Remove roofing cement.

A couple layers of roofing cement have been scraped off the roof and dormer slate. Care must be taken so as not to break any of the roofing slate when removing the tar. Often it is easier to remove very old dried out roof cement as it has started to peal away from the slate. Newer roof cement is still pliable and will smear further onto the slate surrounding the repair. Either way it is hard to get all the roof cement off the slate completely.