choice due to its natural appearance.

Thermally Treated Wood

Thermally treated timber is a more resilient alternative, thanks to its heat treatment process that enhances its stability without the use of chemicals. It requires less care than solid timber, although it is advisable to apply protectants every 2-4 years to maintain its original color. Compared to other options, it offers reduced maintenance, making it an attractive solution for those seeking a natural timber aesthetic without compromising durability.

Laminated Wood

Laminated timber, formed by layers of glued timber, stands out for its greater stability and resistance to deformation, making it an excellent option for exteriors. Despite its advantages, it also requires regular protection against the elements. It is recommended to apply oils or varnishes every 2-3 years to prevent discoloration and ensure its durability. While not completely maintenance-free, it provides greater stability against the harshness of the weather.

Acetylated Wood

Acetylated timber is notably more resistant than the previous options. Its acetylation process significantly improves its resistance to moisture, decay, and deformation. With minimal care required, applying a UV protectant every 5 years is sufficient to keep it in optimal condition. Although the acetylation process considerably enhances its properties, it does not eliminate the need for maintenance entirely.

Parklex Prodema Wood

Parklex Prodema panels, which combine a layer of natural timber with a phenolic resin protection, are unique in their category. Unlike other timbers, they do not require varnishing or oiling. A simple cleaning with water and soap is sufficient to maintain their appearance. Moreover, they are highly resistant to UV rays, moisture, and temperature fluctuations, ensuring they do not fade or deform over time. These panels represent an ideal solution for those seeking a natural timber option for exteriors without the burden of constant maintenance.