Thread: Dimensions for a standard double door frame

Ok, from my experiance the best joints for a door frame are finger joints (like a large dovetail) and yes 820 doors are 820 wide. One thing to consider is are you getting doors which are rebated where they meet(so they overlap each other), or will a mushroom stop be the order of the day. Also allow 6mm clearance accross the frame for the doors. Mushroom stops are 15mm thick and double as a weather strip between the 2 doors.

hope that helps

Thanks Jack,

I have a few questions for you...

What is a mushroom stop? is it like a central vertical door jamb?

Also where can I get tips on the finger joints you mentioned?

If the door is 820mm wide,how high will it be? how much vertical clearance do the doors need?

Because I'm not sure what a mushroom stop is I'm leaning towards the rebated door idea. Do they come rebated? or I have to do that. What size is the rebate?

So far I have ((820 + 820) + 6) - (rebate + rebate) = internal door frame width.

Does that sound right?

Here is a typical profile of a Mushroom stop
The finger joints that were done in the factory where i once worked we done on a very expensive machine but having said that have a look here, it should give you some ideas

finger joint - Google Search

The height of the doors will depend weather or not they open in or out, typically a standard door frame of 2100 x 880 will take a 2030 x 820 door (open in) or a 2040 x 820 door (open out) the sill you use will need to be either an open in or open out sill so the doors will have to suit the sill. I know this may seem confusing but its for weather proofing. Open out doors are better for weatherproofing but that means that fly doors will need to be on the inside of the jamb and open in. Most people opt for open out and skip the flydoors. As i said this is better for weather proofing and it shows off the doors a lot more as they are not covered by flywire.

Your calculations are spot on . if you are buying new doors you can order them already rebated. The rebate is normally 15mm deep. Clearances top and bottopm should be the same about 2 to 3mm