The 100 x 100mm concrete repair spur is a substantial support for a wooden fence post that has weakened, rotted or broken around ground level. At approximately 50 inches long with a 100 x 100mm section, it is the larger of the two repair-spur sizes in this range and is intended to reinforce an existing timber post rather than replace the complete fence bay.
Choose the 100mm spur where the existing post and fence arrangement call for the larger repair support. Compared with the 75 x 75mm version, the extra section and length make it a more substantial component, but the correct choice still depends on the dimensions and condition of the post being repaired rather than simply choosing the biggest option.
The spur is positioned alongside the failed timber post and secured to it after the concrete support has been fixed firmly in the ground. The aim is to transfer support away from the weakened ground-line section while leaving serviceable panels, rails and the upper part of the post in place. Check that the remaining timber is sound enough to accept fixings before treating a spur as a suitable repair.
Concrete is well suited to this repair role because the section at or below ground level will not suffer timber rot. Bolts are not included, so suitable fixings need to be selected separately; the ironmongery range may be useful when planning the hardware required for the repair. Do not rely on a small or corroded fixing to transfer the fence load into the spur.
Before digging, check for services and make sure there is enough room beside the existing post to install the spur without damaging the neighbouring panel or boundary. Where concrete or post mix is needed around the repair support, use an appropriate option from the cement products range. If several posts have failed or the fence structure is broadly deteriorated, compare replacement options in the wooden fence posts range rather than repairing each post individually.
