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Gap at bottom of double door3/30
We have been fabricating entry doors for quite sometime and over the years we have tried to direct customers away from double doors due to how they seal at the threshold.
We usually make our doors 2-1/4" thick. This thickness usually causes the door to stick over the adjustable threshold that we use due to the thresholds being made for a 1-3/4" door. Standard door bottoms (sweeps) are also made for 1-3/4" thick doors. We have used corner pads to bridge the gap between the active door and the T-astragal but always feel that this is a band-aid.
Looking for advice of how other door builders try to eliminate this gap through different construction methods or supplied parts (thresholds, door bottoms, etc.
Does anyone try to do something different to the T-astragal to bridge the gap?
Do any European designed doors address this issue?
We use a Pemko door shoe (234APK) which is dadoed into the bottom of the door a 1/4" in from the inside of the door. This sits on top of raised saddle (about a 1/2").Then we put a kerf in vinyl seal between the Pemko and the outside of the door. This can extend a bit beyond the edge of the door on the strike edge and brush the felt pad.
This is the best we have been able to do. Only made more complicated by three point locks in both doors.
This is gray area for us. Always has been. We ship corner pads and several the bit of adhesive backed felt, foam, and more with every double door set. No real instructions, just "use as needed to close the gap". We typically use extension bolts and a bronze interlock on the wood sill/door bottom. The use of multipoints complicates things a bit.
I don't like shifting it off to the installer, but then they should have to think occasionally, eh? I keep these things in the truck so if I visit later, I can spot a gap and close it up and be a hero, but I wish there were a definitive solution.
I think conservation technologies has a product that we had used in the past. It's a sweep with weather seal that expands laterally with the mechanical action of the door closing against the threshold. I'm not sure if they still make that product, or even if I am remembering correctly it's exact function, but their products are high quality. It's been a few years since I have done a double entry door.
Conservation Technology Weatherseal