May pros and cons naman yung dalawa... Accdg sa mga natatanhngan ko...
Pvc-- it can control noise inside and outside compared to analok.
-- pero may nagsabi na since pvc sya, parang nat as durable in terms of years sa analok. Tingin ko dito more on how you use and maintain it.
-- mas mahal compared to pvc.
-- mas mabigat feeling pag hinahawakan dan analok na parang lighter.
Analok- always get te good quality. Tama check if its really aluminum or may halo. Alam ko parang may kapal din yan. Its an option if u want it to be painted white to look like the pvc white.
Sa experience ko, sa mga napupuntahan ko and sa mga house ng family and relatives, ang roller parati ang problem. Yung isa naman, ang napansin ko pumapasok water. So better kung merong recommendation ng kakilala yung supplier and installer.
Also ask what kinds of sealant ang gamit. Kasi yung iba tinitipid.
Mas mura compared to pvc