The outer wall of the house was damaged. Should the property agree to go out from my window sill for maintenance?

You should agree, and according to relevant laws and policies, you should cooperate in property maintenance.

According to Article 88 of the Property Law, if the real estate owner needs to use the adjacent land or building for building, repairing buildings and laying wires, cables, water pipes, heating and gas pipelines, the land or building owner shall provide necessary convenience.

If you use your windowsill as a channel for maintenance personnel to carry out property maintenance on the external wall of the building, you should give necessary convenience according to law.

If the maintenance affects your home or causes economic losses, you can also require the property to compensate according to the loss according to the provisions of Article 92 of the Property Law.

It is proposed in the property law that the neighboring owners of real estate should correctly handle the neighboring relationship in accordance with the principles of favorable production, convenient life, solidarity and mutual assistance, and fairness and reasonableness.

Today, you give others convenience, and when you encounter difficulties, others will give you convenience and help. The property maintenance of the external wall is not only for others, but also for you. After all, building exterior walls is a part of everyone's home and family.