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Fastening down Wonderboard to floor joists

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Fastening down Wonderboard to floor joists Sammy bin Snoozin 10-20-2007
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Posted by Sammy bin Snoozin on October 20, 2007, 1:03 pm
What's the best way to do this? Below is from Eric Gurney 7/21/2000 =
which is the best I could find with google...

From =
http://www.custombuildingproducts.com/onlyproducts/WonderBoard12.htm=20
(link no longer good)

Fasteners: Galvanized roofing nails, 1 1/2" (38 mm) long with hot-dipped =

galvanized coating for use with wood framing. Nails should meet Federal=20
Specification #FF-N105B/type 2 style 20. Custom Concrete Backerboard =
Screws=20
or equivalent, 1 1/4" (32 mm) long, for use with wood or 20 gauge steel=20
framing.=20

Underlayment: Using a 1/4" (6 mm) square-notched trowel, apply a setting =
bed=20
of latex-modified mortar to the subfloor or base. Immediately laminate =
1/2"=20
WonderBoard Concrete Backerboard to subfloor base, leaving a 1/8" - =
3/16"
(3 - 5 mm) space between boards at all joints and corners. Stagger =
joints so=20
they do not line up with underlying substrate joints. Fasten backerboard =

every 6" - 8" (15.2 - 20.3 cm) o.c. throughout board field and around =
all=20
edges while setting bed mortar is still workable. Around perimeter of =
each=20
board, locate fasteners within 1/2" - 2" (1.2 - 5.1 cm) of edge. Fill =
all=20
joints and corners solid with latex-modified mortar. Taping of floor and =

counter joints is not required.=20

Sam




AppliancePartsPros.com, Inc.
Posted by Robert Allison on October 20, 2007, 1:44 pm
Sammy bin Snoozin wrote:

> What's the best way to do this? Below is from Eric Gurney 7/21/2000 which is
the best I could find with google...
>
> From http://www.custombuildingproducts.com/onlyproducts/WonderBoard12.htm
> (link no longer good)
>
> Fasteners: Galvanized roofing nails, 1 1/2" (38 mm) long with hot-dipped
> galvanized coating for use with wood framing. Nails should meet Federal
> Specification #FF-N105B/type 2 style 20. Custom Concrete Backerboard Screws
> or equivalent, 1 1/4" (32 mm) long, for use with wood or 20 gauge steel
> framing.
>
> Underlayment: Using a 1/4" (6 mm) square-notched trowel, apply a setting bed
> of latex-modified mortar to the subfloor or base. Immediately laminate 1/2"
> WonderBoard Concrete Backerboard to subfloor base, leaving a 1/8" - 3/16"
> (3 - 5 mm) space between boards at all joints and corners. Stagger joints so
> they do not line up with underlying substrate joints. Fasten backerboard
> every 6" - 8" (15.2 - 20.3 cm) o.c. throughout board field and around all
> edges while setting bed mortar is still workable. Around perimeter of each
> board, locate fasteners within 1/2" - 2" (1.2 - 5.1 cm) of edge. Fill all
> joints and corners solid with latex-modified mortar. Taping of floor and
> counter joints is not required.
>
> Sam

If you are trying to fasten wonderboard directly to floor
joists, then there is your problem. The reason that you can
find no instructions on how to do it, is because you cannot do
it. Wonderboard cannot bridge floor joists, so you must have
and underlayment to support it. Then you fasten the
wonderboard to the underlayment.


--
Robert Allison        
Rimshot, Inc.
Georgetown, TX

Posted by Sammy bin Snoozin on October 21, 2007, 1:00 pm
Ah so! Thanks. What is underlayment?

> Sammy bin Snoozin wrote:
>=20
> > What's the best way to do this? Below is from Eric Gurney 7/21/2000 =
which is the best I could find with google...
> >=20
> > From =
http://www.custombuildingproducts.com/onlyproducts/WonderBoard12.htm=20
> > (link no longer good)
> >=20
> > Fasteners: Galvanized roofing nails, 1 1/2" (38 mm) long with =
hot-dipped=20
> > galvanized coating for use with wood framing. Nails should meet =
Federal=20
> > Specification #FF-N105B/type 2 style 20. Custom Concrete Backerboard =
Screws=20
> > or equivalent, 1 1/4" (32 mm) long, for use with wood or 20 gauge =
steel=20
> > framing.=20
> >=20
> > Underlayment: Using a 1/4" (6 mm) square-notched trowel, apply a =
setting bed=20
> > of latex-modified mortar to the subfloor or base. Immediately =
laminate 1/2"=20
> > WonderBoard Concrete Backerboard to subfloor base, leaving a 1/8" - =
3/16"
> > (3 - 5 mm) space between boards at all joints and corners. Stagger =
joints so=20
> > they do not line up with underlying substrate joints. Fasten =
backerboard=20
> > every 6" - 8" (15.2 - 20.3 cm) o.c. throughout board field and =
around all=20
> > edges while setting bed mortar is still workable. Around perimeter =
of each=20
> > board, locate fasteners within 1/2" - 2" (1.2 - 5.1 cm) of edge. =
Fill all=20
> > joints and corners solid with latex-modified mortar. Taping of floor =
and=20
> > counter joints is not required.=20
> >=20
> > Sam
>=20
> If you are trying to fasten wonderboard directly to floor=20
> joists, then there is your problem. The reason that you can=20
> find no instructions on how to do it, is because you cannot do=20
> it. Wonderboard cannot bridge floor joists, so you must have=20
> and underlayment to support it. Then you fasten the=20
> wonderboard to the underlayment.
>=20
>=20
> --=20
> Robert Allison=20
> Rimshot, Inc.
> Georgetown, TX

Posted by Sammy bin Snoozin on October 21, 2007, 1:04 pm
I meant... what kind of underlayment, how thick, etc? Makes sense, but =
adding any thickness will bring the new section higher than the rest of =
the floor.

Ah so! Thanks. What is underlayment?

> Sammy bin Snoozin wrote:
>=20
> > What's the best way to do this? Below is from Eric Gurney 7/21/2000 =
which is the best I could find with google...
> >=20
> > From =
http://www.custombuildingproducts.com/onlyproducts/WonderBoard12.htm=20
> > (link no longer good)
> >=20
> > Fasteners: Galvanized roofing nails, 1 1/2" (38 mm) long with =
hot-dipped=20
> > galvanized coating for use with wood framing. Nails should meet =
Federal=20
> > Specification #FF-N105B/type 2 style 20. Custom Concrete Backerboard =
Screws=20
> > or equivalent, 1 1/4" (32 mm) long, for use with wood or 20 gauge =
steel=20
> > framing.=20
> >=20
> > Underlayment: Using a 1/4" (6 mm) square-notched trowel, apply a =
setting bed=20
> > of latex-modified mortar to the subfloor or base. Immediately =
laminate 1/2"=20
> > WonderBoard Concrete Backerboard to subfloor base, leaving a 1/8" - =
3/16"
> > (3 - 5 mm) space between boards at all joints and corners. Stagger =
joints so=20
> > they do not line up with underlying substrate joints. Fasten =
backerboard=20
> > every 6" - 8" (15.2 - 20.3 cm) o.c. throughout board field and =
around all=20
> > edges while setting bed mortar is still workable. Around perimeter =
of each=20
> > board, locate fasteners within 1/2" - 2" (1.2 - 5.1 cm) of edge. =
Fill all=20
> > joints and corners solid with latex-modified mortar. Taping of floor =
and=20
> > counter joints is not required.=20
> >=20
> > Sam
>=20
> If you are trying to fasten wonderboard directly to floor=20
> joists, then there is your problem. The reason that you can=20
> find no instructions on how to do it, is because you cannot do=20
> it. Wonderboard cannot bridge floor joists, so you must have=20
> and underlayment to support it. Then you fasten the=20
> wonderboard to the underlayment.
>=20
>=20
> --=20
> Robert Allison=20
> Rimshot, Inc.
> Georgetown, TX

Posted by Robert Allison on October 21, 2007, 3:27 pm
Sammy bin Snoozin wrote:
> I meant... what kind of underlayment, how thick, etc? Makes sense, but adding
any thickness will bring the new section higher than the rest of the floor.

Please don't top post.

Underlayment thickness is determined by what you intend to put
on it, spacing of the floor joists and material used for
underlayment, including how it is installed.

> Ah so! Thanks. What is underlayment?
>
>
>>Sammy bin Snoozin wrote:
>>
>>
>>>What's the best way to do this? Below is from Eric Gurney 7/21/2000 which is
the best I could find with google...
>>>
>>>From http://www.custombuildingproducts.com/onlyproducts/WonderBoard12.htm
>>>(link no longer good)
>>>
>>>Fasteners: Galvanized roofing nails, 1 1/2" (38 mm) long with hot-dipped
>>>galvanized coating for use with wood framing. Nails should meet Federal
>>>Specification #FF-N105B/type 2 style 20. Custom Concrete Backerboard Screws
>>>or equivalent, 1 1/4" (32 mm) long, for use with wood or 20 gauge steel
>>>framing.
>>>
>>>Underlayment: Using a 1/4" (6 mm) square-notched trowel, apply a setting bed
>>>of latex-modified mortar to the subfloor or base. Immediately laminate 1/2"
>>>WonderBoard Concrete Backerboard to subfloor base, leaving a 1/8" - 3/16"
>>>(3 - 5 mm) space between boards at all joints and corners. Stagger joints so
>>>they do not line up with underlying substrate joints. Fasten backerboard
>>>every 6" - 8" (15.2 - 20.3 cm) o.c. throughout board field and around all
>>>edges while setting bed mortar is still workable. Around perimeter of each
>>>board, locate fasteners within 1/2" - 2" (1.2 - 5.1 cm) of edge. Fill all
>>>joints and corners solid with latex-modified mortar. Taping of floor and
>>>counter joints is not required.
>>>
>>>Sam
>>
>>If you are trying to fasten wonderboard directly to floor
>>joists, then there is your problem. The reason that you can
>>find no instructions on how to do it, is because you cannot do
>>it. Wonderboard cannot bridge floor joists, so you must have
>>and underlayment to support it. Then you fasten the
>>wonderboard to the underlayment.
>>
>>
>>--
>>Robert Allison
>>Rimshot, Inc.
>>Georgetown, TX
>
>


--
Robert Allison        
Rimshot, Inc.
Georgetown, TX

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