The History of Louvered Roofs
Home Owners Move Outdoors
Since the early 1930’s home owners started using their patios as outdoor living areas. Fabric and aluminum awning were invented which offered shade and some rain and snow protection but lacked the ability to allow natural sunlight to come into the home when needed. Many products have come to the market over the years including stationary and retractable fabric awnings as well as flat and W-pan aluminum patio covers as well as solid wood patio cover. Pergolas were also designed using wood and aluminum which allowed more light coming in the home but lacked in protection from the elements.
In the past few years insulated panel patio covers have taken a large share of the market. These were great for keeping the weather off the patio but still blocked all of the natural sun light from getting in the ever larger patio windows and doors on the home.
Finally a solution – Louvered Roofs
Louvered roofs were invented for customers to finally get the time they wanted to spend in outdoor living while completely protecting their patio. Louvered roofs were made with slats that opened and closed to provide shade, natural light, and protection from the elements as needed. The invention allowed for much more use of the patio as well as optimal protection of furniture, pets and outdoor appliances.
First Generation Louvered Roof
The first manufactured louvered roofs were invented and produced in Australia in 1984 using steel coil that was roll formed into an 8” wide center pivot louver. The strong steel allowed it to span up to 12’ without bending. It had cast aluminum ends which pivoted in a slot on an aluminum angle (the product is still in production). Different louvered roofs were invented in France, Israel, New Zealand and other countries over the next twenty years.
Coming to the USA
In the early 2000’s louvered roofs began to find their way to the USA from Australia and Israel. Then manufactures began to pop up in California, Georgia, Alberta Canada, Arizona, and Kentucky most of these manufactures used aluminum instead of steel for the louvers but the other features were basically the same.
Louvered Roofs operate in one of two ways; Center Pivot Design or Bottom Pivot Design
Currently there are 7 first generation louvered roof manufactures in the USA and Canada. 2 of them are bottom pivot and 5 are center pivot.
Center Pivot Design
The center pivot design is easiest to open and close because the louvers are balance by the pin in the middle. This allows for very little stress on the opening and closing mechanism and motor.
Most center pivot louvers are not designed to be very strong so they can only be manufactured in 9’ to 12’ length which greatly limits the size of each bay.
Louvers with the center pivot design are typically 6” or 8” wide which allows for about 80% of the natural sunlight to come onto the patio and in the home when needed.
The center pivot design comes with a full perimeter gutter to catch rain water from all sides and direct it where the customer wants it to go.
The louvers are easily connected to a pivot bar which rotates the them to open and close all at the same time.
Bottom Pivot Design
The bottom pivot design allowed for louvers up to 24’ long supported by and connected to rafters beneath every 3 to 4 feet. The louvers on this design are typically only 4” which restricts more natural light plus they can only open a little past 90° so they are unable to shade and catch light beyond that point.
The bottom pivot design makes the louvers top heavy so that when they close passed the 90° point the weight transfer creates as much as 500 lbs. of stress on the motor and mechanism.
Because rafters are needed every 3 to 4 feet the look of the bottom pivot design is less appealing. The louvers sit on top of the rafters and the rafters sit on top of the beams giving a stacked look.
The mechanism to open and close the louvers is internal in each of the rafters and hard to get to with mechanical problems. When this happens all of the louvers must be removed to gain access to the mechanism.
New Generation Louvered Roofs
The new generation louvered roofs have quite a few improvements. These are directed toward allowing the customers even more time spent on the patio as well as taking advantage of new technologies and improved strength in structure design.
There are several new generation louvered roofs now manufactured in countries across Europe including Spain, Belgium, and Italy and 3 manufactured in the USA. None of these manufactures have elected use the bottom pivot design.
New Generation Louvered Roof Improvements
Here is a list of some of the improvements these company have in their designs:
- All have the flat bottom tongue and groove louver design which is more appealing to customers.
- Some have a larger gutter to improve water flow in heavy rain storms as well as clog-prof leaf and debris screens.
- Some have ball bearings at each end of the louver to provide a low friction longer lasting mechanism.
- All have integrated the new electronics technologies with the motor and control box.
- Some have a designer gutter look for improved aesthetics.
- Some have a much stronger louvers design for improved snow and wind loads.
- Some have bearings in the pivot bar which connects all of the louvers allowing them to move together without stress.
The Sundance Louvered Roof is the only new generation louvered roof having all of these improvements to see the 14 Advantages flyer click here