door lining - allow for underlay/carpet

[diytrainee]

Hi All

When installing a new door opening and lining. How much gap do you allow for underlay and carpet?

 

[joinerjohn]

All depends if you know what sort of carpet and underlay the client is having. For all you know they could be having a thick pile carpet and superduper underlay, or could be having a cheapo rubber backed polypropylene carpet mm's thin, with newspaper underneath.
I usually allow 1/2" (12mm) then offer to come back and trim the door further if necessary.

 

[misterhelpful]

The lining usually goes right to the floor though, doesn't it?

 

[JohnD]

the answer is "nothing"

misterhelpful is correct.

you don't leave a gap under walls, either.

 

[joinerjohn]

I think the OP means how much longer than the door do you make the lining?. You wouldn't hang a door and leave no gap under the door for carpets , would you?. (I'm assuming that anyone installing a door lining, knows it goes all the way down, unless someone has planned ahead and is having engineered oak flooring)

PS, I'd like to see the builder that can build a wall that doesn't start at finished floor level, but 1/2" above it.

 

[JohnD]

you don't make the lining longer than the door, you make the door shorter than the lining.

It helps to put a hardwood threshold under the door, to reduce any change of height. I'd say 12.7mm is a good starting point if the room is going to be carpeted. Hanging the door on lift-off hinges makes it far easier and quicker to do any subsequent adjustment, which far outweighs any additional hinge cost.

 

[27neth]

you don't make the lining longer than the door, you make the door shorter than the lining.

It helps to put a hardwood threshold under the door, to reduce any change of height. I'd say 12.7mm is a good starting point if the room is going to be carpeted. Hanging the door on lift-off hinges makes it far easier and quicker to do any subsequent adjustment, which far outweighs any additional hinge cost.

You make the lining longer than the door.... You don't cut doors down if you don't need too..

John...

 

[joinerjohn]

Hear Hear 27neth. That's what I said, but Mr D doesn't listen. He's obviously a dafty diyer.

 

[27neth]

Hear Hear 27neth. That's what I said, but Mr D doesn't listen. He's obviously a dafty diyer.

You also only put a hardwood threshold under a internal door if you jump back in time to a 1970s council house...

 

[joinerjohn]

Ahh, just like my present council gaff. (and all metric sized doors)