

UPVC
|
Aluminium
|
Wood
|
|
Does it pit, peel, corrode or warp?
|
Never
|
Yes
|
Yes
|
Will it remain structurally strong?
|
Yes
|
Yes
|
Yes
|
Does heat or cold transmit through material?
|
No
|
Yes
|
Only if kept dry
|
Will it require painting or other maintenance?
|
Never
|
Yes
|
Yes
|
Will scratches show as a different colour under the paint?
|
No
|
Yes
|
Yes
|
Does cleaning make material look new again?
|
Yes
|
No
|
No
|
Is it safe against termites?
|
Yes
|
Yes
|
No
|

