Degradation agent

UV degradation

Lignin photodegradation causing surface greying, checking and pigment failure.

How to read this

The diagram below shows every direct connection this node has in the graph. Each line is one edge; expand a neighbour group below to read exactly why that connection exists and which standard or dataset it comes from.

Species (12)

Norway Spruce← is vulnerable to
WI-SL resistance profile: uv = 34/100 (ordinal, from EN 350 durability class, extractive chemistry and movement).
Source: WI-SL v1.2.0
Siberian Larch← moderately resists
WI-SL resistance profile: uv = 62/100 (ordinal, from EN 350 durability class, extractive chemistry and movement).
Source: WI-SL v1.2.0
Western Red Cedar← moderately resists
WI-SL resistance profile: uv = 54/100 (ordinal, from EN 350 durability class, extractive chemistry and movement).
Source: WI-SL v1.2.0
Thermally Modified Ash← moderately resists
WI-SL resistance profile: uv = 58/100 (ordinal, from EN 350 durability class, extractive chemistry and movement).
Source: WI-SL v1.2.0
European Oak← moderately resists
WI-SL resistance profile: uv = 60/100 (ordinal, from EN 350 durability class, extractive chemistry and movement).
Source: WI-SL v1.2.0
Acetylated Radiata Pine← moderately resists
WI-SL resistance profile: uv = 66/100 (ordinal, from EN 350 durability class, extractive chemistry and movement).
Source: WI-SL v1.2.0
Douglas Fir← moderately resists
WI-SL resistance profile: uv = 48/100 (ordinal, from EN 350 durability class, extractive chemistry and movement).
Source: WI-SL v1.2.0
Scots Pine (heartwood)← is vulnerable to
WI-SL resistance profile: uv = 40/100 (ordinal, from EN 350 durability class, extractive chemistry and movement).
Source: WI-SL v1.2.0
Thermally Modified Pine← moderately resists
WI-SL resistance profile: uv = 54/100 (ordinal, from EN 350 durability class, extractive chemistry and movement).
Source: WI-SL v1.2.0
Sweet Chestnut← moderately resists
WI-SL resistance profile: uv = 58/100 (ordinal, from EN 350 durability class, extractive chemistry and movement).
Source: WI-SL v1.2.0
Robinia (Black Locust)← moderately resists
WI-SL resistance profile: uv = 64/100 (ordinal, from EN 350 durability class, extractive chemistry and movement).
Source: WI-SL v1.2.0
Iroko (FSC certified)← moderately resists
WI-SL resistance profile: uv = 68/100 (ordinal, from EN 350 durability class, extractive chemistry and movement).
Source: WI-SL v1.2.0

Climate zone (3)

Riyadh, Saudi Arabia← elevates risk of
Riyadh, Saudi Arabia has a uv load of 96/100, above the 60 threshold used here to flag a dominant degradation driver.
Source: wood.ts:climates[]
Singapore← elevates risk of
Singapore has a uv load of 82/100, above the 60 threshold used here to flag a dominant degradation driver.
Source: wood.ts:climates[]
Dubai, UAE← elevates risk of
Dubai, UAE has a uv load of 94/100, above the 60 threshold used here to flag a dominant degradation driver.
Source: wood.ts:climates[]

Treatment (1)

Penetrating / semi-transparent coating← mitigates
Minimal-to-thin film coatings (EN 927-1) that erode rather than flake, favouring recoat-without-strip maintenance.
Source: en927-1

How edges in this graph are derivedWI-GRAPH v1.0.0

Species → agent edges come from the WI-SL resistance profile (0–100 ordinal scale derived from EN 350 durability class, extractive chemistry and movement). ≥70 is read as "resists well", 45–69 as "moderately resists", below 45 as "is vulnerable to".

Climate → agent edges fire when a climate's driver value (UV, humidity, salt or freeze-thaw load) is 60 or above, read directly from the climate dataset.

Treatment → agent / standard edges come from the paraphrased standards corpus used across the site (EN 927-1, EN 351-1, EN 350 clause 4, EN 13501-1).

Species → standard edges reuse the exact source list already published for each Global WoodIntel Score sub-score.

Machine-readable: GET /api/public/v1/graph?node=agent-uv · CC BY 4.0