Tools & Resources
Install LYSAGHT FLATDEK® roofing
This page contains contains tips for the installation of LYSAGHT FLATDEK® sheeting. For more detail on general roofing installation please see Install LYSAGHT® Steel Roofing & Walling
Fasteners
| | Fixing to steel up to 0.75 mm BMT | Fixing to steel up to 3 mm BMT | Fixing to timber |
|---|---|---|---|
| Standard fixing | Self drilling, self tapping screws, with hex. washer-head & EPDM washer 10-12 x 20mm | Self drilling, self tapping screws, with hex. washer-head & EPDM washer 10-16 x 16mm | Self drilling long shank wood screws with hex. washer-head & EPDM washer |
| Higher weather-tightness | Self drilling, self tapping screws, with hex. washer-head & | Self drilling, self tapping screws, with hex. washer-head & | Self drilling long shank wood screws with hex. washer-head & EPDM washer |
When fixing to LYSAGHT FIRMLOK™, tighten until washer is just gripped enough to give a weathertight seal. Don't tighten any more.
A receiver channel is usually used to securely fix the LYSAGHT FLATDEK® roof to the main building-usually to the building fascia, but the channel can be fixed to a solid wall if there is sufficient height.
Laying LYSAGHT FLATDEK® Introduction
Laying of LYSAGHT FLATDEK® is easy. Lay sheets towards the prevailing wind. Before you join sheets, it is important to remove the protective plastic coating otherwise the sheets won't clip together properly. Be careful to place the sheets on a soft surface to prevent scratching. Some people find it easier to join two sheets together on the ground before placing them on the structure.
Laying LYSAGHT FLATDEK® Procedure
Insert the closed-cell foam strip into the receiver channel.
Push the first sheet firmly into the receiver channel, with the flat-topped rib on the edge of the roof.
- Fix the sheet at the beam end. Tighten screws until washer is just gripped enough to give a weathertight seal. Don't tighten anymore.
- Squeeze a closed-cell foam insert into the receiver channel and massage it to fit neatly all round.
- Fix the sheet at the receiver channel end.
Place the next sheet with its rib on top of the rib of the first sheet, and the house-end close to the receiver channel. Engage the ribs for the first 100 mm as shown in the image to the right.
With a rubber mallet, tap the sheet into the receiver channel ensuring the sheet beds firmly in the foam strip. Complete engaging the ribs (as in figure above). Check that the sheet fits snugly against the previous sheet by looking at the join between the sheets on the underside. Fix the sheet as previously described. Repeat the process until all sheets are laid.
Fibreglass Panels
LYSAGHT FLATDEK® can be complemented with translucent fibreglass panels. The edges of these panels overlap the adjoining LYSAGHT FLATDEK® panels. Either side of a fibreglass panel there must be at least two LYSAGHT FLATDEK® panels before another fibreglass panel may be placed. Two fibreglass panels cannot be laid next to each other. Slide fibreglass panels along the LYSAGHT FLATDEK® into the receiver channel.
Pipe Penetration
Flashing around small pipe penetrations is fairly simple using flanged sleeves or proprietary EPDM sleeves. Be careful to insulate incompatible materials.
Storage and Handling
Keep the product dry and clear of the ground. If stacked or bundled product becomes wet for extended periods, separate it, wipe it with a clean cloth and stack it to dry thoroughly.
Handle materials carefully to avoid damage; don't drag materials over rough surfaces or eachother; carry tools, don't drag them; protect from swarf.
Cutting
For cutting thin metal on site, we recommend a circular saw with a metal-cutting blade because it produces fewer damaging hot metal particles and leaves less resultant burr than does a carborundum disc.
Cut materials over the ground and not over other materials.
Sweep all metallic swarf and other debris from roof areas and gutters at the end of each day and at the completion of the installation. Failure to do so can lead to surface staining when the metal particles rust.
Sealants
Use neutral cure silicone sealants.
Adverse Conditions
If this product is to be used in marine, severe industrial, or unusually corrosive environments, Contact Us.
Metal and Timber Compatibility
Lead, copper, bare steel and green or some chemically treated timber are not compatible with this product; thus don't allow any contact of the product with those materials, nor discharge of rainwater from them onto the product. Supporting members should be coated to avoid problems with underside condensation. If there are doubts about the compatibility of other products being used, Contact Us.
