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elZinc Flat Lock Cladding
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elZinc Flat Lock Cladding

Flat Lock Cladding - Horizontal

elZinc Variant:
Third party certifications:
  • OMS ISO 45001

    OMS ISO 45001

    Certificate type

  • EMS ISO 14001

    EMS ISO 14001

    Certificate type

  • QMS ISO 9001

    QMS ISO 9001

    Certificate type

  • EnMS ISO 50001

    EnMS ISO 50001

    Certificate type

Traditional fully supported architectural zinc cladding system composed of interlocking zinc shingles.

Jump to:
+44 (0) 203 468 8956 www.elzinc.co.uk

Application

Wall cladding on flat and curves surfaces. Roofing - minimum pitch, consult elZinc.

Description

elZinc® flat lock is a traditional fully supported architectural zinc cladding system composed of interlocking zinc shingles. The locking joint produces a step between shingles of about 8 mm. It can be used to clad facades of almost any shape due to its flexibility as the shingles can be cut to a variety of shapes and can be curved to cover convex or concave geometries.


Zinc flat lock cladding can also be used to weather roofs pitched above 25º (consult with elZinc for your project). A wide number of basic layout formats are available to enable architectural design intent to be strengthened by the zinc cladding. The shingles are made of 0.7 or 0.8 mm thick elZinc® titanium zinc rolled according to EN 988 and ASTM B69-13.


Normal shingle widths: 430, 530, and 600 mm, nominal maximum length 2000 mm. Cladding weight (zinc only) is between 6–7 kg/m². Shingles are fixed back to sheathing/ boarding using hidden stainless steel clips secured at pre-determined centres (according to exposure) by stainless steel (A2 grade) fasteners. Sheathing/ boarding to be laid flush, true and plumb, and its fasteners driven just below the surface. For buildings that require a non-combustible substrate for the zinc, trapezoidal metal sheet panels are used as a substitute for the wooden sheathing / boarding.


Facade application:

The cladding is normally rear-vented behind the supporting sheathing/ boarding with a ventilating space of at least 38 mm. A simple breather membrane is normally installed between the zinc and the substrate to act as a separating layer. 


Roofing application:

The roof either follows a ventilated design or an unventilated (warm) roof design. If ventilated, a space of between 50–100 mm (depending on rafter length) is incorporated under the substrate, and a structural underlay (and draining membrane) is sometimes required under the zinc to ensure air circulation to its underside. Installed in an unventilated (warm) roof design, suitable methods for condensation control are required, and elZinc Protect+ must be used.


Features and benefits:

  • Naturally weathering, traditional cladding system using interlocking panels.
  • Principally used in facade cladding, on flat or curved areas.
  • Nominally weather-tight from 25º of pitch and above if used in roofing (consult with manufacturer for your project).
  • Attractive design layouts complement different architectural styles.
  • Available in three versions: Horizontal (the dominant joint runs horizontally), Vertical (the dominant joint runs vertically), or Oblique (the angle at which the dominant joint runs to be specified).

General information

Color

Grey

Light grey, medium grey or dark grey.

Red

Blue

Brown

Gold

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Finish

Coloured.

Natural

Pre-weathered

Material

Titanium zinc

Shape

Square

Rectangle

Rhombus

Length

Horizontal designs: up to 2000 mm long.

Vertical designs: up to 3000 mm long.

-

Width

Horizontal designs: 430, 530 or 600 mm wide.

Vertical designs: 430, 530 or 600 mm wide.

430 mm

530 mm

600 mm

WarrantyDescription

Lifetime

Alkimi range.

20 year

Rainbow range.

Uniclass

Ss_25_20_50_95 Zinc sheet fully supported wall-covering systemsPrimary
Ss_30_40_50_95 Zinc sheet fully supported roof covering systems

CAWS

H74/150 Zinc sheet fully supported covering to dormers

H74/5 Zinc sheet fully supported covering to dormers

H74/3 Zinc sheet fully supported roof covering

H74/110 Zinc sheet fully supported roof covering

H74/130 Zinc sheet fully supported wall covering

Specification data - Zinc sheet fully supported wall-covering systems Enhanced data

System performance

Flat lock zinc panels shall provide a weathertight wall cladding, able to freely expand and contract in response to temperature changes, and fitted to resist all loading including wind loads. The appearance of the cladding shall be one composed of flat panels, without excessive oil canning, of straight joints and neat folds, correctly set out according to the architect’s drawings and design intent.

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Insulation

Insert requirement. A zinc façade does not place any special requirement on the insulation.

-

Air and vapour control layer

Not required.

AVCL.

Insert requirement.

Carrier

Select carrier (carrier of substrate) and add any appropriate comments.

Soft wood battens.

With suitable wood preservative treatment, height 38 mm minimum or according to ventilating cavity depth. Use soft wood battens for open gap boarding, plywood or OSB sheathing.

Metal rails.

Use metal rails for metal decks, insulated metal panels.

Substrate

Select appropriate substrate, including any additional requirements. All substrates installed according to substrate manufacturer's guidelines. Other substrate systems are possible - consult zinc manufacturer for further details.

Sheathing/ boarding.

Sheathing/ boarding laid flush, true and plumb, and its fasteners driven just below the surface. For buildings that require a non-combustible substrate for the zinc, trapezoidal metal sheet panels are used as a substitute for the wooden sheathing/ boarding.

Ventilated plywood substrate, 18 mm.

Service class 2 according to EN636, and 'good one side'. Installed in a staggered layout, parallel to eaves, with a 3-5 mm gap between boards, all edges supported and fastener heads driven below surface.

Ventilated galvanized steel metal deck, 0.7 mm.

0.7 mm minimum. To give a minimum clip pull-out value of 560 N, installed 'façade side outwards' to give maximum support to the zinc trays, parallel to eaves, all ends supported.

Open gap softwood boarding according to EN 12775-2, 18 mm.

Maximum moisture content 18% and compatible with zinc and treated with zinc-compatible wood preservatives, rough sawn, 18 mm thick minimum, 80 to 125 mm wide, fixed parallel to eaves with fastener heads driven just below surface.

Foamglas insulating boards.

Installed according to manufacturer's instructions, providing a vapour-tight substrate.

Sheet underlay

-

Material

Not required.

  • Vented open gap boarding substrate.

Structural underlay.

Open fibrous mat, 8 mm (over breather membrane, sd value of 0,04 m). Edges of breather lapped and taped.

  • Unvented substrates without elZinc Protect+ backcoat - structural underlay (breather membrane + mat).

Breather membrane.

Max sd value of 0.04 m. Edges lapped and taped.

  • Vented plywood sheathing / metal deck.
  • Unvented substrates with elZinc Protect+ backcoated zinc.

Zinc sheet

Rolled according to EN988 and ASTM B69-13.

0.7 mm thick elZinc® titanium zinc.

Consider using Protect+ back coating for unvented façades. Contact manufacturer for further guidance

0.8 mm thick elZinc® titanium zinc.

Preferred for façades to keep oil canning to a minimum.

Consider using Protect+ back coating for unvented façades. Contact manufacturer for further guidance

Vertical joints

-

Form

Single lock cross welt.

Fixing standing seam joints

Fixing of flat lock shingles

Stainless steel clips.

Fixing of shingles use stainless steel clips at a nominal spacing of 300 mm along the length of the horizontal joint, and two stainless steel clips in the transverse joints.


A general spacing of 300 mm is sufficient for most projects. Clip spacing along the edges of the façade and at the corners may require reducing, and buildings located in exposed areas or over 8 m in height, or in regions exposed to tropical storms will require further study – consult our technical documentation.

Fasteners to substrate

A2 stainless steel annular ring shank clout nails, 3.35 x 25 mm.

Open gap boarding/wooden sheathing.

A2 stainless steel wood screws - countersunk head, 4.5 x 25 mm.

Open gap boarding/wooden sheathing.

A2 stainless steel pop rivet, 3.2 mm diameter.

Metal deck/insulated metal panel/ foamglass steel plates.

A2 stainless steel self-tapping screw - flat head, 4.8 x 25 mm.

Metal deck/insulated metal panel/ foamglass steel plates.

Cross joints

-

Form

Staggered cross joint.

Irregular cross joint.

Stepped cross joint.

Head detail

-

Form

Front vented with zinc wall capping.

Rear vented with zinc wall capping.

Unvented with zinc wall capping.

Bottom edge detail

-

Form

T-plate starter flashing and cavity inlet at foot.

For vented façades.

Starter T-plate.

For non-vented façades.

Execution

Joints shall set out according to architect’s drawings, or in their absence, according to the design intent of the project. The details of the zinc work should be carried out according recognized good practice and manufacturer’s recommendations. Respect minimum recommended interior radii while bending. Holes should be notched where required to prevent tears forming in the zinc. Marking out: Use a pencil, pen, crayon or chalk.


After completion, no marking should be visible. Wherever possible use a mechanical folder to bend material to give straight and uniform folds. Free edges: If visible fold over to form a 15 mm hem. Ensure the temperature of the metal does not fall below 7, or 10°C, depending on the operation, when folding, profiling or forming the metal. Follow elZinc recommendations regarding warming up zinc metal prior to forming.

Panel width

430 mm.

263 mm.

530 mm.

580 mm.

600 mm.

Panel length

Maximum recommended panel length is 2000 mm long.

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Colour/ Finish

If a backside coating is required, type 'Protect+' directly after the finish, eg. elZinc Graphite® Protect+. If an ‘Advance’ finish is required, type ‘Advance’ directly after the finish, eg. elZinc Slate Advance.

elZinc Crystal®.

elZinc Graphite®.

elZinc Lava®.

elZinc Natural.

elZinc Oliva®.

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FireRating

A1.

Co-efficient of linear thermal expansion

0.000022/ºC.

Environmental information

Contains Red List materials

No

Country of material origin

Spain

Country of product manufacture

Spain

Recyclability

100%

Fully recyclable.

Recycled content

20 %

Approximate.

Literature

Architectural solutions in zinc

Architectural solutions in zinc

Explanatory leaflet elZinc Lifetime warranty

Explanatory leaflet elZinc Lifetime warranty

elZinc - The Material - General Considerations

elZinc - The Material - General Considerations

elZinc Color Chart

elZinc Color Chart

elZinc LEED Certification

elZinc LEED Certification

Case studies

Adelaide Convention Centre
East building – Phase 2

Adelaide Convention Centre East building – Phase 2

Third party certifications

OMS ISO 45001

OMS ISO 45001

ISO45001

EMS ISO 14001

EMS ISO 14001

ISO14001

QMS ISO 9001

QMS ISO 9001

ISO 9001

EnMS ISO 50001

EnMS ISO 50001

ISO 50001

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