Re: Concrete vs Wood Exposure
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I second Mac's autographed and dated sketch. The bigger and more conductive your drip edge to carry the water "OUT/AWAY" , the better your chances of not worrying about it. Any wooden products are gonna swell in the presence of moisture, which will eventually lead to ruin once they start making contact and rubbing/sticking.
For bonus protection, use a brush or sweep seal at the farthest?extent? of the drip edge (sweeping the floor)that will conduct water down to the concrete but through the magic of water surface tension, won't seep past and under the door.
For bonus bonus, use multiple brush or sweep seals for added draft/insect/water resilience and redundancy in case of damage.
And you can always mount a bulb seal from the door down rather than a threshold facing up.
These resources?are terrific for engineered concepts and pricing is not usually too bad either.?
On Wed, May 5, 2021 at 5:51 PM Airtight: Clamps by Air Compression < airtightclamps@...> wrote: I attach a drip to door to move water away.
 Designing and building for 50 years ?So for this storage room door, I prefer the threshold is not too high. I can do what I did for my shop. The threshold is on the interior and the back side of the door touches it. Threshold acts like a stop and has weatherstrip in it. So the bottom of the door is exposed to concrete. I wanted low threshold for moving equipment in and out and this has worked fine for 16+ yrs.
The difference in this shed¡¯s case is that while water sheds away from my shop door, right now the rain water does flow over the concrete pad in front of the door. This can be remedied by better grading to some extent but is a result of maximizing the height of door opening to be able to accommodate a 12¡¯ high clearance. So for a worst case scenario assume that after rain the water may pool on the low side corner of the door opening.
So if I place the threshold behind the door, I expect that the concrete will be wet for some time after it rains, at least under the left corner. If I extend the wood threshold under the door, let¡¯s say 3/4¡± thick, it will push water away but will likely absorb moisture in the process. Do you guys think having wood threshold under the door will be worthwhile?
Imran
-- Brett Wissel Saint Louis Restoration 1831 S Kingshighway Blvd (at Shaw Blvd) St Louis, MO 63110 314.772.2167 brett@...
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