Our brand new Invisible Swift Box is manufactured to UK Brick Size Specifications.
This nest box as the name suggests it suitable for the Swift. Swifts see our buildings as substitute “rockeries” where they would breed in a natural habitat.
The population of these birds has declined since the 1970s and all three species are now on the Amber List of Birds of Conservation Concern. Property maintenance and renovation often denies access to these birds, so providing a specially designed nest box is a practical way of helping the species and may be a condition of planning consent.
Cavity nesting birds are also known to use Swift boxes as nesting sites.
This nest box is made of the durable material WoodStone®, a mixture of wood fibre and concrete. The nest box is completely bricked in. At the front the nest box is finished with brick slips, all of them have to be created a 6 cm wide and 3 cm high entrance aperture.
This Swift building block can be used for new construction or renovation. It is designed to be built into a wall, where you have a narrow cavity. The block sits half way across the front wall leaving 120mm approximately hanging into the cavity. It is essential to give the back of the block some support. Assuming you have a cavity, which is 150mm plus then add insulation behind particularly if you have a warm space behind.
The insulation in the cavity can simply continue behind the block, so there is no thermal bridge. If insulation has to be cut away with a 100mm cavity, it is important to cut the insulation around the circumference of the block.
Preferably install the built in block in the gable end on the north or east side of the building 3 courses down from the top. This gives an ideal height for the block and is an area where there will be little disturbance from humans. Keep the flight path of the nesting box clear so do not allow trees or shrubs to grow in front of the wall. Swifts likes to breed in colonies, therefore it is advisable to build in several building blocks together. The distance between the mounting the blocks must then be at least 40 centimetres. No nesting material needs to be added. The recommendation is that you should place a minimum of 1 block per new dwelling so on a 30-house development you would have 30 blocks on the site.
Swifts use little nest material and do not make dirty marks on the façade.