Sydney ladders are valued because of their portability, strength and resistance to wear and tear. The thing about aluminum ladders is that it can pose a threat to one's safety as it is a good conductor of electricity. Aluminum is a malleable iron hence, it easily bends under pressure. It can become twisted and unstable over time. If you have an indoor or outdoor work, you may use this type of ladder for as long as you stay away from power lines and corrosive salt water.
If you have a lot of money to spend, go for a ladder that is made of fiberglass. It is durable, safe and it is a poor conductor of electricity, just like your wooden ladders. Therefore, you can use it while doing outdoor work and roofing. It is also resistant to damage caused by insects and weather. However, fiberglass is not lightweight unlike aluminum. If the ground slopes away from the building, place something heavy at the base of the ladder or tie a lower rung to a fixture. If the ground is uneven but solid, use a wedge to get a level base. Provide a wooden board or something similar to make a firm base if the ground is soft or of loose material.
If you have a lot of money to spend, go for a ladder that is made of fiberglass. It is durable, safe and it is a poor conductor of electricity, just like your wooden ladders. Therefore, you can use it while doing outdoor work and roofing. It is also resistant to damage caused by insects and weather. However, fiberglass is not lightweight unlike aluminum. If the ground slopes away from the building, place something heavy at the base of the ladder or tie a lower rung to a fixture. If the ground is uneven but solid, use a wedge to get a level base. Provide a wooden board or something similar to make a firm base if the ground is soft or of loose material.