Flashings & Accessories for Sandwich Panel Systems

A panel envelope is only as good as its edges. The panels themselves are factory-made and consistent, but the places where they stop, turn a corner, meet a window, reach the ground or cross the ridge are closed on site with formed metal flashings and small components. That is where most leaks, dust ingress, thermal bridges and untidy finishes start.

Jawdah lists accessories and flashing among the factors that shape a sandwich panel quotation, and it supplied wall and roof panels with accessories to Saudi Aramco facilities in 2019–2020. Item lists and dimensions for individual flashings and accessories are not yet published, so they are confirmed per project.

Flashings do three jobs at once: they shed water away from joints, they cover cut panel edges so the insulation core is protected, and they give the building its finished lines. Accessories make the system hold together: fasteners carry wind loads, sealants close laps, and profile fillers stop wind, dust, birds and insects entering through rib voids.

Leaving these items vague in the BOQ is one of the most common reasons why panel projects run over budget. A clear schedule at tender stage avoids site improvisation and mismatched colours.

The Jawdah sandwich panel price guidance names accessories, flashing, transportation and installation requirements as one of the factors that determine the quotation. Its published project reference for Saudi Aramco facilities (2019–2020) records sandwich panels for walls and roofs supplied with accessories.

No item-by-item list, profile drawing, girth or thickness is published for flashings or accessories. The Jawdah team confirms the components and their details against each project's drawings.

The range is organised in three groups so each one can be specified clearly. Wall Flashings close external and internal corners, window and door openings, the wall base and the parapet top. Roof Flashings cover ridges, eaves, gables or verges, valleys and roof penetrations. Accessories include fasteners, sealants, tapes and profile fillers.

• Wall flashings: corners, openings, base, parapet
• Roof flashings: ridge, eave, gable or verge, valley, penetrations
• Accessories: fasteners, sealants, closures and fillers

As general practice, flashings are folded from coated sheet of the same material family and colour as the panel face they meet, so that they weather alike and look continuous. Jawdah panels use PPGI, aluminium, stainless steel or galvanized iron facings with polyester or PVDF coating and a standard Cloud White colour; state the matching requirement in the RFQ and confirm the flashing material with Jawdah.

Avoid mixing dissimilar metals in contact without separation, particularly on coastal sites, and use fasteners whose corrosion resistance matches the exposure.

Draw every edge condition at large scale before ordering: base, corners, each window and door type, parapet, ridge, eave, verge and every roof penetration. For each detail decide which flashing overlaps which, so water is always shed outward and downward, and where sealant or a filler is needed behind it.

Coordinate flashing colours with the panel colours on the elevations, and keep the number of different flashing shapes small by standardising openings where the architecture allows.

Base trims and lower flashings go on before the first wall panel; corner and opening flashings follow as the walls rise; roof fillers and eave trims are placed before roof panels, and ridge cappings close the roof last. Follow the Jawdah Installation Manual, available in hard copy, for the panel side of each detail, and seal laps in the flashings themselves as well as against the panels.

These omissions appear in many panel tenders and are easy to correct early.

• Writing flashings as a lump sum without a schedule of shapes
• Fillers that do not match the panel rib profile
• Flashing colour not matched to the panel colour
• Missing base trim, leaving the panel core exposed at ground level
• Fasteners or sealants unsuitable for coastal exposure

Ordering flashings and accessories with the Wall Sandwich Panels and Roof Sandwich Panels keeps colours, profiles and delivery in one package. Send the edge details with the panel RFQ so the Jawdah team can confirm the components and include them in the quotation.

• Jawdah lists accessories and flashing among the factors that determine a sandwich panel quotation.
• The Jawdah wall and roof panels delivered to Saudi Aramco facilities in 2019–2020 were supplied with accessories.
• The Jawdah Flashings & Accessories range is grouped into wall flashings, roof flashings and accessories.
• Jawdah does not publish item lists or dimensions for individual flashings; they are confirmed per project.
• Flashings close sandwich panel edges at corners, openings, bases, ridges, eaves and verges.
• Profile fillers close the rib voids of profiled panels at eaves, ridges and wall heads.

• Edge detail drawings for walls and roof
• Schedule of flashing types with running lengths
• Flashing material, coating and colour per panel colour
• Fillers matching the wall and roof panel profiles
• Fastener type and corrosion exposure of the site
• Sealants and tapes required
• Roof penetrations and skylights to be flashed
• Delivery together with panels or separately

• Wall Flashings
• Roof Flashings
• Accessories
• Wall Sandwich Panels
• Roof Sandwich Panels
• Sandwich Panels