Various welding techniques are used with geomembranes to ensure strong and leak-proof seams. This includes thermal fusion welding, extrusion welding, and hot wedge welding.
Thermal fusion involves heating the geomembrane edges directly before pressing them together to form a bond. Extrusion welding uses a bead of molten material, extruded from a welding rod, to join the geomembrane sheets along their edges. Hot wedge welding employs a heated wedge to melt the geomembrane surfaces, which are then pressed together to create a seam as the wedge moves along the join.
