- Project plans
- Project activities
- Legislation and standards
- Industry context
- Specialist wikis
Last edited 04 Apr 2022
Differences Between PPGI And PPGL Sheets
 Basic composition and use
PPGI sheets are processed by coating with molten zinc. The zinc coating is a base metal that has protective properties making this type of sheet ideal and popular for roofing. It can also be used to produce outdoor billboards, washing machines, etc. PPGI sheets are not easily corroded and so can withstand strong sun and rain.
PPGL sheets are processed by coating with zinc, silicon, and aluminium. More precisely, the ingredients of the galvalume steel sheet have at least 55% aluminium and 43.5% zinc, with the rest being silicon and other elements. PPGL sheets can be used as roofing in addition to chimney pipes or ovens owing to their corrosion resistance, good heat resistance, and surface conductivity.
PPGI sheets that are galvanized with 100% zinc perform poorly compared to PPGL sheets when exposed to natural influences such as water. PPGL sheets may last beyond 10 years in good condition. They do not easily rust and do well when in contact with liquids that go through an oxidation process.
 Thickness and weight
Generally, PPGI sheets are lighter than PPGL sheets. The thickness however is dependent on the coating applied.
PPGL sheets possess a smoother finish in comparison with PPGI sheets which can be directly caused by the aluminum component in PPGL which PPGI sheets do not have. This makes it much easier to paint PPGL sheets without pre-treating them, although this is not advisable.
PPGI sheets cost less than PPGL sheets.
Featured articles and news
Myths and top tips.
CLC plans to ease impact of construction inflation.
BG 50 & VDI 2035 – your questions answered.
Will the way we heat homes change when winter comes ?
Can XR technology be leveraged in design & construction?
Or are you capping.
Digital gaming competition for UK students aged 16 to 18.
Heritage protection in England vs Australia.
Three-quarters of fire doors fail inspections
The role of geoparks, biospheres and world heritage sites.
Just one month to go ! Find out more here.
A new gallery for the University of Huddersfield.
What will it take to stop it ?
To celebrate world bee day 2022 !
Not forgetting part F and the new part overheating part O.
As energy prices jump up in cost.
With people in the UK from Ukraine.
Industry leader Steve Murray takes on role.
An abundant and versatile building material.
600,000 heat pump installations targeted per year by 2028.
Helping prevent those unwanted outcomes.