A portable panel-frame construction kit, system and method are described. A multiplicity of elongated frame members are releasably interconnectable to form a wall frame segment having at least one aperture therethrough, wherein facing sides of the frame members are coplanar with one another and at least a pair of the frame members are disposed on opposite sides of the aperture. A gasket channel is formed at the facing side of each frame member. Each gasket channel has a respective insertion axis oriented generally parallel to its respective facing side, and may be formed by fixed engagement between a cladding element and facing side of the respective frame member. A panel member is tautly securable to the wall frame segment by initial stretching of the panel member and insertion of mounting gaskets into respective gasket channels. A pull tab may be provided to facilitate removal of the gaskets from the channels.