How to Install External Architraves & Window Head Flashing (Step by Step)

If you’ve ever struggled to get your cladding to finish neatly against windows, this step-by-step guide to installing external architraves will show you exactly how it’s done. In this video, I cover everything from measuring and cutting, to fitting the window head flashing, to sealing and finishing for a sharp, professional result. I also share my favourite architrave cutting trick that saves time and eliminates the need to chase short points on mitres.

Whether you’re working with James Hardie Linea weatherboards or another type of cladding, the same principles apply. By the end, you’ll know how to get clean lines, tight joints, and a durable weather-sealed finish around aluminium windows. Watch through to see the full process of fitting external architraves and learn a few pro builder tips you can use on your next project.

Music
DeKobe - Small Problems

TIME CODE
0:00 - Intro
0:59 - Cutting architrave trick
3:39 - Pre drill and paint mitres of architraves
4:46 - Architrave details, cladding and window head flashing explanation
5:37 - Timber architrave installation
6:20 - Weather board and architrave installation detail
7:15 - Finishing details of filling, sanding and sika flex.
7.24 - Painting and conclusion

▼ ▽ LINKS & RESOURCES

Website
https://greysand.com.au

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Disclaimer:
These videos are intended to provide information and inspiration only. If you choose to imitate, duplicate or copy anything you may have observed in these videos, you do so at your own risk. Greysand does not take any responsibility for any action taken as a result of the information or advice on this YouTube channel and shall not have any liability in respect of any injury or damage that may result. To view full disclaimer, click here: https://greysand.com.au/disclaimer/