Carpeting a floor - front door catching the carpet.

[icarusbop]

Hello all

I'm looking for a bit of advice on floor coverings for a hall space, please see my attached image, it is quite a small space approx 5.2m2
The exit door in red, is UPVC in a UPVC frame, I cannot see any way to adjust the height of the door.
The floor is black bitumen?? covered concrete. With the previous covering of 10mm underlay and medium thickness carpet, the door would catch quite badly on the carpet from about 1/2 open.

I am looking for a solution to the door cathing on the carpet issue.
Because it's a concrete floor I'm keen to have underlay of some sort to help keep the heat in.

I can see two possible solutions:

Drill a couple of exporatory holes to find out how thick the bitumens is, if it is around 10mm or more, see about removing the bitumen; this would "lower" the floor by 10mm or so and felt/wool underlay would be better than the bitumen for insulation. How easy is it to get the bitumen off the concrete floor?

Have part of the floor covered with an enty way type of carpet with no or thin underlay where the door sweeps over it, and the rest of the floor with thick underlay and carpet.
The transition between the two would be the problem, from what I can find, transition strips for different heights seem to be for tiles/laminate to carpet. I've been struggling to find a transition for carpet to carpet with different heights, the only likely ones I've found are "Z" bar types - am I right in thinking the Z bar allows me to "tap" the bar down with a mallet (with it bending on Z section) so it sits on the carpet on both sides and covers both heights?

 

[foxhole]

Maybe use a cork underlay , from 2mm thick.

 

[Dereekoo]

pic of door hinges?

 

[icarusbop]

Maybe use a cork underlay , from 2mm thick.

Thanks for this - I'd never thought of cork.
I might be a good idea but everywhere I look the thermal properties of cork are listed as 0.038m2K/W which is meaningless to me.
If possible, if you know, please can you advise roughly - 4mm cork is as good at insulating as 8/10/12/15 mm foam/felt? just as a rough idea so I know what to expect?

 

[foxhole]

It is slightly more efficient than foam per mm but you can only fit what you have room for .Your carpet provides most of the insulation .

 

[icarusbop]

pic of door hinges?

I've added a pic as an attachment - thanks.

 

[Dereekoo]

I've added a pic as an attachment - thanks.

Not 100% but if you can prise off end plate you may be able to do some adjustments. My thought is if you can move the door out at the bottom and middle hinges it may swing the bottom leading edge of the door more upwards when opening and not catch the carpet. Not certain on that but perhaps worth a try before you start digging things up??

 

[icarusbop]

It is slightly more efficient than foam per mm but you can only fit what you have room for .Your carpet provides most of the insulation .

This is exactly the kind of comparison I was looking for - very helpful. Thanks very much.

 

[icarusbop]

Not 100% but if you can prise off end plate you may be able to do some adjustments. My thought is if you can move the door out at the bottom and middle hinges it may swing the bottom leading edge of the door more upwards when opening and not catch the carpet. Not certain on that but perhaps worth a try before you start digging things up??

OK thanks - I'll examine the hinges later this week when I get an opportunity and see what the options are.
I'll report back with progress (or lack thereof).