Wood is a construction material with multiple benefits. It has a high strength to weight ratio, is workable and versatile and has excellent environmental benefits; among all construction materials, wood uses the least amount of energy to process and manufacture. Global demand for better practices and greener construction materials is pushing the limits of timber as a mainstream construction material for medium and tall buildings. Engineered Wood Products (EWP) have resolved the ancient wood challenge of anisotropy as they are more structurally effective and homogeneous. Laminated veneer lumber (LVL) is a type of EWP that uses multiple parallel grain layers of thin wood assembled with adhesives to obtain lumber-size thickness. The design of LVL products is a multi-criteria problem, where numerous design considerations must be explicitly accounted for, e.g. structural performance, durability, manufacturing, or fire safety. The manufacturing process of LVL products can be tailored to suit those different design goals. For instance, blending different wood species, altering the thickness of the veneers, or even using other adhesives might be a sound approach to enhance fire performance and minimise production costs.This research aims at studying the fire performance of multiple LVL products under fire conditions. To do so, a methodology to characterise the fire performance of LVL is developed and applied as a parametric approach for nine different lay-up types manufactured from rotary veneers of five different timber species and three different adhesives. Six LVL products were single species, and the other three were manufactured by blending species in various configurations.The methodology follows the performance-based design principles organised as the evolution over time of a compartment fire (growth, fully-developed and decay phase). It identifies the variables affecting the performance related to the fire safety objectives at every stage of the fire curve. A fire to occur requires ignition and spread while releasing heat at a rate; those parameters influence the tenability during egress, hence the life protection. Once the fire is established, mass loss rate and charring rate parameters are essential to assuring compartmentation and structural stability during the fully developed phase. Burnout affects the continuity of operation; the critical mass for extinction parameter needed to be assessed to define the decay phase. Furthermore, studying the thermophysical properties and thermal degradation characterisation of the nine LVL products and their components (timber and adhesive) was required to explain some of their different fire performances. This research identified some clear patterns in its outcomes. The white cypress single-specie softwood LVL product presented substantially better fire performance than the other softwood LVLs. The flame spread studied on seven LVL products resulted in an unexpectedly low flame spread parameter for white cypress single-specie LVL product, almost five times lower than for hoop pine single-specie LVL, another softwood LVL with the same adhesive. The thermal degradation analysis obtained for their two timber species showed a much higher hemicellulose and extractives content for white cypress than for hoop pine, which might explain the unexpected results.One of the most exciting results of this research is how the blended-species products behave in a mixed way, honouring their original components. Although their outer layer defines the ignition time and its flame spread for these LVL products, the mass loss, heat release, and charring rates presented an identifiable mixed pattern from their components. For instance, the LVL product with an alternative layer configuration of spotted gum and hoop pine showed a heat release rate per unit area curve with a double initial peak followed by a drastic fall, just as in the single species hoop pine test. At the same time, it took much longer to create the char layer, so the peak was broader, as in the single-specie spotted gum test. It also reproduced the oscillating behaviour of the softwood trend but with more extended wavelength periods, as just every second layer was softwood. This mixed behaviour repeated for every blended-species products. Delamination is an unwanted outcome that emphasises that the adhesive must be carefully chosen for a tailored LVL. Six of the LVL studied used the same adhesive, a melamine urea-formaldehyde, but they presented a different bonding behaviour when subjected to fire. During the cone calorimeter tests, the hoop pine single-specie LVL product showed a clear delamination pattern. In contrast, the delamination was not apparent for the spotted gum and the white cypress single-specie LVL products. The three blended-specie LVL products that contained hoop pine presented the same debonding behaviour. Hoop pine had the lower density of all the timbers used, which may explain a more significant shrinkage and the consequent debonding. The fire performance analysis focused on using standard test methods defined by the Australian Standards (AS) framework categorise the LVL’s fire performance products into Material Groups. Beyond the AS framework, this research provided further detail on the dissimilar fire performances between LVL lay-up configurations. The results showed that all LVL were categorised in Material Group three as per AS 5637.1 standard. The additional fire performance assessment showed differences between all the materials analysed, where the single-species spotted gum LVL showed the best performance.This work brings a practical methodology for a performance-based design that includes LVL timber elements and, as a result, the possibility for an optimised LVL product to achieve quantifiable and acceptable fire safety levels.