Window sill slope

Old 02-15-11, 01:58 PM
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Window sill slope

Can somebody tell me the name of the tool to use to measure the slope of the window sill. I need to know the slope so I can order new replacement windows.

Thank you
Old 02-15-11, 02:42 PM
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I have this one:

Empire Magnetic Polycast Protractor | Measuring Tapes | Northern Tool + Equipment

It is labeled as "magnetic protractor". Hope this helps. I am not pushing this dealer. It was the quickest photo I could find.
Old 02-16-11, 04:33 AM
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I don't know why you would need to know the slope since a sill angle is supplied with the window to make-up for the slope of the sill. If you measure from the top of the window to the inside and the top to the outside of the sill, the difference will give you the slope.
Old 02-16-11, 04:54 AM
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I wondered that too, Johnam! The only measurement that matters is the very interior height measurement at the top of the sloped sill. The angle of the sill has never mattered, since they make the sill expander to fit any angle. I've never seen a window sill with more than 15 degrees of slope.
Old 02-16-11, 05:21 AM
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I might know the WHY...
IIRC Anderson (for one) needs to know for their Woodwright windows, they have 3 different ways of making the bottom of the insert. MAybe other manufacturers do similar, or have multiple sill angle fillers?

Crowman...look at the bottom of page 2 here....
Old 02-16-11, 06:10 AM
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When I replaced my window sashes and jamb liners, I needed to know the slope so I could order the correct jamb liners. Seems to me the two choices I had were 7 degrees or 9 degrees. Just my 2 cents.
Old 02-20-11, 09:09 AM
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Quality Precision Innovation... since 1880 - The L.S. Starrett Company
I'm with you guys every window I order has scored lines on the back side of the sill seal and all you have to do is cut it with a razer knife.
I for one will never ever use Pella or Anderson windows. Way to high in price, poor follow up service and I've had to replace at least 100 of them in the past 15 years because of failures.

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