What is BS EN 927‑13 - Paints and varnishes about?
BS EN 927‑13 is part 13 of a European standard on paints and varnishes that covers coating materials and coating systems for exterior wood.
BS EN 927‑13 specifies a test method for assessing the resistance of a coating to impact on a defined and carefully selected wooden substrate for coatings on wood components in exterior use.
Who is BS EN 927‑13 - Paints and varnishes for?
BS EN 927‑13 on paints and varnishes is useful for: 
- Paints and varnishes manufacturers
- Coating professionals
Why should you use BS EN 927‑13 - Paints and varnishes?
During the use coated wood surfaces are exposed to various impacts. A suitable resistance of a coating on wood to impact is of importance to keep the substrate further protected with intact coating without cracks or flakes.
The simple method described in BS EN 927‑13 provides quick information if a coating on wood is capable to withstand impacts without cracks or not. A similar method exists in ISO 4211-4 for furniture surfaces in interior use but in the present document the procedure is adopted and description of a carefully selected substrate is added to enable testing of coating materials and coating systems for exterior wood.
The method should preferably be used on coatings that have not been exposed to weathering but it can also be applied after aging of the coating or under different climatic conditions to gain additional experience.
The method specified in BS EN 927‑13 is preferably used on coatings that have not been exposed to weathering. The method is suitable for use either as a means of comparing different coating systems or as a quality control test to ensure that a specified performance level is being achieved or maintained.
