Replacement of half of the mosquito net
If the frame of the mosquito net is divided by a central strip, and only half of the net was destroyed, you don't have to replace the whole thing, as long as you have a similar material. In this case, you will not be able to stretch the mesh by bending the frame.
So you need to cut a longer piece. Start by attaching the mesh to the center strip, and then put her second, longer end between two wooden slats (should be of the same thickness as the frame, so that the material does not hang or bend upwards). Nail the wood to the countertop. Take two wedges and drive them between the edge of the frame, and stretch the mesh on the slats.
Replacement of half of the mosquito net
1 Remove the profiled slats and cut out the damaged mesh fragment, without prejudice to the second half, nailed to the central strip.
2 Nail the mesh to the center strip and unfold it. Insert its end between two woods and nail it to the countertop, right at the edge of the frame.
3 Drive between the slats and the edge of the wedge frame, to stretch the material. Nail the mesh to the frame and finish the same, like a regular frame.