Look for bluebird houses that are nabs approved north american bluebird society.
Gilbertson pvc boxes.
Just squeeze the top opposite pins.
Certainly many thousands of birds have fledged successfully from gilberston boxes.
The gilbertson pvc nestbox is made from white 4 inch diameter pvc sewer and drain s d pipe.
Pvc will not rot split or crack nest box will host many successful broods with its great features.
Thin wall pvc vent holes cut a slot wide enough 3 32 x1 2 on each side to accept the head of a washer head sheet metal screw 19 16 hole 11 2 if 19 16 drill bit is unavailable saw kerfs on inside out side of box paint inside dark color secure bottom with 2 screws 2x2x71 2 9 71 2 screws 8 x 1 truss or washer head sheet metal.
Most sparrow resistant design available.
The walls are barely more than 1 16 inch thick and will be slightly less heat resistant than the heavier walls of schedule 40 pvc pipe.
Most blue bird birdhouses have front or side doors which offer a safe and easy way to monitor nesting birds like the gilbertson nest box.
The interior of standard gilbertson boxes is coated with non toxic paint.
Bluebirds nest within a wide range of heights from two to 50 feet.
Well designed with a premium cedar roof and recessed floor the gilbertson bluebird nest box resists moisture and meets all our specs for proper ventilation and drainage.
Bluebird house gilbertson pvc cedar bird house also can be used as chickadee house wren house or swallow bird house north american bluebird society approved made in usa bluebirds love it.
The xbox is designed to be mounted onto a half inch conduit rebar pole called the gilbertson system.
A gilbertson nestbox is made out of a pvc tube.
The gilbertson pvc nest box was recommended to us by a local bird enthusiast who had heard that house sparrows did not seem to like or nest in these very well constructed and attractive round boxes.
Now with optional poly lumber matching roof.
Steve gilbertson uses the thinner walled pvc because it is more flexible and.
Preferred by blues over the years cool birdhouse mounts quickly and easily on 1 2 inch conduit.
By backyard bird lover.
Removable body allows monitoring and maintenance.
In my experience chickadees prefer gilbertson boxes.
This attractive birch look pvc nest box is also predator resistant and lightweight.
The gilbertson nest box is approved by the north american bluebird society.
They have exceeded our every expectation and in the 8 boxes we have set up this year every one hosted at least one family of either tree swallows.
