Posts for a horizontal fence should be no more than 6 feet apart. Wood pickets are not as strong when mounted horizontally as when mounted vertically. As such, the fence panels on a horizontal fence can’t cover the same span between posts as a vertical fence can. If you install the posts further apart on a horizontal fence, the fence will lose stability, making the boards more likely to sag. 

If possible, it is beneficial to paint both sides of your fence to protect the fence more completely from the elements. Painting both sides of your fence will create a more consistent appearance as well. However, the time and cost involved in painting both sides of the fence may cause people to paint only the side they see.

Paint your fence, install customized fence slats, or attach a bamboo screen for a more appealing yard aesthetic. Paint can give your yard a unique and fun look, and adding fence slats gives you a classic fence appearance. Bamboo screens are probably the most unique option that can add a fun vibe to your space.

Who pays for a new fence between neighbors depends on its location relative to the property line. If you build the fence entirely on your property, you are solely responsible for the costs of installation, maintenance, and repair. If the fence is built directly on the property line, both neighbors are typically responsible for the costs. In this case, it is essential to consult with your neighbor beforehand to agree on a plan for payment. While you should always inform your neighbor of your plans in advance, you generally cannot force them to contribute financially unless there are specific local laws, such as in California, where both parties might be responsible for costs unless a different agreement exists. It's a good idea to get a property line survey to know the exact boundaries before building.