Here is one of the tactics I use in my Bhs to enhance fast nests growth especially in new swiftlet farm. I will show you step by step to DiY this corner boar netting.It is very effective. Swiftlets would even build nests on corner boards that have tweeters. When you see the result you would agree that techniques, skill and knowledge are the pillar of success in Swiftlet farming.
Nest marking on the Corner board netting without tweeter.
I prefer to use plastic netting because it withstands oxidation unlike steel or aluminium which could oxidise and produce toxic.