What kind of material is better for balcony closure, and how about the sound insulation effect?

You can choose the one that is more applicable, such as solid wood windows or aluminum alloy, which is more cost-effective.

I think it's better to use manganese-magnesium-aluminum alloy profiles for balcony closure. It can also use plastic steel windows, solid wood windows, etc.

The balcony is closed with aluminum alloy doors and windows, but the sound insulation effect is a little unsatisfactory, if you want to have a good sound insulation effect, use wood.

If the balcony is closed, I think it can be made of concrete and aluminum.

Personally, I think you can use plastic steel windows, solid wood windows, etc. The door of the magnesium-manganese alloy material is also good.

If the balcony is closed, the sound insulation effect will be better if the material of the glass door is used.

I think it's better to use solid wood, it looks more natural, the sound insulation is average, and it can't be completely isolated.

Enclosed balconies are generally insulated with plastic steel windows, and the sound insulation effect should be made of soundproof glass or soundproof panels.

I think it can be closed with some stainless steel, and the sound insulation is not bad.

Generally speaking, it is recommended to use soundproof glass, which is better for sound insulation and does not affect the light.