Why is this door not recommended for internal use?

[Bill]

http://www.jewson.co.uk/windows-doors-joinery/door...

Anyone?

[otherman]

I think it's market as an external door because it's heavy duty enough. Use it indoor if you like - looks a bit utilitarian though I'd have thought.

[m4ckg]

It's probably due to the thickness being 44mm instead of the standard 34

[otherman]

You can say that again

[GuinnessMK]

It's a ledged and braced door, which means the back probably looks something like this;



And it looks like someone has had some difficulty using appropriate hinges

[Bill]

m4ckg said:

It's probably due to the thickness being 44mm instead of the standard 34

That makes sense, thanks.

Utilitarian is good, it's an old farmhouse and most of the other doors are ledged and braced.

[Bill]

Although other places sell 44mm thick doors as internal.

[Andehh]

My last place used 44mm internal doors, took a while sourcing replacements. They are just an unusual size. I preferred them over our current houses thinner ones, bigger & chunkier wins out every time!

[anonymous-user]

Andehh said:

bigger & chunkier wins out every time!

Shouldn't that be on the Match.com thread or are we not on about backdoors ?

[m4ckg]

Andehh said:

My last place used 44mm internal doors, took a while sourcing replacements. They are just an unusual size. I preferred them over our current houses thinner ones, bigger & chunkier wins out every time!

Was it a 3 storey? They were probably for doors

[Little Lofty]

It will probably be 22mm boards with 22mm braces, the one in the photo has the hinges fitted so it will fit in a standard 32mm internal casing, it's not quite right though. Unusual for the braces to be fixed as they are generally loose for handing.

[SAB888]

We always specify internal doors with a minimum thickness of 44mm, never 34mm. Ledged & braced doors aren't normally used for internal use.

[cold thursday]

Bill said:

Why is this door not recommended for internal use?

Often it is because of the moisture content of the wood. The recommended moisture content for Internal doors is 10% (+/- 2%) and for external doors it is 16% (+/- 3%). They don't recommend using an external door internaly because it might warp as it dries out.

[bogie]

cold thursday said:

Bill said:

Why is this door not recommended for internal use?

Often it is because of the moisture content of the wood. The recommended moisture content for Internal doors is 10% (+/- 2%) and for external doors it is 16% (+/- 3%). They don't recommend using an external door internaly because it might warp as it dries out.

exactly this....the DIY house renovators who did our barn originally used external doors similar to those in this thread, dunno if they got a cheap deal on a dozen of them at the time. Anyway within 12-18 months most had warped a bit, and some so bad they couldn't close anymore

The joiner mate who replaced them for me said they were external doors and had probably been stored outside for quite some time before being fitted indoors

I ended up replacing them all with engineered oak internal doors.....

[Wozy68]

bogie said:

cold thursday said:

Bill said:

Why is this door not recommended for internal use?

Often it is because of the moisture content of the wood. The recommended moisture content for Internal doors is 10% (+/- 2%) and for external doors it is 16% (+/- 3%). They don't recommend using an external door internaly because it might warp as it dries out.

exactly this....the DIY house renovators who did our barn originally used external doors similar to those in this thread, dunno if they got a cheap deal on a dozen of them at the time. Anyway within 12-18 months most had warped a bit, and some so bad they couldn't close anymore

The joiner mate who replaced them for me said they were external doors and had probably been stored outside for quite some time before being fitted indoors

I ended up replacing them all with engineered oak internal doors.....

Basically timber of the same species used for internal or external doors would come with the same percentage of moisture content from most/all timber merchants. Its more to do with which timber you should use for either external or internal use.

I would not use modern grown redwood for an external door personally, and I'd assume to use inside within a centrally heated home would also be a disaster, because it would shrink so badly.

Its a lot to do with how quickly it grows and how old the timber is before felling these days that dictates their use.

To the OP, I'd assume its because the door is 44MM thick and most internal doors and their linings are built for 35MM ones, nothing else

Edited by Wozy68 on Friday 8th May 21:44

[Andehh]

m4ckg said:

Was it a 3 storey? They were probably for doors

Nope, 2 story 1980s house semi. Brick outer wall, timber inner wall & throughout interior. With a glass panel above with an inch gap at the top for air circulation. Doors were cheap horrible brown hollow thin board types (beet way to describe them).