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Old 11-23-2009, 08:17 PM   #1
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Best Way Repair This Window Sill ?


I just bought this house and this is just one of the many things need to be repaired.

Looking for advice on how to repair this window sill

Who ever tried to fix it cemented in such a way that when it rains the water runs in
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Last edited by markee; 11-23-2009 at 08:19 PM.
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Old 11-24-2009, 05:43 AM   #2
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Best Way Repair This Window Sill ?


Your problem could be solved by simply adding the missing stool inside the window or by adding a piece of window stop to the inside to act as a dam. You might try to reslope the outside as well to help flow the water away from the sash. The sash also appears to be lacking any weather stripping along the bottom.
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Last edited by wrangler; 11-24-2009 at 07:12 PM.
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Old 11-24-2009, 03:42 PM   #3
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Best Way Repair This Window Sill ?


Tough to tell from the picture but you could always make a sill out of Azek and caulk it up right. Would definitely with stand the weather and can be painted.
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Old 11-24-2009, 05:19 PM   #4
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Best Way Repair This Window Sill ?


I would cut out the defective repair and reform it with a smooth slope away from the window. Also put some sealant under the frame.
Ideally the cill should overhang the wall with a drip on the bottom as shown here.
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Old 11-24-2009, 09:50 PM   #5
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Best Way Repair This Window Sill ?


Great reply's thanks

What do you think I should use to cut off the defective cement repair and what product should i use to recreate the outer cill ?


Thanks again

Last edited by markee; 11-24-2009 at 09:52 PM.
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Old 11-25-2009, 04:09 AM   #6
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Best Way Repair This Window Sill ?


Use a hammer and chisel to cut the render away. To form a new slope use 2 coats of washed plastering sand and portland cement.
Take the slope under the frame and then use a flexible sealer. If you take the sand/cement against the frame a small crack could form between the frame and render. allowing water in.
When actually forming a proper cill insitu we make up some formwork and use concrete with re bar, or a purpose made stone one.
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Old 11-25-2009, 07:33 PM   #7
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Best Way Repair This Window Sill ?


WOW! "stuart45" is in England, "markee" is in Florida, and "stuart45" give the answer I would give and use. Yes, "markee" I agree that the existing, actually non-existing, window sill should be removed and completely reshaped. I also agree that you should remove enough old material so that when you start "coming back up" you should be forming under the existing window so as to prevent any cracks and likely future leaks. When you do form the new sill, add the overhand as suggested also. IF this is not within your DIY capabilites, please call in someone who knows how to do this. After all, it's only your new home and you would want it to last a long time without any future leaks. Good Luck, David
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Old 11-25-2009, 07:50 PM   #8
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Best Way Repair This Window Sill ?


I am going to venture a guess that the window is not flashed on the bottom, or for that matter on the sides. As long as you are going to remove the sill, you should install proper flashing, ideally on all sides of the window, assuming there is none. Note the flashing detail on some of the previously posted drawings. In my experience, improper or non-existent window flashing is common, and over time leads to leaks and damage to the window framing.
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Old 11-28-2009, 10:13 AM   #9
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Best Way Repair This Window Sill ?


You can get "composite" (plastic) sill, nosing, and brick mold at HD or Lowes around here. That's what I would use once you get the old mess prepped. It won't rot and has the appropriate slope to channel the water away from the window.
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Old 11-28-2009, 10:31 AM   #10
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Best Way Repair This Window Sill ?


Quote:
Originally Posted by bjbatlanta View Post
You can get "composite" (plastic) sill, nosing, and brick mold at HD or Lowes around here. That's what I would use once you get the old mess prepped. It won't rot and has the appropriate slope to channel the water away from the window.
That's possibly the best solution, depending on what look you want to achieve, and whether you need to match in with the rest of the house.
Other methods include a brick or tiled cill as shown below.
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Old 11-28-2009, 11:51 AM   #11
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Best Way Repair This Window Sill ?


None of the windows in this house have any sills with any real over hangs there just cement with stucco like you see in the pics the bottoms look exactly like the sides just angled the same way plus adding any over hang will get in the way of the hurricane shutters

So I'm just simply looking to recreate what was there before is all match the rest of the house



Quote:
Originally Posted by stuart45 View Post
That's possibly the best solution, depending on what look you want to achieve, and whether you need to match in with the rest of the house.
Other methods include a brick or tiled cill as shown below.
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Old 10-10-2012, 05:40 PM   #12
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Best Way Repair This Window Sill ?


I would cut out the defective repair and reform it with a smooth slope away from the window. Also put some sealant under the frame.
Ideally the cill should overhang the wall with a drip on the bottom as shown here.

Stuart 45, There is something I don't understand about the detail you posted. Where does the flashing go? Does it turn up behind the sill? if so, does the anchor pierce it? if not, what is the purpose of the flashing?

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