Acoustic Performance
Fire performance
Wood, when exposed to the heat of a fire, goes through a process of thermal breakdown to turn into combustible gases. Undergoing this process, a charred layer of charcoal forms on the burning surface of the wood which is the key contributing factor in timber’s fire resistance. This charcoal layer acts as an insulator protecting the inner core of the plywood, providing resistance against heat penetration and thus forces the wood to burn slowly; all the while maintaining the temperature of the inner, uncharred core low, enabling it to continue carrying its load for a longer period of time. Initially as the fire catches on, the rate of charring is fast but as the charcoal depth increases it provides a stronger protective layer to wood, slowing the overall combustion rate.
The self protecting nature of the charring layer increases the chances of a wood based structure surviving fire as the uncharred inner core remains unaffected, maintaining its strength & the structure’s stability.
Strength Performance
When it comes to strength, density of the wood is the single biggest influencing factor and while solid hardwoods are indeed dense, wood density can be increased even further as is done with various engineered wood products. Engineered wood products have come to define and standardize structural properties of wood making their characteristics such as strength and stiffness, measurable and reliable. With the latest developments in technology as well as adhesives, engineered wood products have come to offer a strong, reliable and cost effective solution for almost every structural application.
LVL, Glulam and CLT are but some of the product choices available that offer superior strength performing properties. Click on the links above to find out more about them.
Thermal performance
Thermal conductivity increases with density, and therefore amongst all the timber options, lightweight wood species are the best insulators. In addition, thermal conductivity varies slighty with moisture content and residual deposits in the timber such as the extractives.
In addition, wood framed buildings can accomodate extra insulation materials which can be placed in spaces between framing members without any increase in wall, ceiling, roof or floor thickness. The natural thermal properties of plywood also maximise the efficiency of insulation materials as wood doesn’t become cold or dissipate heat, therefore requiring less energy to maintain temperature throughout a building.