How do I apply a self-adhesive roofing membrane?

Always apply the self-adhesive top layer in the same direction as the underlay, staggered by 50 cm. First roll out the roofing membrane where it will be installed and position it properly. Roll it back up halfway, then carefully cut loose and remove the light grey film from the installed underlay. Now cut the film from the top layer and pull it off while rolling the roofing membrane out onto the underlay.

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