Flashings & Accessories · Roofs
Roof Flashings for Sandwich Panel Roofs
Roof Flashings are the formed metal cappings and trims that close a sandwich panel roof at the ridge, eaves, gables or verges, valleys, wall abutments and penetrations, keeping rain and dust out of the rib voids and panel edges.
- Item data
- Confirmed per project
01 / Overview
Quick answer
Roof flashings are formed metal pieces that seal the edges and junctions of a sandwich panel roof: ridge cappings, eave trims, gable or verge flashings, valley gutters, wall abutment flashings and penetration flashings. Together with profile fillers they stop rain, wind and dust entering the rib voids. For Jawdah high-rib roof panels, flashing shapes are confirmed per project.
Overview
Why roofs need more flashing care than walls
On a panel roof, water moves down the troughs of the high-rib profile toward the eave. Wherever that flow is interrupted, at the ridge, at a valley, against a wall or around a vent, a flashing has to take over and lead the water safely past the edge. Wind pressure on roofs is also higher at edges and corners, so roof flashings must be fixed as carefully as the panels.
Jawdah lists roof flashings within its Flashings & Accessories range and includes flashing in its panel quotations. Shapes and sizes are not published and are confirmed per project; this page explains each roof flashing and the information Jawdah needs.
Roofs face rain from above, ponding risk on low slopes and the strongest wind suction at edges and ridges. A wall flashing mostly sheds water running down a vertical face; a roof flashing must keep out water that can be driven sideways and uphill by wind, and it sits where uplift forces peak.
That is why roof flashings combine three elements: a capping or trim shaped to the edge, a filler that seals the rib voids beneath it, and fasteners spaced for the higher edge loads.
Types
Roof flashing types and where they go
The positions below are found on most panel roofs. Their exact shapes depend on the high-rib profile and on whether the 3-rib or 5-rib variant is used, so Jawdah confirms them per project.
| Flashing | Where | What it does |
|---|---|---|
| Ridge capping | Roof apex | Closes the top of both roof slopes |
| Eave trim | Lower roof edge | Delivers water into the gutter and closes panel ends |
| Gable or verge flashing | Sloping side edges | Covers the last rib and the panel edge |
| Valley gutter | Internal roof junction | Collects water from two slopes |
| Wall abutment flashing | Roof meeting a higher wall | Laps under the wall and over the roof |
| Penetration flashing | Vents, ducts, skylights | Seals around openings in the panel |
How it works
Fillers and laps: how a roof edge stays sealed
Under a ridge capping or over an eave, the ribs of the panel leave open voids. Profile fillers shaped to the rib close those voids, and the capping sits on the fillers with sealant between. At the eave the panel overhangs into the gutter so water drips clear; at the ridge the capping laps over both slopes, and on low slopes the panel ends are often turned up to stop water blowing back under the capping.
02 / Performance
Specifying roof flashings for Jawdah roof panels
Start from the roof plan: mark ridges, eaves, verges, valleys, wall abutments and every penetration, with lengths. Then state the rib variant, 3-Ribs Roof Sandwich Panels or 5-Ribs Roof Sandwich Panels, since fillers and some cappings must follow the rib shape.
Give slope and wind exposure so fixings at edges can be detailed, and state colour and material to match the roof face. Jawdah roof panels are faced with PPGI, aluminium, stainless steel or galvanized iron with polyester or PVDF coating.
Maintenance
Inspecting roof flashings
Check ridge cappings, verges and penetration flashings after strong wind and after the dusty season. Look for lifted edges, loose fasteners, aged sealant at laps and sand built up in valleys, and correct them before the rainy months.
03 / Applications
Installing roof flashings
Place eave fillers and trims before laying the roof panels, fit valley gutters before the adjoining slopes, and close ridges and verges after the panels are fixed. Lap each flashing length in the direction of water flow, seal laps, and fix at the closer spacing that roof edges need. Plan penetration flashings before panels are cut, using the Jawdah Installation Manual, available in hard copy, for the panel side of the detail.
Selection pitfalls
Roof flashing errors that cause leaks
Roof leaks on panel buildings are most often found at edges and penetrations rather than in the panel field.
- Missing or wrongly shaped fillers under ridge cappings
- Laps running against the direction of water flow
- Penetrations cut on site without a planned flashing
- Edge fixings at the same spacing as the panel field
- Valleys too small for the catchment of two slopes
04 / Technical
Closer look
Detailed product imagery is being prepared.
In preparation
Key facts
- Roof Flashings are part of the Jawdah Flashings & Accessories range for sandwich panel roofs.
- Roof flashings seal ridges, eaves, gables or verges, valleys, wall abutments and penetrations.
- Jawdah confirms roof flashing shapes and sizes per project; they are not published.
- Profile fillers under roof flashings close the rib voids of high-rib roof panels.
- Fillers and rib-following trims must match the 3-rib or 5-rib roof profile used.
RFQ / BOQ checklist
- Roof plan with ridges, eaves, verges and valleys marked
- Running length per flashing type
- Rib variant: 3-rib or 5-rib
- Roof slope and wind exposure
- Penetrations, skylights and equipment
- Flashing material and colour matched to roof panels
- Profile fillers for eaves and ridges
05 / Resources
Further chapters in preparation
Technical resources
Technical documentation is being prepared for this product.
Projects using this product
Project references are being prepared.
Compatible systems
System relationships for this product are being prepared.
Our technical team can share the current information on request.Ask the technical team
06 / FAQ
Frequently asked questions
Typically ridge cappings, eave trims, gable or verge flashings, valley gutters where slopes meet, wall abutment flashings and flashings around each penetration.
No. The Jawdah team confirms shapes, girths and thicknesses for each project against the roof plan and the chosen rib variant.
Shaped closures that fill the rib voids at eaves and ridges so wind, rain, dust and birds cannot pass under the flashing.
Flat cappings may be similar, but fillers and any rib-following trims must match the rib profile, so state the variant in the RFQ.
Wind suction is highest at roof edges, corners and ridges, so flashings and panels there are normally fixed at closer spacing set by the engineer.
Send the roof plan with flashing lengths, rib variant, slope, colour and penetrations together with the roof panel RFQ.
Next step
Quote roof flashings with your roof panels
Send the roof plan, rib variant and penetrations. The Jawdah team will confirm the roof flashings and fillers and include them in the quotation.