Pierced fix

Solar Mounting for IBR, Trapezoidal and Corrugated Roofs

Lumax supplies through-sheet solar mounting components for compatible IBR, trapezoidal and corrugated roofs. Choose from documented landscape short rails, portrait short rails, full-rail and tilted arrangements, with standard kits for selected layouts. Supplied to EPCs, installers and distributors.

Discuss your rooftop requirement

How it works

Mounting Through the Roof Sheet

Pierced-fix components fasten through the roof sheet using the specified screws and sealing interface. This differs from a substructure-fixed connection, where the attachment is made to the supporting steel or timber below the roof covering.

The EPC must establish the appropriate load path for the roof. Where the connection needs to engage the underlying structure, see mounting to the roof substructure for the relevant hanger-bolt and bracket routes.

How a pierced-fix short rail attachesSchematic cross-section of an IBR crest. A short rail sits on the crest on a sealing interface and is fastened through the roof sheet with the specified screws. The module sits on the rail.Short rail on the crestSealing interfaceModuleSpecified screws through the sheet
  • Module on top
  • Short rail on the crest
  • Sealing interface
  • Specified screws through the sheet
Schematic only, not to scale. Interface shape varies by roof profile.

Compare profiles

Find the Arrangement for Your Roof

Start with the roof profile and panel layout. The shape and spacing of the roof ribs, together with the module’s permitted clamping zones, determine which arrangement can be used.

Documented mounting arrangements by pierced-fix roof profile
ProfileLandscape short railPortrait short railFull railTiltStandard kitLocally made option
IBRYesCrest-mounted or side-mountedYesYesFlat-top bracketYesLow support, side-mounted or portrait short railYesLandscape and portrait kitsYesCrest-mounted and portrait short rails
CorrugatedYesCorrugated-shaped short railYesYesCorrugated flat-top bracketYesCorrugated short rail or portrait short railYesLandscape and portrait kitsYesPortrait short rail
Other trapezoidalConfirm with LumaxProfile-specificConfirm with LumaxConfirm with LumaxConfirm with LumaxNoConfirm with Lumax

AvailableNot offeredConfirm with Lumax

Roof profiles

Mounting Routes by Profile

Side-mounted short-rail brackets on an IBR roof
Side-mounted bracket on IBR

Options for IBR and Trapezoidal Profiles

IBR landscape arrangements include crest-mounted short rails and a side-mounted short rail. The 50 mm high crest-mounted short rail suits IBR 686 and similar profiles with a 35 mm crest. The taller 67 mm high crest-mounted short rail is optimised for standard IBR with a crest of 20 mm or more, and is the rail used in the IBR landscape kit. The crest-mounted short rails are for flush landscape mounting only and must never be used for tilt.

Portrait short rails suit all steel IBR and corrugated roofs for flush portrait mounting. Flat-top brackets carry full rails, usually in portrait, with landscape possible. Imported crest-mounted short rails are anodised; locally made crest-mounted short rails are tumbled or mill finish. Confirm the portrait short rail finish with Lumax.

Tilt on IBR 686 and similar profiles uses the low support (the preferred route), the portrait short rail or the side-mounted short rail, with front and rear tilt supports. The low support does not carry panels directly and can also support cable trays and walkways.

Other trapezoidal sheets can differ in crest width, rib spacing and side geometry. A component specified for IBR should not be assumed to fit every trapezoidal roof. Provide the profile details when requesting selection assistance.

  • Landscape short rails
  • Portrait short rails
  • Full rails
  • Tilt on selected short rails and supports
  • Standard kits
  • Other trapezoidal: confirm profile
Data sheets for IBR and trapezoidal roofs
Landscape solar mounting rails on corrugated roof sheeting
Corrugated short rails

Options for Corrugated Roofs

Corrugated landscape mounting uses short rails shaped for the corrugated profile. Portrait short rails and corrugated full-rail interfaces provide further options for the appropriate layout. Use the corrugated-specific connection for the chosen arrangement.

A locally made portrait short rail is available. Tilt on corrugated roofs uses the corrugated short rail or the portrait short rail, with front and rear tilt supports, in either panel orientation. Send the roof profile, orientation, layout and site location for tilt selection.

  • Landscape short rails
  • Portrait short rails
  • Full rails
  • Standard kits
  • Tilt
Data sheets for corrugated roofs

Before you specify

Rails, Sealing and Tilted Mounting on Metal Roofs

Choose Rails Around the Module Layout

How rib positions, module clamping zones and cost comparison guide the rail choice.

Landscape short rails provide local attachment points for panels positioned horizontally. Portrait short rails serve documented vertical panel arrangements. Full rails extend beneath the modules and connect through the matching roof interface.

Selection depends on how the rib positions align with the module’s permitted clamping zones. Panel size, orientation and roof geometry also affect the connection positions and how loads pass into the roof. Full rails do not remove the need to check the supporting sheet and its fixings.

Where more than one arrangement meets the requirement, compare the component quantities, installation approach and quoted material cost alongside your rail preference. Neither short rails nor full rails are automatically the best or lowest-cost choice for every roof.

Sealing and Installation Detail

EPDM interfaces, sealing washers and correct installation.

Key point: A sealing component alone does not guarantee the completed roof’s waterproofing.

EPDM interfaces and sealing washers form part of the specified installation. Correct placement and tightening matter to the seal. Follow the applicable Technical Data Sheets, fastener requirements and roof supplier’s requirements. A sealing component alone does not guarantee the completed roof’s waterproofing.

The EPC is responsible for the roof and structural-capacity assessment, module layout and installation. Module clamping zones and bonding requirements remain applicable to both short-rail and full-rail systems.

Tilted Mounting on Metal Roofs

Which short rails and supports can carry tilt on IBR and corrugated roofs.

Key point: The crest-mounted short rails must never be used for tilt.

Tilted arrangements use front and rear tilt supports on a suitable roof interface. Both panel orientations are possible.

  • IBR 686 and similar profiles: the low support (preferred), the portrait short rail or the side-mounted short rail.
  • Corrugated roofs: the corrugated short rail or the portrait short rail.
  • Full rails on flat-top brackets can be tilted, but this is uncommon because it uses more material.
  • The crest-mounted short rails are for flush landscape mounting only and must never be used for tilt.

A wind assessment is strongly recommended for tilted systems, especially at high-wind sites.

Send your details for tilt selection

Send the roof profile, orientation, layout and site location. Site location is required for tilted structures.

Standard kits

Standard Kits for IBR and Corrugated Roofs

Use the kit specified for the roof profile and module layout. Panel dimensions and permitted clamping positions must suit the arrangement. Larger or different requirements can be supplied as components against your layout or material list.

Technical information

Technical Data Sheets

Use the applicable component, system and kit Technical Data Sheets for product specifications and application information. Contact Lumax for selection assistance where the roof profile or mounting route is uncertain.

Questions

IBR and Corrugated Mounting Questions

Can portrait panels use short rails?

Yes. Portrait short rails are available for documented corrugated and IBR applications. The panel size, layout and permitted clamping positions must suit the arrangement.

Does every IBR bracket fit every trapezoidal roof?

No. Trapezoidal profiles vary. Check the actual roof geometry against the selected component’s application and dimensions.

Can I use a flush-mount short rail for tilt?

Some can. The corrugated short rail, the portrait short rail and the side-mounted short rail can carry tilt with front and rear tilt supports. The crest-mounted short rails must never be used for tilt. Send the roof profile, orientation, layout and site location for selection assistance.

When should I use substructure fixing?

Use the substructure route where the project’s required connection is to the supporting steel or timber. The EPC determines the required load path and roof suitability. Lumax can assist with the relevant component selection.

Do full rails replace waterproofing or roof checks?

No. Full rails change the module support arrangement. The roof interface still needs the specified fasteners, sealing detail and assessment of the roof’s ability to carry the installation.

Other roofs

Explore Other Roof Mounting Options

Rooftop solutionsAll rooftop mounting solutionsConcealed fixKlip-Lok and concealed-fix roof mountingSubstructure fixTiled and substructure-fixed roof mountingConcrete roofsFlat concrete roof mounting

Send Your Requirement for Selection or Quotation

  • Roof profile
  • Panel dimensions and layout
  • Module data sheet, for the permitted clamping zones
  • Quantities or your existing material list
  • Rail and bracket preferences where alternatives exist
  • Site location (required for tilt)

Site location is also helpful for general enquiries. Existing material lists can be sent directly for quotation.

Request a quotation