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Double-hung vs. casement sill design and water intrusion question

Oaktown
10 years ago

Window gurus, there currently is a discussion going on in the building forum on the pros and cons of double-hung windows and casements. Below I've included a link to that discussion.

Towards the end of the thread (August 5 etnries) the posts mention a difference in sill design and the possibility of water intrusion with casements, most of which apparently are designed with a flat sill rather than the sloped sill found with double-hungs. There was a concern expressed about casements that are installed without a sloping sub-sill. (At least this is how I am reading it, please let me know if I am wrong.)

If any of you would care to weigh in, I think your opinions would be much appreciated. I know that I want to be sure our contractor gets it right when our casement windows are installed! Thanks for any thoughts.

Here is a link that might be useful: Window discussion on building forum

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