Frequent Insulated Roof Panel Questions

RITEK® CUSTOM ROOF PANEL - FREQUENTLY ASKED QUESTIONS

Please find listed below a summary of the most commonly asked questions about the Ritek Custom Roof Panel

What is the Ritek Custom Roof Panel?

The Ritek Custom Roof Panel is a prefabricated stressed skin composite roofing system. It incorporates BlueScope Steel Corrugated Custom Orb sheeting as the roof lining top and bottom. The sheets are bonded to layers of EPS.

How are the Panels Joined Together and Fixed in Place ?

The panels are installed similarly to the method used for normal roof sheeting. The top and bottom sheets extend in opposite directions past the edge of the polystyrene about 90mm, or two corrugations. This sheeting forms the side laps where the panels are joined together. Once the first panel is fixed in place the underside lap is sitting on the top plate ready to receive the next panel.

The next panel nestles into the lap corrugations, with the new panels top sheet, lapping back over the original panel. This is then screwed off.

The top lap is stitched and the bottom lap is pop riveted. The roof is fixed to the support structure via a long screw with cyclone assembly and rubber seal. The screw passes straight through the panel and fixes to the support structure below ( timber or steel ).

What is the Minimum Roof Pitch ?

The recommended minimum roof pitch is 5 degrees, as detailed by BlueScope Steel for Colorbond Corrugated Roof Sheeting.

Economically Designing with the Ritek Custom Roof Panel ?

To economically use the panel it is ideal to minimise the wastage. This is achieved by making the roof width a multiple of the panel width ( each panel has an effective cover of 755 mm ). If this isn't an option, the exact roof width can be achieved by cutting a panel onsite.

How do you Finish the Eaves ?

There is no finishing work required to the eaves. The underside of the Ritek Custom Roof Panel is a pre-finished surface and as such does not require any framing, lining or painting.

How Far Can the Ritek Custom Roof Panel Span ?

The Ritek Custom Roof Panel can span (unsupported) up to 8.0M. Refer to our span tables for further information on spans. Span tables are available in the Technical Section.

Can the Underside Sheet be Flat ?

Our span tables and all associated engineering is based upon Corrugated Custom Orb Roof Sheeting top and bottom. Consequently it is the only type of sheeting we offer with the panel.

What material type can be used?

Colorbond XRW, Ultra, Zincalume, Stain Steel and Aluminium can all be used in the manufacture of the Ritek Custom Roof Panel.

What Colours can we Use ?

You can use zincalume or any colour in the BlueScope Steel Colorbond range for the underside or ceiling sheet.

The colours recommended for the top sheet include Zincalume, Surfmist, Headland, Jasper, Sandbank, Classic Cream, Paperbark, Dune, Shale Grey, Pale Eucalypt, Wilderness, and Blue Ridge.

If you require advise on a colour not listed here please contact us.

What is your Lead Time ?

We generally ask for a Lead Time of 4 weeks from order. Should you require materials quicker then this then contact us and we shall examine our manufacturing schedule. We have found that we can meet most reasonable requests.

What Provision is there in the Ritek Custom Panel for Higher Wind Categories ?

Generally, higher wind loads reduce the span. Please refer to the Technical Information.

Can you fix Ceiling fans, Lights and Solar Hot Water Systems to the Ritek Custom Panel ?

Yes. There is a service core provided where the panels join for services to be included. The conduits can then be bought through the sheeting of the panel where required, with the fitting being fixed to the roof panel. Generally domestic solar hot water systems can be installed on to the Custom Roof Panel, ideally these should be located over supporting walls or beams.

How much does the Ritek Custom Panel Weigh ?

The weight of the 100mm panel is approximately 10kg / m 2 .

How far can the Ritek Custom Panel Cantilever ?

In its length, the roof can cantilever up to half the back span (subject to design). For example if the roof is spanning four metres it can cantilever two metres. In its width, the roof can cantilever a maximum of 300 mm. We recommend that where possible the supporting member should continue out to the end of the panels.

How do you Finish the Wall to Roof Joint, How do you Fill the Openings Created by the Corrugations ?

When the panels are placed on the top plate, there is a gap created in the corrugations of the roof sheeting. This gap is filled by a foam jointing material which we supply with the roof system. It is fixed to the top plate prior to installation.

Is There any Preparation Required for the Support Structure ?

Ideally the roof panel will need to finish flush with the support beam. The angle of the top of the supporting beams / top plate will need to be parallel to the roof pitch. This means that if the support structure is a timber top plate, it will need to be packed with a raking packer or the top plate cut to the pitch of the roof.

What Flashings are Required for the Ritek Custom Roof Panel ?

Almost all of the flashings used with the Ritek Custom Roof Panel are standard roof flashings. The only flashings specific to the roof system are the Z-fascia and the barge cap. Although they are specific to the system they can be provided by any roof flashing manufacturer.

Can You Curve the Ritek Custom Roof Panel ?

One of the greatest benefits of the Ritek Custom Roof Panel is the ability to achieve single curves and multiple curves. We have a number of standard radii which include 8, 10, 12, 14, 16, 18, 20, 25 & 30 metres in which the Custom Panel can be manufactured to.

Steel screw details?

When fixing into steel members, the screws supplied have the capability to self drill into steel up to a thickness of 6mm.