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How to repair window frame next to shower?

Hi all,

We recently moved into a house and noticed an issue with the window frame next to the shower. The bottom of the frame has some broken pieces, which we suspect is due to previous improper sealing around the shower. After a closer look, we didn’t find any visible water damage outside the shower, and we also tested the surrounding wood [Identified during building inspection as a minor issue], which seems solid with no signs of rot.

I cleared out the broken pieces of the frame, and upon inspection, there doesn’t appear to be any internal rot either. Based on my research here, I’ve seen some posts suggesting using Earl's 250ml Wood Hardener and Turbo 175ml Builders Bog Flexipack to repair the damage.

Before I go down that path, I wanted to check if anyone has alternative recommendations or steps I should consider. Is this the right approach, or should I be looking at a different method to fix this damage properly? Any tips on preventing similar issues in the future ( re-silicon the shower)?
proximity to the showerclose-up

Thanks in advance for your help!

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EricL

Hello @SouthFieldSnoop

Welcome to the Bunnings Workshop community. It's sensational to have you join us, and thanks for sharing your question about fixing the damage to your window frame.

Your research has paid off. I was going to recommend those two exact products to fix the damage on your window frame. The only time I would suggest cutting and replacing the wood is when more than 50 percent of the timber has rotted away. In this instance the damage is still manageable, and builders bog can still be applied.

My best advice is to use Crommelin 1L Flat Aquablock Waterproof Primer Undercoat - 1L to protect that damaged section of your frame and applying silicone on the edges of the frame.

If you need further assistance, please let us know.

Eric

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EricL

Hello @SouthFieldSnoop

Welcome to the Bunnings Workshop community. It's sensational to have you join us, and thanks for sharing your question about fixing the damage to your window frame.

My best advice is to use Crommelin 1L Flat Aquablock Waterproof Primer Undercoat - 1L to protect that damaged section of your frame and applying silicone on the edges of the frame.

If you need further assistance, please let us know.

Eric

SouthFieldSnoop

Thanks, Eric – That was really helpful!

Just a couple more details for clarity:

The hole seems to be about 2 inches in depth and 1 cm in width. It goes all the way back to the frame of the shower screen (you can see the silver frame after clearing out the broken pieces, as shown in the picture). Given the size of the hole, do you think the small pack of the product would be sufficient?
Also, I noticed the primer comes in a 1L container. Would it be possible to get a smaller size, as 1L seems like it would be too much for this job?

Appreciate any further advice!

EricL

Hi @SouthFieldSnoop

If you are worried about not having enough bog for the outside surface, I suggest filling the cavity part way with Parfix 340g Expanding Foam Filler. Just keep in mind not to over fill otherwise there will be no space for the bog. In regards to the paint size, I believe 1 litre is the smallest can available.

If you need further assistance, please let us know.

Eric

SouthFieldSnoop

Hi @EricL ,

Thank you so much for your advice! I managed to get everything done over the weekend. I didn’t use Foam Filler since the Bog was sufficient. I applied two coats of primer, let it dry, and then painted over it. I also replaced the silicone around the edges.

However, during the rain yesterday, I noticed that the water wasn’t coming from the shower, as I had suspected earlier. Instead, it was seeping in through the aluminum joints on both top corners. It seems the screws and rubber seals weren’t tight enough to keep the water out. For now, I’ve applied some clear silicone to the bends and will keep monitoring the situation.

EricL

Hello @SouthFieldSnoop

That repair job looks mint! Could not even see that it was damaged before. I totally agree with your plan, just keep an eye out for errant leaks if the silicone does not work or if there is another source of water coming out.

If you need further assistance, please let us know.

Eric

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