The rule of thumb for appropriate weathervane sizing is: Select a weathervane that is roughly the same size as the cupola base, give or take a couple of inches. For example, if you determine that a 22” cupola is needed for your building, choose a weathervane that is between 16” and 23” in length..
Similarly, you may ask, how do you size a cupola?
'For every foot of building width, you should have at least 1.25 inches of cupola'. So, measure the width of your building and times that by 1.25. This guideline is a minimum rule of thumb to get a cupola into proportion. Structures two stories and higher may require one size up, or 1.5" per foot of roof.
Also, how tall is a roof finial? Finial - 60 in. tall before the 18 in. or 24 in. skirt (skirt will add 12 in. to height on average) Has a seamless 5 in.
Also Know, what size cupola do I need for a 2 car garage?
30" base cupola on a 24' two-car garage with 10:12 roof pitch. This diagram is to help you determine the proper size cupola for your building. The normal rule of thumb is to figure 1" to 1 1/4" of cupola base for every foot of unbroken roof line.
What size cupola do I need for a 3 car garage?
The perfect size for a 3 car garage or large house. Complete your "weathervane ready" cupola with a perfectly fitted Good Directions "Standard size" Weathervane.
Related Question Answers
What is the point of a cupola?
Cupolas were originally designed to add natural light and ventilation to the area under a roof. They sit on the ridge of a roof and can be found in many shapes, including square, round, and octagonal. On barns, they're meant to allow a continuous flow of air into the hayloft, helping to dry the hay.Where do you put a cupola?
A cupola can be a decorative or functional architectural structure mounted on top of a home or barn and usually centered along the roof ridge line. In my neck of the woods all barns worthy of their salt have a functional cupola. When functional, a cupola is used to ventilate a building or roof area.How much are cupolas?
24 and 36 inch Cupolas are UPS shippable. 24 inch shipping is between $40.00 and $120.00. 36 inch shipping is between $75.00 and $175.00. 48 inch Cupolas are delivered by common carrier.What is a cupola made of?
Here they are: Shape: Cupolas are usually one of two shapes: square or octagon. Material: The highest quality cupolas are made from cellular PVC (polyvinyl chloride) vinyl, cedar wood, pine wood and/or copper. These materials tend to be maintenance-free.Do you need to ground a weathervane?
The answer to the first question is “No, weathervanes do not usually 'attract lightning' and actually less than a TV antenna does.” Typically, these antennas are grounded but not part of a lightning protection system. This is not to conduct a a lightning strike to the ground.How does a cupola work?
A cupola lets hot air out by allowing warm air to escape while bringing in cooler air. Cupolas are the small buildings that sit on top of the roof. They are designed to look like a miniature house and are available with windows or louvers, each can provide ventilation.What is a roof finial?
A finial or hip-knob is an element marking the top or end of some object, often formed to be a decorative feature. Smaller finials in materials such as metal or wood are used as a decorative ornament on the tops or ends of poles or rods such as tent-poles or curtain rods or any object such as a piece of furniture. 
