What are the pitfalls in the decoration process?

This friend seems to want to decorate recently, so he is worried about the tricks in the decoration. Ha ha, just give a few examples, pay attention to:

1, decoration quotation, pay attention to the accounting of engineering quantity, many decoration companies will make the engineering quantity small first, and then increase the project in actual construction to increase your budget;

2, material selection: do it yourself when you have time, don't trust the recommendation of the decoration company too much, many friends have been fooled, shoddy, short of weight;

3, environmental standards: it is very important to do environmental testing after decoration and installation, otherwise a house with tens of thousands of dollars will become a gas room, and no one can stand it;

4. Maintenance: Many companies leave 5% quality guarantee money in their contracts, which they actually don't want, so the maintenance must be clear and try to find a reputable company like Siyiju.