A permit will not be required for ordinary repair work, incidental to the upkeep of a building or structure; provided, that there is not contemplated or involved any change in the classification or any increase in the fire hazard thereof; nor the removal of any beam or support; nor the renewal of any external or division wall or portion thereof; nor the installing, closing or changing of any stairs, exits, scuttles, skylights or fire escapes, nor changing the number, location or connections of the fixtures, traps, vents, waste, soil or drain pipes of the plumbing system; nor changing the number, location or connections of the lighting system; nor re-shingling or recovering of roofs or the renewing of the exterior woodwork of any frame building, structure or portion thereof, inside the fire district.