PAA SB36 - Swallow Blocking Spikes:
The PAA SB36 model has been exclusively designed by Pest-Away Australia.
The PAA SB36 is specifically for blocking swallows from perching on the rafters of your verandah or deck roof (that small gap between the underside of the roof sheeting and the rafter or joist, formed by the width of a batten).
Till now, most bird spikes are just too long to fit into this 35-40mm gap (that is because normal spikes are not designed for blocking).
The 'spikes' are more like posts, since their purpose is to block from the side.
Installation is easiest with silicone adhesive - Such as AVISIL - Since it will be difficult to screw down with so very little clearance from the Roof Sheeting. But there are pre-drilled holes in the base if you wish to screw down.