Select Tight Knot Timber Guide

The Modinex Group are experts in Western Red Cedar and one of the more desired ranges within the WRC family is the Western Red Cedar – Select Tight Knot Species. Below you’ll find benefits, technical information and FAQs that cover just about everything you would need to know about the Western Red Cedar Select Tight Knot Species range.

Western Red Cedar – Select Tight Knot Benefits

Whilst Western Red Cedar is known as one the world’s most durable and beautiful softwood species, the Select Tight Knot species is even more special because of their visible age knots, giving them a more natural aesthetic when compared to regular Western Red Cedar.

Western Red Cedar Select Tight Knot Group Rating

The Select Tight Knot variation achieves a Product Group Number Classification of 3.
Internally, the Select Tight Knot timber can be used for a range of uses like interior walls and panels. Externally, other materials can be utilised to achieve Bushfire Attack Level of 12.5, enabling the use of WRC Select Tight Knot above the area of concern.

Fire Test Certificate
Fire Test Report

Thermal Protection

Western Red Cedar – Select Tight Knot is both practical and eco-friendly. Due to its low density, Select Tight Knot is a perfect insulator when compared to other building materials like brick, concrete and steel. That means that in summer, Select Tight Knot keeps buildings cool, whilst in winter can maintain internal heat. This results in reduced energy usage and contributes towards a higher Green Star building rating.
The Knotty grade timber possess the same thermal properties as the Western Red Cedar that include:

  • A thermal conductivity factor K of 0.74 BTU in / ft2 h F.
  • An R-value of 1.35 per 25mm of thickness.

Technical Information

The Knotty Grade – Western Red Cedar just like the WRC species grows in British Columbia and some of the nearby western states of the USA. A versatile timber, it is commonly used for applications such as interior and exterior lining, feature walls and garage doors among other applications. Renowned for its natural beauty and durability. This exceptional wood has rich tones ranging from mellow ambers, to reddish cinnamons and sienna browns. Its texture is uniform and fine-grained, with visible age knots that provide a beautiful design feature. Its superior resistance to warping, cupping and twisting makes it ideal for use in cladding, panelling and screening.

WRC Select Tight Knot timber flooring and interior panelling

WRC Select Tight Knot FAQS

What are wood knots?

Wood knots are those dense, visible imperfections you can spot in timber. They are noticeably darker than the rest of the wood and commonly circular in shape, which results in the beautiful and natural patterns you see in timber.

What causes wood knots?

Wood knots form from the base of a branch that has been engulfed by the growth of the tree. As the tree grows in size, smaller branches often die as they don’t receive as much sunlight as higher and larger branches. As these branches can be quite strong, rather than falling off, the tree will just continue to grow around these branches, which results in the wood knots you commonly see in sawn timber.

Why are wood knots so hard?

Wood knots are so hard because of how dense these sections of timber can become. The grain of wood knots has no real alignment and runs in multiple directions, which results in a compressed and dense timber.

Still Have Questions About Select Tight Knot?

No problem. We’d be happy to answer any more questions you have – please feel free to send us an email or give us a call. Our friendly team are on hand to help you out and get all the knowledge you need to help complete your next project.