What size door do I need

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  #1  
Old 08-24-17, 06:34 AM
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What size door do I need

I am replacing a garage to home entry door. I've done a lot around the house, but I'm having a slight issue figuring out exactly what size door I need here. It's 32x80 but the depth is what I'm struggling with. It's a 2x6 wall so I thought I needed a 6 9/16" jamb but take a look at the pictures. The side seems right but when I measure the sill it looks close to 5 1/2" without that extension. So what do I have here? A 5 1/2" jamb with extensions and a sill extension?

Thanks
 
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  #2  
Old 08-24-17, 07:03 AM
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You are going to buy a 32x80. The reason why you can't match the depth is simple. Whenever the question is why, the answer is money. Manufacturers decided to save money so they cut an inch off the side. When you install it, align it with the inside & rip some pine to replace the missing inch.
 
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Old 08-24-17, 07:37 AM
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Yes, get a 32x80, 6 9/16" door. (These are a stock item at many stores since it is a standard size) The adjustable threshold that it comes with should be correct... it will likely be a 5 3/4" sill with an additional 1 3/8" or 2" sill nose extender.

If / when the wall thickness is not quite right (likely due to 5/8" sheetrock on one side) you can add a thin jamb extension onto one side or the other. When the difference is minor you usually want to flush up the door with the exterior side, and add (what I imagine will be) 5/32" x 3/4" pine screen moulding to the interior side. Step it back 3/16" from the inside edge of the door, and step the inside edge of your casing back another 3/16" from that.
 
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Old 08-24-17, 08:15 AM
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Thanks for the replies. Do most doors come with an adjustable threshold? This is the door I was looking at:

JELD-WEN 32 in. x 80 in. 6-Panel Primed 20 Minute Fire Rated Steel Prehung Right-Hand Inswing Front Door-THDJW166100236 - The Home Depot
 
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Old 08-24-17, 08:46 AM
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Generally they do, because almost no one wants a door that DOESN'T have an adjustable threshold... but you would need to check. Some box store doors dont have the adjustment... because it probably shaves a few $$$ off the price. I would just call the store, ask for the Millwork dept, and ask.
 
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Old 08-24-17, 09:34 AM
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Is the sill on a 6 9/16" door measure at 6 9/16" as well?
 
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Old 08-24-17, 09:49 AM
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No, it is usually 7 5/8" - 7 3/4". You support the bottom of the sill nose that protrudes beyond the sheathing with an apron that is generally 1" thick. (Trim)

The front edge of the sill nose is usually flush with the front of the brickmould.
 
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