Abstract: A nailer device for securing abutting edges of a first and second construction panel to a support timber or top plate includes a planar member which in use of the device is disposed contiguously relative to the first panel and between the first panel and the top plate. A further planar member is rigidly secured to the planar member and is disposed perpendicularly relative thereto such that the planar and further planar members define therebetween an elongate recess for the reception therein of the top plate so that the device is supported by the top plate. The planar members also define therebetween a further elongate recess which is disposed on an opposite side of the planar member relative to the top plate such that the abutting edges of the panels are located within the further elongate recess with the second panel disposed contiguously relative to the further planar member. Also, a fastener fastens the device to the top plate.