He kakahu muka karāhe taumaha ake te muka karāhe whatu, he nui ake te muka i ahu mai i ōna miro tonu. Nā tēnei āhuatanga ka tino kaha te whatu, ā, ka whakamahia pinepinetia hei whakanui i te matotoru o ngā papa whakarewa.
Heoi, he taratara ake te kakano o te whatu haereere, ā, he uaua ki te piri pai i tētahi atu paparanga o te haereere, o te kakahu rānei ki te mata. Ko te tikanga, me whakamahi he papanga angiangi ake mō ngā mahi whatu haereere hei ārai i te tā. Hei whakakapi, ko te tikanga, ka paparuatia, ka tuia hoki te haereere ki te whāriki miro tapatapahi, ka penapena i te wā i roto i ngā whakatakoto paparanga maha, ā, ka taea te whakamahi i te ranunga miro haereere/tapatapa mō te hanga i ngā mata nui, i ngā taonga rānei.
1. Matotoru ōrite, taurite te taumahatanga, kāore he huruhuru, kāore he paru
2. Tere te makuku i roto i ngā kapia, he iti te ngaronga o te kaha i raro i te āhua makuku
3. Hototahi ki te maha-rētina, pērā i te UP/VE/EP
4. Ngā muka kua whakarārangihia kiato, ka hua ake he pumau āhua teitei me te kaha hua teitei
4. Ngāwari te urutau āhua, Ngāwari te whakakī, ā, he mārama pai
5. He pai te ātete ki te takai, he pai te hanga me te whai hua o te utu
| Waehere Hua | Taumaha Wāhanga (g/m2) | Whānui (mm) | Roa (m) |
| EWR200-1000 | 200±16 | 1000± 10 | 100±4 |
| EWR300-1000 | 300 ± 24 | 1000±10 | 100±4 |
| EWR400 – 1000 | 400 ± 32 | 1000± 10 | 100±4 |
| EWR500 – 1000 | 500 ± 40 | 1000± 10 | 100±4 |
| EWR600 – 1000 | 600± 48 | 1000± 10 | 100±4 |
| EWR800-1000 | 800± 64 | 1000± 10 | 100±4 |
| EWR570-1000 | 570±46 | 1000± 10 | 100±4 |