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How to repair wood rot and re-seal window sill?

finn2018
Community Newcomer

How to repair wood rot and re-seal window sill?

Hi Everyone, 

 

How can I go about repairing this window sill of wood rot? 

Screenshot 2024-09-23 at 11.16.10 AM.png

 

I've read through this article which was very helpful and also purchased Turbo Timer Rot Repair Kit, however, as it's inside, I would hope to use builders bog that is stainable so it can match the rest of the frame (picture 2). 
We've also bought Selley's Roof and Gutter Sealant

 

Screenshot 2024-09-23 at 11.17.04 AM.png

 

It seems like I would also need to reseal the glass at the bottom to prevent more water seeping through. How do we prep the area and what is the best method? 

 

The windows seem to have this between the glass pane and sill (from another window): 

 

Screenshot 2024-09-23 at 11.59.45 AM.pngScreenshot 2024-09-23 at 12.00.02 PM.png

(I've also checked the wood of this sill and it's hard, and seems to just be surface level water stains that are in need of re-staining) 

 

Any tips would be greatly appreciated! 

 

 

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