Sheet rock mud on hardboard

Posted by AndyS on January 31, 2009, 8:31 pm

Andy writes:

I have a room done in 4 X 8 sheets of hardboard, 1/4" thick, from
Home Depot. The "rough" side is the room side. The "rough" side
has a grain on it about like screen wire. The "slick" side is shiny.

Has anyone tried to use joint compound on the "rough" side of
hardboard to coat or texture it ?

I am concerned if the compound will "stick" as well as to drywall,
and
whether I should wet the hardboard before applying it ?

Thanks for any informed opinions on this...

Andy in Eureka, Texas

Posted by Steve Barker TB on January 31, 2009, 10:16 pm

AndyS wrote:

> Andy writes:
>
> I have a room done in 4 X 8 sheets of hardboard, 1/4" thick, from
> Home Depot. The "rough" side is the room side. The "rough" side
> has a grain on it about like screen wire. The "slick" side is shiny.
>
> Has anyone tried to use joint compound on the "rough" side of
> hardboard to coat or texture it ?
>
> I am concerned if the compound will "stick" as well as to drywall,
> and
> whether I should wet the hardboard before applying it ?
>
> Thanks for any informed opinions on this...
>
> Andy in Eureka, Texas

Informed opinion? Yes, you could skim coat it, BUT:

#1. but since it's 1/4" thick, it'll flex if someone touches it the mud
will fall off.

#2. If you have sheetrock behind it, disregard #1.

#3. If you don't have sheetrock behind it, you are in violation of
building code. Not that i EVER worry about that, but you are advised.

s

Posted by PeterD on February 1, 2009, 8:52 am

On Sat, 31 Jan 2009 21:16:30 -0600, Steve Barker TB

>AndyS wrote:

>> Andy writes:
>>
>> I have a room done in 4 X 8 sheets of hardboard, 1/4" thick, from
>> Home Depot. The "rough" side is the room side. The "rough" side
>> has a grain on it about like screen wire. The "slick" side is shiny.
>>
>> Has anyone tried to use joint compound on the "rough" side of
>> hardboard to coat or texture it ?
>>
>> I am concerned if the compound will "stick" as well as to drywall,
>> and
>> whether I should wet the hardboard before applying it ?
>>
>> Thanks for any informed opinions on this...
>>
>> Andy in Eureka, Texas

>Informed opinion? Yes, you could skim coat it, BUT:
>#1. but since it's 1/4" thick, it'll flex if someone touches it the mud
>will fall off.
>#2. If you have sheetrock behind it, disregard #1.
>#3. If you don't have sheetrock behind it, you are in violation of
>building code. Not that i EVER worry about that, but you are advised.
>s

Also consider that the backside may soak up moisture from the mud,
warp, and appear wavey.

IMHO, rip it out and do the job right with proper sheetrock.

Posted by Handplanes on February 1, 2009, 11:04 am

> Andy writes:
> =A0 =A0I have a room done in 4 X 8 sheets of hardboard, 1/4" thick, from
> Home Depot. =A0 The "rough" side is the room side. =A0 The "rough" side
> has a grain on it about like screen wire. =A0 The "slick" side is shiny.
> =A0 =A0Has anyone tried to use joint compound on the "rough" side of
> hardboard to coat or texture it ?
> =A0 =A0 I am concerned if the compound will "stick" as well as to drywall=

> and
> whether I should wet the hardboard before applying it ?
> =A0 =A0 Thanks for any informed opinions on this...

Joint compound sticks to glass - it will certainly stick to the
textured side of hardboard. As others have said, the moisture from
the compound might present problems. You might use a quick drying
primer to seal the hardboard before applying the mud.

You have a bigger problem in what to do about the joints, and how much
mud will be required. It might be more effective to install drywall
over the top of the hardboard. As Steve said, depending on your
location and code, hardboard might not meet the requirements.

R

Posted by AndyS on February 1, 2009, 11:42 am

Andy comments:

My thanks to all who have posted now and in the future...

I have taken a square foot of hardboard and plastered it with
joint compound....

When it dries, I will test it, flex it, beat it, and try to
determine
the "stickitivity"..... and I'll try to report back here what I have
learned...
It'll take at least a day.

I don't understand why hardboard can't be used as panelling or
why it would be prohibited by code. It is not prohibited where
I live, and I'd like to know the reasoning for why some codes
would not permit it.....

Thanks,

Andy in Eureka, Texas

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