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• Chimney surroundings
• Roof window edging
• Roof hatch
• Vent pipe cover for seaming
• Frog mouth hatch and solar hatch
• Base plate

Chimney surroundings is carried out professionally and in the usual way as a tinsmith. Prepare the standing seam connections by bending up the PREFA roof covering (30 mm) for attaching the side paneling.

After installing the roof tile, the top panel fold is to be aligned in such a way that it is possible to hang a straight front part (Fig. 1-4).

• Cut the fold of the bead high point (Fig. 1) and lift the fold with the seaming iron (Fig. 2).
• Use the hammer to tap the bead flat (Fig. 3) so that an evenly open fold is formed. It is not necessary to cut into the panel joint. Now the front part (apron flashing) can be hooked in without any problems.

The length of the side part depend on the entire roof elements and fold allowances. At the lower end, hook in the side part in the roof tile.

In the upper area, the side part should protrude over the top panel cover.
For variant 1 - 150 mm
For variant 2 - 70 mm

• Pull the back flashing part of the edging approx. 150 mm over the top edge of the panel. Fold up the upper roof tile fold up to the next roof tile bead (Fig. 1).
• In order to increase safety against flying snow in this area, stick compriband over the entire overlapping area (Fig. 2).
• Cut the roof panel starter strip exactly to the panel bead. The front side of the roof tile starter strip must be flush with roof tile fold along its entire length (Fig. 3).

• Attach starter strip to all designated small nail holes (Fig. 4).
• Cover the roof tiles in the covering direction as on the roof surface (Fig. 5).

• Fold in the back flashing part in a traditional way and attach a 50 mm wide return fold 20 mm above the edge of the tile. Bend the return downwards. This makes it easier to work in the bead (Fig. 1, 2 and 3).
• The next row of panels is hung in the neck part and then covered.

In preparation for the front part of the frame, end plates are to be laid for rhomboid roof tiles 29 × 29 or 44 × 44. These enable a horizontal hook-on seam for rainproof integration of the edging. Fasten each end plate for rhomboid roof tiles 29 × 29 with 1 patent clip and for rhomboid roof tiles 44 × 44 with 2 patent clips.

When laying end plates for rhomboid roof tiles 29 × 29, the supplied cover strips are to be mounted above the rhomboid roof tile clip 29 × 29 (Fig. 1 and 2).

The length of the side part depend on the entire roof elements and fold allowances. At the lower end, hook in the side part in the PREFA roof covering. In the upper area, the side part should protrude over the top panel cover.

Mark the rhomboid roof tiles 29 × 29 and 44 × 44 depending on the width of the edging or depending on the required cut, add 30 mm for the lateral edging and trim the rhomboid roof tiles (Fig. 3). With each lateral upstand of the rhomboid roof tiles, the folds running diagonally downwards are to be cut out and bent up on the underside (Fig. 4-6).

The sloping patent fold is to be notched at the top in the area of the raised edge corresponding to Fig. 6.

• After cutting out the sloping folds, the rhomboid roof tiles on the side connections are raised approx. 30 mm (Fig. 7). Only a professional installation guarantees a rainproof roof.
• After preparing the rhomboid roof tiles, the side flashing can be produced and inserted into the roof covering. Fix the side part to the substructure with return clips (Fig. 8).
• The edging is now complete (Fig. 9).

Fold over the vertical folds of the side parts in the upper area (Fig. 10) and trim the back flashing part and the side parts with an allowance of 30 mm (Fig. 11). Make the fold - now starting plates for rhomboid roof tiles 29 × 29 or 44 × 44 can be mounted above the edging, and the covering of the roof surface can be continued.

Pull up shingle and DS.19 shingle until the last row of PREFA roof covering can be covered under the chimney.

• Mark the cutting and bending line depending on the width of the side part (approx. 100 mm) (Fig. 2).
• Cover the shingle or DS.19 shingle laterally next to the chimney and cut this depending on the width of the side parts (approx. 100 mm) with an allowance of 30 mm for subsequent raising of the roof covering (Fig. 3 and 4).

• Mark the upstand area and 30 mm fold allowance and cut at the fold allowance (Fig. 5).
• Make the rebate notches (Fig. 6 and 7).
• Cover notched shingle or DS.19 shingle and edge it up (Fig. 8 and 9).

Only a professional installation guarantees a rainproof roof.

Prepare the surroundings (back and side part) and fix these to the side parts of the sub-structure framework with return clips (Fig. 10 and 11).

Place the vertical folds of the side parts in the upper area and trim the back flashing part and the side parts with an allowance of 30 mm. Make the fold - now the covering of the roof surface above the surroundings can be continued (Fig. 12 and 13).

Pull up R.16 roof tile or FX.12 roof panel until the last row of PREFA roof covering can be covered under the chimney.

The length of the front part depends on the entire roof elements and fold allowances. At the lower end, hook in the front part in the PREFA roof covering.

• When connecting to the chimney, mark a 30 mm overhang for the standing seam and trim the PREFA roof covering (Fig. 1).
• Prepare the standing seam connections by bending up the PREFA roof covering (30 mm) for attaching the side paneling (Fig. 2).
• After preparing the roof covering, the side flashing can be produced and inserted into the roof covering. Fix the side part to the substructure with return clips.

Notch the upper patent fold in the area of the raised edge so that a hook fold remains, and bend the R.16 roof tile or the FX.12 roof panel upwards 30 mm at a right angle to the roof surface (Fig. 3 and 4).

For the back flashing part, the upper hook-on seam of the R.16 roof tile or FX.12 roof panel to be covered is cut at approx. 200 mm and notched. The hook-on seam is bent backwards and the side overhang is bent up 90° (Fig. 5 and 6). The back part of the surroundings to be installed.

• Close the standing seam at the side, fold it outwards at the upper end and mark the back flashing part along the course of the PREFA roof covering, trim, fold over and fasten with clips (Fig. 7 and 8).
• The following row of PREFA roof covering can then be covered over the entire width (Image 9).

For standard single windows from Velux and Roto, PREFA offers prefabricated window surrounds for quick and precise installation.

Install the roof cover until the last row below the window.

• When connecting to the window, mark and trim the 30 mm overhang (Fig. 1).
• Prepare the standing seam connections by bending up the PREFA roof covering (30 mm) for attaching the side part paneling. Set up 30 mm overhang (Fig. 2).
• The length of the front part depends on the entire roof elements and fold allowances. At the lower end, hook in the front part in the PREFA roof covering (Fig. 3).
• Open the upper panel fold of the PREFA roof covering and raise the lateral overhang by 90°. The back flashing part is then inserted (Fig. 4).

• Fold the side standing seam at the upper end of the back flashing part outwards (Fig. 5).
• Trim the back part of the roof window edging along the course of the PREFA roof covering, fold over and fasten with clips (Fig. 6 and 7).
• The following row of each roof covering can then be covered over the entire width (Fig. 8).

After installing the roof tile in the desired position in the roof window surroundings, the top plate fold is to be aligned in such a way that it is possible to hang the front part of the PREFA roof window edging.

• Cut the fold of the bead high point and lift the fold with the seaming iron (Fig. 1 and 2).
• Use the hammer to flatten the bead to allow a ccontinious seam. It is not necessary to cut into the panel joint (Fig. 3).
• Now the apron flashing can be hooked in without any problems (Fig. 4).

Notch the upper patent fold in the area of the raised edge so that a hook fold remains (Fig. 1 and 2), and bend the R.16 roof tile or the FX.12 roof panel upwards 30 mm at a right angle to the roof surface.

• For the back flashing part, the upper hook-on seam is to be cut at approx. 200 mm and notched to facilitate lateral positioning (Fig. 3).
• Open upper fold of the PREFA roof covering and set up the roof covering to the side of the marking (Fig. 4).

With each left-hand upstand of the shingle and DS.19 shingle, the folds running diagonally downwards are to be notched in order to avoid any capillary action.

• Mark the upstand area and 30 mm fold allowance and cut at the fold allowance (Fig. 1).
• Make the rebate notches (Fig. 2 and 3).
• Cover notched shingle or DS.19 shingle and edge it up (Fig. 4 and 5).

Only a professional installation guarantees a rainproof roof.

In preparation for the front part of the roof window edging, end plates are to be laid for rhomboid roof tiles 29 × 29 or 44 × 44. These enable a horizontal hook-on seam for rainproof integration of the edging.

With each lateral upstand of the rhomboid roof tiles 29 × 29 and 44 × 44, the folds running diagonally downwards are to be cut out and bent up on the underside.

• Cut rhomboid roof tile 29 × 29 or 44 × 44 at the fold allowance and make the rebate notch (Fig. 1).
• Bend open the fold and cut round (Fig. 2).
• Cover and raise notched rhomboid roof tile 29 × 29 or 44 × 44 (Fig. 3 + 4).

Only a professional installation guarantees a rainproof roof.

In order to achieve a horizontal hook-on seam for rainproof integration of the edging behind the roof hatch, end plates must be laid for rhomboid roof tiles 29 × 29 or 44 × 44.

Now starting plates for rhomboid roof tiles 29 × 29 or 44 × 44 can be mounted above the edging, and the covering of the roof surface can be continued.

In order to allow for connection to the sub-roof or separation layer, the edging of the roof hatch is not pre-assembled on the wooden frame.

Install roof covering up to the desired position of the roof hatch.
CAUTION: Observe rafter layout.

• Due to the higher stress (snow pressure) on the wooden frame, care must be taken to ensure that it is mounted with the rear wall (30 mm) lying on top (Fig. 1).
• Place wooden frame at a distance - from the front edge of the roofing fold to the front edge of the wooden frame - of 85 mm, mark and cut out the outer dimensions of the wooden frame. Open separation layer. Connect wooden frame with the wooden formwork or battens (Fig. 2).
  CAUTION: With thicker foils and formwork over 24 mm, take the finished frame height into account.

• The wooden frame is to be fixed with 4 screws. The screws in the lower area must be loosened after installing the edging in order to be able to set up the wooden frame. Then fasten the screws again (Fig. 3).
  NOTE: Glue the separation layer/sub-roof to the wooden frame in accordance with national standards. Adhesive strips are not included in delivery.
• Draw in the 30 mm cutting and bending edge for the erected roof covering (Fig. 4).

• Open the upper panel fold of the PREFA roof covering and raise the roof covering 30 mm up to the 90° mark (Fig. 5A + 5B).

• Place the roof hatch edging in the 30 mm of the raised roof covering, hang in the front part and close. For additional fastening, a return clip must be installed for each standing seam (Fig. 6).
• Fold the side standing seam at the upper end of the back flashing part outwards (Fig. 7).

• Trim the back flashing part of the roof hatch along the course of the PREFA roof covering, fold over and fasten with clips (Fig. 8).

• Position the cover on the frame and fasten with the supplied screws (6.3 × 22) in the pre-drilled holes (Fig. 9).
• With the lid closed, mark the position of the locking bracket and fasten with the screws provided (Fig. 10).

After installing the roof tile in the desired position in the roof hatch, the top plate fold is to be aligned in such a way that it is possible to hang the front part of the roof hatch.

• Cut the fold of the bead high point and lift the fold with the seaming iron (Fig. 1 and 2).
• Use the hammer to flatten the bead to allow a ccontinious seam. It is not necessary to cut into the panel joint (Fig. 3).
• Now the apron flashing can be hooked in without any problems (Fig. 4).

Notch the upper patent fold in the area of the raised edge so that a hook fold remains, and bend the R.16 roof tile or the FX.12 roof panel upwards 30 mm at a right angle to the roof surface (Fig. 1 and 2).

• For the back flashing part, the upper hook-on seam is to be cut at approx. 200 mm and notched to facilitate lateral positioning (Fig. 3).
• Open upper fold of the PREFA roof covering and set up the roof covering to the side of the marking (Fig. 4).

With each left-hand upstand of the shingle and DS.19 shingle, the folds running diagonally downwards are to be notched in order to avoid any capillary action.

• Mark the upstand area and 30 mm fold allowance and cut at the fold allowance (Fig. 1).
• Make the rebate notches (Fig. 2 and 3).
• Cover notched shingle or DS.19 shingle and edge it up (Fig. 4 and 5).

Only a professional installation guarantees a rainproof roof.

In preparation for the front part of the frame, end plates are to be laid for rhomboid roof tiles 29 × 29 or 44 × 44. These enable a horizontal hook-on seam for rainproof integration of the edging.

With each lateral upstand of the rhomboid roof tiles 29 × 29 and 44 × 44, the folds running diagonally downwards are to be cut out and bent up on the underside (Fig. 1, 2, 3 and 4).

In order to achieve a horizontal hook-on seam for rainproof integration of the edging behind the roof hatch, end plates must be laid for rhomboid roof tiles 29 × 29 or 44 × 44.

Now starting plates for rhomboid roof tiles 29 × 29 or 44 × 44 can be mounted above the edging, and the covering of the roof surface can be continued.

Base plate for rhomboid roof tile 29 × 29 (1), rhomboid roof tile 44 × 44 (2), R.16 roof tile and FX.12 roof panel (3) and DS.19 shingle (4) have the dimensions of the respective PREFA roof system and can be simply incorporated into the cover.

The base plate for roof tiles is in the form of a half plate with a conical edging socket folded in.

• Set up base plate.
• Mark the pipe diameter and cut out the formwork.
• Mark the pipe diameter on the base plate, trim the plate and then mount it (cover).
• Mount enclosed cover rosette and EPDM seal on the ventilation pipe.
• Then push the EPDM seal down over the edging so that the transition between the edging and the ventilation pipe is sealed.
• Fix the cover rosette on the pipe.

If the position of the penetration is specified and, due to this, the base plate cannot be used, pipe penetrations can be implemented using an base plate for folding in. Base plates are suitable for pipe penetrations from Ø 80–125 mm.

Depending on the roof system, the base plate extends over 1 to 2 rows and can be mounted at any point on the side.

• Raise the PREFA roof covering by 30 mm on both sides of the edging (Fig. 1).
• Put on the base plate and close the folds and return clips on both sides (Fig. 2).
• Fold both standing seams outwards at the upper end, trim along the course of the PREFA roof covering, fold over and fasten with clips (Fig. 3).

For the installation of a base plate, start and end plates must be laid with rhomboid roof tiles 29 × 29 or 44 × 44 (Fig. 1).

These enable a horizontal hook-on seam for rainproof integration of the edging plate.

As an alternative to base plate for welting in, a trim can also be folded into in a base plate and this can be covered in the roof covering. Connection to the roof covering is done with standing seams, analogous to the base plate for folding (Fig. 1 and 2).

If it is not possible to slide the base plate open due to the shape and circumstances of the penetration (e.g. satellite dish or antenna), two-piece universal vent pipe cover can be used. Integration in the roof covering is done with standing seams, analogous to the edging for folding.

In principle, continuous ventilation openings are to be preferred. If this is not possible in relation to the project, selective exhaust air openings (frog mouth hatches) can be used. They are placed in the appropriate number in the last row or covered along the ridges.

Please note that a large number of frog mouth hatches often have to be used in order to achieve the exhaust air cross-sections prescribed by the standards. Pay attention to the smooth or stucco design that matches the PREFA roof covering used. If installed on a fully boarded substrate, the boards must be cutted out sufficiently.

Air intake section of frog-mouth vent: ~ 30 cm²

Formwork and separation layer are to be cut out according to the ventilation cross-section (~10 cm in diameter). The roof covering is to be provided with a 1 cm high flare around the edges of the cut-outs.

For the installation of pipes and cables, and for penetrations up to approx. 38.5 mm. The installation of pipes and cables and/or their integration into various component layers (sub-roof, thermal insulation, airtight layer, ...) must be carried out professionally in accordance with national standards and regulations.
 

• Positioning and marking the solar roof conduit (Image 1)
• Marking the adhesive area (25 mm) and the cut-out of the pipe collar (Fig. 2)
• Cutting out (Image 3)
• Flaring (Image 4)

• Drill the hole in the middle, glue on the pipe collar and feed the protective hose through all roof layers into the interior (Image 5)
• Sand the bonding surfaces (Image 6)
• Clean the bonding surfaces and let them dry (Image 7)
• Pierce the feed-through grommet (Image 8)

• Apply special adhesive all around it (Fig. 9)
• Putting on the solar roof conduit and pressing down on it (Image 10)
• Fully installed solar roof conduit (Image 11)

A base plate can form the basis for the installation of snow rake systems, safety treads, roof safety hooks or other accessory products, e.g. if there is a rebate or crest in the area of the rafters. Do not place the respective accessory product on the fold or crest of the PREFA roof covering.

• Depending on the roofing product, the base plate extends over one or more rows of PREFA roof covering and can be mounted anywhere (Fig. 1).
• Raise the PREFA roof covering 30 mm on both sides according to the width of the base plate. If required, a return clip can be mounted for additional attachment (Fig. 2).

• Lay the base plate in the raised 30 mm of the PREFA roof covering and close the folds and return clips on both sides. Lay the lateral standing seam outwards at the upper end and fold over and fasten along the course of the PREFA roof covering with clips (Fig. 3).
• The respective accessory product can be fastened onto the base plate (Fig. 4 and 5).

After installing the roof tile in the desired position in the base plate, the top plate fold is to be aligned in such a way that it is possible to hang the base plate.

• Cut the fold of the bead high point and lift the fold with the seaming iron (Fig. 1 and 2).
• Use the hammer to flatten the bead to allow a ccontinious seam. It is not necessary to cut into the panel joint (Fig. 3).
• Now the base plate can be hooked in without any problems (Fig. 4).

Abutment details

Notch the upper patent fold in the area of the raised edge so that a hook fold remains, and bend the R.16 roof tile or the FX.12 roof panel upwards 30 mm at a right angle to the roof surface (Fig. 1 and 2).

Back flashing part

• For the back flashing part, the upper hook-on seam is to be cut at approx. 200 mm and notched to facilitate lateral positioning (Fig. 3).
• Open upper fold of the PREFA roof covering and set up the roof covering to the side of the marking (Fig. 4).

With each left-hand upstand of the shingle and DS.19 shingle, the folds running diagonally downwards are to be notched in order to avoid any capillary action.

• Mark the upstand area and 30 mm fold allowance and cut at the fold allowance (Fig. 1).
• Make the rebate notches (Fig. 2 and 3).
• Cover notched shingle or DS.19 shingle and edge it up (Fig. 4 and 5).

Only a professional installation guarantees a rainproof roof.

Apron flashing

For the installation of a base plate, start and end plates must be laid with rhomboid roof tiles 29 × 29 or 44 × 44. These enable a horizontal hook-on seam for rainproof integration of the edging (Fig. 1).

Abutment details

With each lateral upstand of the rhomboid roof tiles 29 × 29 and 44 × 44, the folds running diagonally downwards are to be cut out and bent up on the underside.

• Cut rhomboid roof tile 29 × 29 or 44 × 44 at the fold allowance and make the rebate notch (Fig. 2).
• Bend open the fold and cut round (Fig. 3).
• Cover and raise notched rhomboid roof tile 29 × 29 or 44 × 44 (Fig. 4 and 5).

Only a professional installation guarantees a rainproof roof.

Back flashing part

• In order to achieve a horizontal hook-on seam for rainproof integration above the base plate, end plates must be laid for rhomboid roof tiles 29 × 29 or 44 × 44 (Fig. 6).
• Now starting plates for rhomboid roof tiles 29 × 29 or 44 × 44 can be mounted above the frame, and the covering of the roof surface can be continued (Fig. 7).