External blinds work before heat enters the home. That’s their advantage. In western Sydney areas like Blacktown and Wentworthville, where sun exposure is stronger, external aluminium Venetian blinds help reduce internal temperatures naturally. These aluminium outdoor window blinds sit outside the glass and adjust to changing light. Louvres angle to block harsh sun while still allowi... https://imswindowfurnishings.com.au/external-aluminium-venetian-blinds/