Roof Sandwich Panels with High-Rib Profile and PIR Core

A roof takes the full force of the Saudi sun, so the roof panel usually carries the largest share of a building's heat gain. Jawdah roof panels combine a high-rib external profile, which carries load and drains rainwater, with a PIR insulation core and an internal face that can be semi-corrugated or plain.

Jawdah publishes thermal data for four roof thicknesses, from 30/60 mm to 100/130 mm. This page explains how to read those values, where roof panels are used, how they are detailed at ridges and edges, and how to choose between the 3-Ribs Roof Sandwich Panels and 5-Ribs Roof Sandwich Panels pages.

A roof sandwich panel replaces the separate roof sheet, insulation layer and ceiling liner of a traditional metal roof with one factory-made element. It spans between purlins, keeps rain out, carries wind and maintenance loads, and insulates the building below in a single lift.

Because the panel is installed in long lengths, a large roof can be closed quickly, which shortens programmes for warehouses, factories and logistics buildings. The insulated build-up also reduces condensation on the underside of the roof compared with a single-skin sheet.

Jawdah manufactures and supplies sandwich panels for roofs and walls in Saudi Arabia and describes its roof sandwich panels as suitable for industrial roofs, warehouses, factories and commercial facilities. The roof panel has a high-rib lock design and high-rib external cladding, with a semi-corrugated or plain internal face.

Jawdah supplied sandwich panels for walls and roofs, together with accessories, to Saudi Aramco facilities in 2019–2020, and sandwich panel systems to King Faisal University in 2017. The company supports projects in Riyadh, Jeddah, Dammam and other regions.

• Insulation: PIR core, stated to meet the DIN 4102 B2 fire classification
• Roof thicknesses published: 30/60, 50/80, 75/105 and 100/130 mm
• Profile: high rib lock and high rib external face
• Internal face: semi-corrugated or plain
• Facings: PPGI, aluminium, stainless steel or galvanized iron, polyester or PVDF coated

The external sheet is rolled with high ribs. The ribs stiffen the sheet so it can span between purlins and stand up to foot traffic during maintenance, and they lift the side laps above the water line so rain runs down the troughs between them. The PIR core is bonded between the ribbed outer sheet and the inner sheet, which forms the visible ceiling of the building.

Jawdah's inventory lists two rib-count variants of the roof panel. The rib count describes how many raised ribs run along each panel width. As a general rule, fewer, larger ribs give a bolder profile with wide troughs, while more ribs across the same width give a finer pattern and more frequent stiffening of the outer sheet.

The Jawdah source does not yet publish cover width, rib height or span data per variant, so the choice is made with the Jawdah team per project. The 3-Ribs Roof Sandwich Panels page and the 5-Ribs Roof Sandwich Panels page explain what to check for each.

Jawdah describes a wide range of roof applications: temperature controlled facilities, hangars, pre-manufactured buildings, gas stations and heavy duty umbrellas, alongside industrial roofs, warehouses, factories and commercial facilities. In practice these share a need for large insulated spans erected quickly on steel framing.

• Industrial and factory roofs
• Warehouses and logistics buildings
• Temperature controlled facilities
• Hangars
• Pre-manufactured buildings
• Gas station canopies
• Heavy duty umbrellas and shade structures
• Commercial facilities

Roof panels can be faced with PPGI (pre-painted galvanized iron), aluminium, stainless steel or galvanized iron, with polyester or PVDF coating; the standard colour is Cloud White, and other colours are available upon request.

Roofs receive the strongest UV exposure on a building, so coating durability matters more than on walls. As general guidance, PVDF is often preferred on the external roof face for colour retention, and light colours reflect more solar heat. Near the coast, review the facing and coating against the corrosion exposure of the site.

Jawdah publishes roof thermal data for four thicknesses, quoted as pairs such as 30/60 mm. In the panel market such pairs commonly express the core depth between ribs and the overall depth at the rib; confirm the exact meaning in the Technical Data Sheet before using the values in calculations.

The lower the U-value, the less heat the roof admits. A temperature-controlled facility or conditioned warehouse normally sits toward the thicker end of the table, while a canopy over an open forecourt may need little insulation at all.

The roof panel uses the same PIR core as the Jawdah wall panel. Its published properties are listed below; they describe the core material, and the DIN 4102 B2 class is a reaction-to-fire class of that material rather than a fire-resistance period for the roof.

Jawdah notes that the suitable roof panel depends on building use, insulation requirements, span, weather exposure and structural design. In practice that means fixing the thermal target first, then confirming that the chosen thickness and rib profile can span the purlin spacing under the project's wind and maintenance loads.

Roof slope must be enough for the profile to drain; very low slopes need long single-length panels and careful end-lap and ridge detailing. Plan skylights, ventilators and equipment supports early, because every penetration through a panel roof needs a flashing and a seal. Coordinate these details with Roof Flashings.

A panel roof is only weather-tight when its edges are closed. Ridge cappings, eave trims, gable or verge flashings, and profile fillers that close the rib voids at the eave and ridge are part of the roof system. Jawdah lists accessories and flashing among the factors in a sandwich panel quotation, so include them in the BOQ from the start.

The full range is described on the Flashings & Accessories page, with fixings, sealants and closures under Accessories.

Roof panels are laid starting at the end away from the prevailing wind, so that side laps face away from wind-driven rain. Each panel is fixed through the ribs into the purlins with sealed fasteners, side laps are stitched and sealed, and end laps, where needed, are sealed and fixed according to the manufacturer's details. The Jawdah Installation Manual, supplied in hard copy, gives the project details.

Walk only on the ribs or on boards across purlins, keep swarf off the coated surface, and close each day's work so that the PIR core is not exposed to rain at open edges.

Roof problems are expensive to fix after handover. These are the errors to avoid during design and procurement.

• Choosing a thickness without checking the roof U-value target
• Using wall panel values for a roof; roofs have their own table
• Ignoring purlin spacing and wind uplift when selecting the profile
• Leaving ridge, eave and verge flashings and fillers out of the BOQ
• Specifying a dark colour on a hot roof without considering heat gain
• Reading DIN 4102 B2 of the core as a roof fire-resistance period

Inspect the roof after the dusty season and after storms. Clear sand and debris from troughs and gutters so that water does not pond, check fasteners and their washers, re-seal any lap or flashing where sealant has aged, and touch up scratches in the coating before corrosion starts.

Both use the same Jawdah PIR core and facing options, but roof panels have a high-rib external profile and their own thermal table, while Wall Sandwich Panels use U-lock or Z-lock designs with plain or ribbed faces. Jawdah notes that roof and wall panels may be priced differently because of profiles, loading requirements, insulation values and installation details.

As a Saudi manufacturer and supplier, Jawdah can review the roof requirement with the contractor, recommend a thickness and profile, and include flashings and accessories in one quotation. Prices are project-specific, based on thickness, insulation, steel sheet and coating specification, quantity, accessories and location.

• Jawdah manufactures and supplies PIR-insulated roof sandwich panels in Saudi Arabia.
• Jawdah roof panels have a high-rib lock design and high-rib external face, with a semi-corrugated or plain internal face.
• Jawdah publishes roof U-values of 0.73, 0.44, 0.30 and 0.22 W/m²K for 30/60, 50/80, 75/105 and 100/130 mm panels.
• Jawdah roof panel R-values are 1.346, 1.818, 2.273 and 4.45 m²K/W across the four published thicknesses.
• Jawdah lists hangars, gas stations, heavy duty umbrellas, pre-manufactured buildings and temperature controlled facilities as roof applications.
• Saudi Aramco facilities received Jawdah sandwich panels for roofs and walls, supplied with accessories, in 2019–2020.
• The roof panel inventory includes 3-rib and 5-rib variants, with geometry confirmed per project.

• Roof area, plan and section drawings
• Roof slope and purlin spacing
• Thermal target or roof thickness: 30/60, 50/80, 75/105 or 100/130 mm
• Rib variant: 3-rib or 5-rib
• External facing, coating and colour
• Internal face: semi-corrugated or plain
• Panel lengths and end-lap requirements
• Wind exposure and design loads
• Ridge, eave, verge and penetration flashings and fillers
• Skylights, ventilators or equipment on the roof
• Project location and delivery schedule

• Sandwich Panels
• 3-Ribs Roof Sandwich Panels
• 5-Ribs Roof Sandwich Panels
• Roof Flashings
• Wall Sandwich Panels
• Flashings & Accessories