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Roof waterproofing, counter-batten and batten installation with your own hands. For roof waterproofing, I used highly vapor-permeable membrane Strotex 1300 V, which I first fastened with a stapler and then with counter-batten (40x50 mm bar). I put a sealant (foamed polyethylene tape) under the counter-batten and then fastened the batten to the counter-batten with a step of 300 mm. I used a 150x25 mm board as batten. For fastening, I used universal galvanized self-tapping screws 80x5 and 100x5 mm.