Home > Companies > Ark Profiles Ltd > ArkZip 50 (Steel)

Steel standing seam profile, 50 mm deep.

Features and benefits:

  • The mechanical seaming process forms a weathertight, sealant-free standing seam.
  • To be produced on-site at ground or eaves level.
  • Can be combined with other products from the Ark Profiles range, including ArkLiner or ArkDeck (specified separately) to form twin-skin constructions.
  • Also available in an aluminium variant.
  • Fasteners will be fixed to one position within the sheet length.
  • CE marked, and manufactured in accordance with BS EN 14782, BS EN 508-2: 2000 and BS 5427: 1996.


Can be applied to the ridge or crown of a roof.

See manufacturer's literature for key installation requirements.

Standard product features


  • Profile: Steel.
  • Brackets: Grade 1.4301 (304) stainless steel with an isolating ethylene propylene diene monomer rubber (EPDM) seal.


50 mm.


0.65 mm.

Technical characteristics:

  • Non-fragility rating (to ACR[M]001: 2014): Class B.
  • Fire performance (to EN 14782:06:5.1.2): Reaction to fire: HPS200 Ultra®: C-S2,d0; LG: C-S3,d0; external fire performance: Class B-roof (t1), Class B-roof (t2) Class B-roof (t3) and Class B-roof (t4).

Consult manufacturer for further details.


Colour/ Finish:

- Tata Colorcoat® LG:

Life expectancy (inland): 15–25 years; life expectancy (coastal): 10–20 years.

- Tata Colorcoat HPS200 Ultra®:

Life expectancy (inland): 30–40 years; life expectancy (coastal): 25–30 years.

Primary fasteners:

A2 stainless steel. End distances 100–300 mm (sheet end to halter centre line).

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-65-52/400 Steel profiled sheet

NBS Specification

NBS Buliding logo
This product is associated with the following NBS clauses:

Product specification

An important note about specifying



Ark Profiles Ltd


+44 (0)1332 504002

Product reference

[ArkZip 50/429 (steel)]
Width: 429 mm.
[ArkZip 50/459 (steel)]
Width: 459 mm.


[Curved - crimp curve to 1 m minimum radius]
[Curved - natural curve to 60 m radius]
[Curved - smooth curve to 19 m radius]


[ ______ ]

Colour/ Finish

[Tata Colorcoat® LG]
Consult Tata standard range and insert requirement.
[Tata Colorcoat HPS200 Ultra®]
Consult Tata standard range and insert requirement.

Primary fasteners

140 x 5.5 mm

Manufacturer details

Unit 5 & 6 ,
Heritage Business Centre,
Derby Rd,
Derbyshire, DE56 1SW
Tel +44 (0)1332 504002
NBS Plus
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