I'm fitting this window into this frame, the problem is I don't know how to secure it properly. The metal part that will be on the outside looks like it's suppose to have an attachment. It's screwing the wooden part to the frame strong enough to hold it? Should I just use metal flashing/ drip cap on top and silicone the sides or does it need an attachment to it?
Welcome to the Bunnings Workshop community @lucymooney. It's great to have you join us and many thanks for your question on installing a window.
Great question, and good on you for checking before installing, windows are one of those things where getting the fixing and sealing right is really important.
From what you’ve described, it sounds like the window should be mechanically fixed to the frame rather than just relying on silicone. Typically, windows are secured through the sides of the frame (either through pre-drilled holes or by screwing through the jambs) into the surrounding structure to hold them firmly in place.
The metal section you mentioned is likely part of the external flashing or trim, which helps direct water away, but it’s not usually the primary fixing method.
In general, the process would be:
A drip cap or flashing along the top is definitely a good idea to help shed water away from the opening.
Just be careful when handling the window, as glass can shatter quite easily, especially around the edges. It’s a good idea to wear appropriate PPE like gloves and eye protection, a long—sleeved shirt, trousers and enclosed footwear while installing.
It might also be worth checking with the manufacturer to see if there are any recommended fixing methods specific to that window, as designs can vary.
If you’re not completely confident with the install, it’s worth considering getting a professional to assist, as proper installation is important for both safety and weatherproofing.
Let me tag @Nailbag to see if he has any insights to share.
Please let me know if you have any questions.
Mitchell
Hi @Lucy
The reveal (window frame) should protrude through into the room side by 10mm. This will result in the frame being flush to the plasterboard when installing the architrave. This leaves 130mm protruding externally.
Assuming this window was purchased not specific for the opening depth you will need to allow the thickness of the stud wall, 90mm leaves 40mm to allow for cladding and any external window framing.
The flashing along the bottom, hangs over the cladding. You should have allowed min 15mm both sides and top of the reveal to the house frame. You then sure it into position and fix it into place with brads. Spacers/packers should be used to help keep the frame in position during this process. Thats all that is required to fix the window. Its given additional fastening by internal and external fixings.
Nailbag
