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HAP-Rakennus OY

Nordic Bitumen

Bitumen roofing and waterproofing, done professionally.

Bitumen roofs, waterproofing and roof renovation for new build and refurbishment.

Nordic Bitumen

The roofing brand of HAP-Rakennus OY

Installation, renovation and maintenance of bitumen membrane roofs, and waterproofing of decks and terraces.

  • Bitumen roofs
  • Bitumen membranes
  • Waterproofing
  • Roof drains
  • Penetrations
  • Upstands
  • Roof renovation

01Promise

Watertightness is made in the details.

A bitumen roof is not just a surface. It is a system in which every seam, penetration and upstand decides the outcome.

  • Planned

    Site, materials and work stages are settled before installation begins.

  • Meticulous

    Seams, drains, penetrations and edges are done systematically.

  • Documented

    Progress, photographs and agreements are kept in one place.

02Quality of work

What decides the roof shows up close.

Good roofing work stands inspection from a few centimetres away.

  • A finished upstand at a rooflight, the membrane carried up the vertical face.

    Upstand

  • The junction between a brick chimney and the roof, closed with new flashing.

    Connection

  • A sealed roof penetration in the bitumen membrane, close up.

    Penetration

  • A worker bonding the membrane around a roof drain's flange with a gas torch.

    Roof drain

03Services

A bitumen roof as a system, not as separate work stages.

Freshly laid bitumen membrane on a low-pitched roof, forest behind.

Bitumen roof installation

We install bitumen membrane roofs on new buildings. We use high-quality SBS-modified bitumen membranes.

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An old roof opened up, exposing the timber structure and scaffolding.

Bitumen roof renovation

Full and partial renovation of existing bitumen roofs. We always start with a thorough condition survey.

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Tapered insulation boards laid out on a roof in a stepped pattern.

Terrace & podium waterproofing

Waterproofing of terraces, parking decks and podium structures with bitumen membranes.

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Two workers walking across a wet flat roof, checking the surface.

Maintenance & inspections

Regular condition surveys and maintenance extend the service life of the roof.

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04Photo series

The kind of work we do

4 photographs of the same object

Bitumen roofing, finished flat roof

The finished surface and its seams, photographed from four sides of one roof. Apartment blocks and a forest edge behind.

The photographs come from HAP's own picture archive and are published with its permission. Each series is one object, and the description names only the work that is visible in the frame. Object names, clients, locations, years and scope are not published until the client has confirmed them.

A finished bitumen roof: two membrane tones, collared ventilation stacks and fall protection along the edge.

05Materials

Bitumen membranes and torch-welded seams.

The work covers bitumen membranes, torch welding and seams, details and roof drains — on renovation and new-build sites, on flat roofs, upstands, penetrations and sheet-metal junctions.

A worker heating a bitumen membrane seam with a torch, the flame visible.

06How it runs

How a project runs.

  1. We look at the site
  2. We agree the work
  3. We prepare
  4. We do the work
  5. We finish and hand over

Contact

Tell us about the building and we will work out what fits.

We walk the site before quoting, so the scope is clear on both sides.

Contact