Not compatible with IE 11

Hello, I’ve had the issue come up that this is no longer compatible with IE 11. I put in a bit of code to force it to read as IE 9 (meta http-equiv=”X-UA-Compatible” content=”IE=9″) and while it fixed some display issues (the large slider image and top menu) some issues still remain (sidebar is bumped to the bottom or the page, footer widgets are all to the left, overlapping each other.) Do you have any suggestions?