This is my first new topic here I think.
I just wanted to ask someone who may know this issue...
This is the picture I have taken from the house that next to mine.
They are on top of the roof, outside the house.
I just need to know are these metal pipe thing (like a vent for the house), are they optional? Like you have to ask the builder to add them to your house?
Because no one asked me if I wanted to add or not
![Confused :?](./images/smilies/icon_confused.gif)
![Shocked :shock:](./images/smilies/icon_eek.gif)
![Shocked :shock:](./images/smilies/icon_eek.gif)
And are they essential to the house?
![Confused :?](./images/smilies/icon_confused.gif)
Thanks for help!(hoping the picture works)
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