Choosing the Right Size of Weathervane for your Roof

Weathervanes come in various sizes (and prices). There are some ground rules for choosing a weathervane for your roof. Here is a guide to choosing the right size of weathervane for your rooftop.

Weathervanes generally come in three sizes – small, standard, and large. The basic rule for selecting the right size is that a weathervane, just like anything else, looks smaller as you go farther away. Thus the smaller the weathervane, the closer it should be to the ground.

The next thing to consider is whether you would like to go with a cupola or not. A cupola is a small structure built on top of the house that “crowns” the roof. The weathervane can be either mounted on the cupola, or can be directly mounted on the roof. The pictures below depict weathervanes mounted on a cupola and directly on the roof.

Weathervane mounted
on a Cupola

With a cupola: If you choose to mount your weathervane on a cupola, then you need to first choose the right size of the cupola for your roof. The rule of thumb is: For every foot of roof line, you should have 1"-1.25" of cupola width. So, measure the roof line of your building and multiplies it by 1"-1.25". Once you are done with selecting the cupola, go for a weathervane that is roughly the same size of the cupola, or within ±6 inches. Thus, if you settle on a 22” cupola, then go for a weathervane size between 16” and 28” long.

Weathervane directly mounted
on the roof

Without a cupola: if you want your weathervane to be mounted directly on the roof, then use the rule of thumb rule as mentioned above for the cupola - "Every foot of the roof line should account for one inch of the weathervane". Most people find that adding a little extra to this looks even better. Thus, for a roof line that is 32 feet in length, a 36” weathervane would create the right effect. If your building has more than 3 stories, go for the “next size up”.

In general, a small sized weathervane fits perfectly with a small building structure such as a car garage, a utility shed, or a gazebo. The standard size goes well with one-storied, medium sized houses, and small barns. The larger ones are best suited for large houses, two or more story structures, or modern-day residential or commercial buildings.

For very long rooflines, more than one weathervane may be more suitable, placed comfortably apart from each other. For example, a 60 foot long roofline can accommodate two 30”-36” cupolas, with each different weathervanes on top.

Stick to these rules of thumb, and select the best size of weathervane for your house. Give your house a distinct look with weathervanes, and enjoy the appreciation from friends and strangers alike!