Finish flat roofs, slightly sloping roofs and dormer windows with bitumen, Elastofol, zinc or copper? VITD ensures that your roofs are reliable roofs without leaks. Inspections, maintenance, renovation and new roofs are the field of work of VITD. Depending on the situation, roofs can be provided with traditional bitumen or Elastofol. With this material, the seams are thermally welded with a hair dryer so that there is no risk of fire.