Usage of timber in building construction has its advantages and disadvantages. One of the major disadvantages that the UBC building has probably encountered is the decay of timber. The causes of timber decay include fungi, bacteria and insects. Not to forget, the weather of the surroundings of UBC building. We all know timber is one of the organic materials in the construction industry. Like any other organic goods, humans do not consume cellulose and other fibre ingredients in timber, but fungi and insects digest them to produce nutritional products. As for insects, they drill holes and drive lines into the timber. Even more dangerous, fungi cause timber to partially decay and even decay completely which can wreck the UBC building and the uniqueness of using timber as their main material of the building.Besides that, another major disadvantage of timber in UBC building is the fungi. It is important for us to know some information on fungi for us to take precautions against the timber decay. Fungi has its own flattering temperature for them to reproduce and highly affects the quality of the wood inside and out. The temperature must be in the range of 20-30 to obtain the optimum growth of the fungi. Especially in the area of Brock Commons UBC, Canada with its throughout weather in and out, needs to take extra precautions as they can also tolerate in the temperature of 0-50. However, oxygen too is also vital for the growth of the fungi as when there is no presence of oxygen, fungi will not grow. Another disadvantage of timber is that it has the high risk of catching fire as wood is well known of its combustible material. It may burn up the whole building due to various possibilities. It could be the weather, any electricity leakage or any other flammable material that can cause fire. It will also affect the end user of the Brock Commons UBC building as it can endangers the life of students and staffs of UBC living in that building. It is unsustainable to make timber non-combustible. To prevent potential dangers, timber of this building can be processed in some fire retardants.Apart from that, is the cost of the material, installation and maintenance. Cost comparisons are tough to make between timber and other construction materials. Architects and engineers with less experience with timber construction more likely to increase the prices to recompense for the extra time they needed and to ensure that their design to build such buildings like the Brock Commons UBC building for their own uniqueness. It is known that timber is cost efficient as it is cheaper than any other materials but other factors like the availability of the material in the area is very low, then it also embraces the cost of the construction. Also, cost of timber varies by their types of timber used. The higher the quality grade of a timber, the higher the cost of construction. It does not only provide the quality and sophistication of Brock Commons UBC building but its maintenance are also less frequent. Lastly, is definitely their risk of condensation. As we all know, this is caused by the warm moist air produced by the surrounding of the UBC building and activities such washing and cooking. Timber buildings like Brock Commons UBC building is easily moisturised due to the rain or winter in Canada, which can cause the appearance of the building become less attractive and it can also change the authentic colour of the building structure.