The UK roofing market differs significantly from the USA.
Key differences:
Metric dimensions (mm, not inches)
Trapezoidal “box profile” dominance
Strong agricultural and industrial demand
BS EN standards compliance
U-value and insulation requirements
Understanding UK roofing profile standards is critical for:
Machine manufacturers
Coil exporters
Panel producers
Building specifiers
The UK market is dominated by:
Box profile is the most common for industrial and agricultural buildings.
The naming system in the UK:
32/1000 means:
32 mm rib height
1000 mm effective cover width
Typical features:
5 rib trapezoidal design
200 mm rib pitch
Side lap with anti-capillary groove
Common thickness:
0.5 mm
0.7 mm
0.9 mm
Used for:
✔ Agricultural buildings
✔ Industrial sheds
✔ Warehouses
✔ Garages
Very similar to 32/1000.
Rib height:
34 mm instead of 32 mm.
Used where slightly improved water flow or strength required.
Lower rib height:
19 mm.
More common for:
✔ Wall cladding
✔ Light roofing
✔ Internal applications
Less structural capacity than 32 mm profile.
Traditional UK corrugated:
“3-inch corrugated”
Pitch approx:
76 mm (3")
Depth approx:
18 mm
Typical effective cover:
990–1000 mm (varies)
Common in:
✔ Agricultural buildings
✔ Heritage renovations
✔ Residential outbuildings
Used primarily for:
✔ Architectural projects
✔ Residential extensions
✔ High-end commercial
Common seam heights:
25 mm
32 mm
38 mm
Panel widths:
400 mm
500 mm
600 mm
Often aluminum or prepainted steel.
UK market heavily uses:
Factory-made insulated sandwich panels.
Characteristics:
Steel outer sheets
PIR or mineral wool core
Integrated trapezoidal profile
These reduce on-site labor and improve U-values.
Common thickness (BMT):
| Thickness | Typical Use |
|---|---|
| 0.5 mm | Light agricultural |
| 0.7 mm | Industrial roofing |
| 0.9 mm | Heavy duty / long span |
UK does not commonly use US-style gauge references.
Always specify mm.
UK follows European standards:
EN 10346
Common grades:
S250GD
S320GD
S350GD
S450GD
S550GD
S350GD widely used for box profile roofing.
Most common coatings:
Z275 (galvanized)
AZ150 (Al-Zn / Galvalume equivalent)
Prepainted steel common for visible roofing.
Corrosion classification per:
BS EN ISO 12944
Environment categories C1–C5.
UK buildings must comply with:
Eurocodes (EN 1991)
Wind loading can be significant in:
Coastal areas
Scotland
High-exposure rural sites
Fastener spacing and profile thickness selected accordingly.
Unlike USA:
UK profiles are fully metric.
Common effective covers:
1000 mm
990 mm
1060 mm
Machine design must reflect metric standardization.
Roll forming machines targeting UK should support:
✔ 1000 mm effective cover profiles
✔ 0.5–0.9 mm thickness range
✔ S350GD forming
✔ Z275 and AZ150 coatings
✔ Anti-capillary side lap detail
Developed width for 1000 mm cover box profile often:
~1200–1250 mm coil width.
Large part of UK metal roofing demand comes from:
Farms
Livestock buildings
Storage sheds
Durability and cost balance important.
Box profile dominates this segment.
❌ Supplying US 36” cover panels
❌ Using gauge instead of mm
❌ Not matching S350GD standard
❌ Ignoring Z275 minimum requirement
❌ Not providing CE marking documentation
UK market requires compliance documentation.
UK requires:
✔ CE / UKCA marking
✔ Declaration of Performance (DoP)
✔ EN 1090 compliance (structural applications)
Material documentation must align with EN standards.
Most common UK roofing profiles:
✔ 32/1000 box profile
✔ 34/1000 box profile
✔ 19/1000 wall cladding
✔ Corrugated 3"
✔ Standing seam 400–600 mm pan
Typical material:
✔ 0.5–0.9 mm
✔ S350GD
✔ Z275 or AZ150
UK market is:
Metric-based
Eurocode-driven
Box profile dominant
32/1000 box profile.
Yes, very common for trapezoidal roofing.
S350GD under EN 10346.
Z275 galvanized or AZ150 Al-Zn.
No. Geometry and dimensions differ significantly.
No, thickness is specified in millimeters.
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