Westform Metals - Residential Roofing

1&2. "Z" Bar and Ridge Cap Application

1. Install panel 1 1/2 away from peak.

2. Install roof panels by lining up the eave. Any slight differences in length at the peak will be covered by the ridge. It is recommended that you also use matching tab closure to ensure that water will not be blown under the ridge cap.

3. Install Z Bar over sheets.

4. Fasten ridge to the Z Bar with the painted neoprene washer stitch screw.

3. Eave Flashing Application

1. Install the eave trim using roofing nails.

4. Gable Trim Application

5. W-Valley Flashing Application

1. Fasten valley down with roofing nails.

2. Overlap each piece of valley flashing by 6”, adding 2 rows of sealer tape in between.

6. Peak Cap Application

1. Install panel 1 1/2” away from peak.

2. Install closure.

3. Install Z Bar.

4. Install peak flashing.

7. Side Wall Application

1. Butt side edge of panel against the wall.

2. Install flashing to cover rib. Flashing goes underneath siding on wall.

8. End Wall Application

1. Install panel 1 1/2” away from wall.

2. Install closure.

3. Install Z Bar.

4. Install End Wall flashing.

ROOF PREPARATION

WESTFORM’s Prolok 12 Panel can be used in both new and old construction. We recommend prolok be installed over solid substrate, installation over strapping is possible. The following steps should be taken to prepare the roof for installation of any roof panel.

1. Make sure there are no nails or other objects that might puncture the underlayment of roof panels.

2. Check all details for possible roof penetrations which must be added to the roof prior to roof panel installation. (vented ridge – plumbing stacks).

3. Cover the roof deck with TRIFLEX-30, overlaying 6”. When installing over strapping, run the felt parallel with the metal panels, making sure that the felt is tight.

4. Snap a chalk line along the gable end where the first panel will be installed. This line should be 1/2 inch away from the edge of the roof and square with the eave.

EXISTING ROOF

In some cases metal roofing can go over existing roofing. For those roofs use 1×4 strapping on 16” O.C. screwed through to the rafter. The minimum pitch for Prolok 12 is a 2 / 12 pitch.

1. Inspect the roof for damage and make repairs.

2. Secure any warped or loose sheeting.

3. Remove all moss and debris from the roof.

4. Screw down 1×4 on 16” O.C.

PANEL INSTALLATION

Determine which flashings need to be installed prior to roof panels.
(eave flashings)
1. Align the female edge of the first panel with the chalk line along the gable end. Allow the roof panel to over hang fascia minimum 1”. The panel must be 1 1/2” down from the ridge.

2. After the roof panel is properly aligned, screw down the roof panel on the female side; fasten down the panel at the nailing flange. Now install the gable flashings.

3. Snap the second panel at the seam. Work the seam together from the eave to the ridge. Do not work the seam from the middle to each end.

4. Fasten down the panel by screwing the flange though the slots. If the slots are not located on the strapping, screw though the flange using the slots as a guide.

5. Apply panels as shown above

6. Attach large closures at the top of the panel.

7. Fasten Z bar over the closures at the top of the panel.

PROLOK RIDGE / HIP FLASHING

- Attach the roof panels 1 1/2” down from the ridge
– Check the overhang of the roof @ fascia min 1”
– Attach closures to the roof panels at ridge
– Attach z bar over closures and roof panels
– Attach the gable flashing
– Fasten the ridge cap to z bar with stitch screws

PROFILE VENTED CLOSURE

- Decking should be held back 1 1/2” from the ridge
– Attach roof panels
– Check overhang of the roof @ fascia min 1”
– Attach vented closures
– Attach gable flashing
– Fasten ridge cap

ROOF TRANSITION #1

- Attach roof panels down from transition
– That distance must be lower than the bottom of the upper roof panel
– Check overhang of the roof @ fascia min 1”
– Attach closures to the roof panels at transition
– Attach z bar over closures and roof panel
– Fasten transition with nails to roof sheeting
– Fasten transition with stitch screws to z bar
– Attach sealer tape as shown
– Attach uphill panels as shown

ROOF TRANSITION #2

GABLE TRIM

- In some cases you may have to bend edge of panel up 1”
– Place sealer tape along edge of roof panel in line with the gable flashing flange
– Install flashing by firmly pressing flashing onto sealer tape. Fasten with coloured screws
– Fasten flashing to panel with screws through the sealer tape

END WALL

- Attach roof panels 1 1/2” down from the end wall flashing
– Attach closures to the top of the panel
– Attach z bar as shown
– Nail end wall flashing to wall
– Screw flashing to z bar

SIDE WALL

PEAK FLASHING

- Attach roof panels 1” to 1 1/2” down form peak
– Attach closures to top of panel
– Attach z bar over closures
– Screw flashing to the z bar with stitch screws

EAVE FLASHING

- The eave flashing must be installed before the roof panels
– Fasten the eave flashing with roofing nails
– Roof panels must overhang fascia by 1”

DRIP CAP

- Attach flashing with roofing nails
– Drip flashing over some windows and doors may have the color on the other side

OUTSIDE CORNER

- Attach J flashing with nails
– Some corner flashings may require a J flashing for support

INSIDE CORNER

- Attach J flashing with nails
– Some corner flashings may require a J flashing for support

VALLEY FLASHING

- Starting at the eave trim, place the valley flashing so it overhangs by 1”
– Caulk and lap subsequent flashing 6”
– Place 2 rows of sealer tape parallel to the valley
– Fasten down flashing with roofing nails
– Roof panels should start 4” from the center of the valley flashing
– In heavy snow areas keep roof panels back 6” to 8” from the center of the valleys

WINDOWS

- Always start flashing from the bottom, working your way to the top. This prevents water from getting in.
– For windows, install J bottom first, making sure the flashing runs past the window
– Install the sides make sure to lap it at the bottom corners.
– Install the drip at the top of the window making sure it is long enough to cover the J trim.

DOORS

- Always start flashing from the bottom, working your way to the top. This prevents water from getting in.
– At a door way, install the drip at the bottom corner
– The J flashing sits on the drip and goes up to side of the door
– At the top of the door a drip flashing covers the door way and the J flashings