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Old 10-06-2012, 08:04 PM   #1
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waterproofing under threshold

Hi all,
We are installing a front door threshold (metal to replace old wooden one) and need to know what to put beneath it (on sill) to ensure the doorway is sealed and won't leak. (attached photos). When subfloor was removed before we retiled entry, we noticed some old water intrusion stains near/beneath sides of door. We removed old wood threshold and found a 3/4 in. gap in the sill where we cleaned out all the spider nests and put a strip of wood with weatherstriping on top. Should we simply caulk sides where jams meet sill to prevent water intrusion and caulk under/around new threshold (shown temporarily installed) or is there more we should do? We have one good weather weekend left. Thanks!
Attached Thumbnails
waterproofing under threshold-watersubflrc.jpg   waterproofing under threshold-oldthresc.jpg   waterproofing under threshold-thresstripc.jpg   waterproofing under threshold-underthresl.jpg   waterproofing under threshold-underthresh.jpg  

waterproofing under threshold-newthrestemp.jpg  


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Old 10-06-2012, 08:40 PM   #2
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About all you can do with that syle is set it in a bed of silicone caulking.

On an old house like that this style is far better and since an old house is almost never level this one can be adjusted to make up for it.

Your also going to find the seal on the top of the one you bought is going to wear out and keep coming out of the track.


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Old 10-06-2012, 09:27 PM   #3
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If you are removing and replacing the door you can make an aluminum pan out of aluminum flashing to place under the door, any water will run back out instead of rotting the ceils and such. If you need instructions how to make a ceil pan let us know.
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Old 10-07-2012, 07:37 PM   #4
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waterproofing threshold

Thanks JoeCaption and BigJim, for your suggestions. Sounds like our best option at this point is silicone caulk under new threshold, since we don't want to replace sill this summer -- cool, rainy weather coming. I had read about "vcor plus" on the "old house" site, but that comes in giant rolls. Next spring we'll be in position to replace sill and possibly door unit, but hope to get thru this year w/out water issues. The tiling in entryway worked out well (over plywood and Ditra). Thanks for tips.
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