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Posted by Ray K on May 12, 2008, 11:18 pm
After stripping the flooring to the bare concrete slab, I removed the
wood trim at the bottom of the wall. There is an irregular 1/4" gap
between the slab and foundation along the complete length of the outside
walls. Most likely, the gap is due to shrinkage over the 40 years since
the house was built.
I'm planning to install a Pergo-type laminate floor over the recommended
vinyl vapor barrier. I'll extend the barrier up the walls 1-1/2", so it
covers the gap but will be concealed by the new floor molding. Should I
fill the gap, with caulk or some other flexible material?
Thanks,
Ray
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Posted by Mikepier on May 13, 2008, 6:34 am
> After stripping the flooring to the bare concrete slab, =A0I removed the
> wood trim at the bottom of the wall. There is an irregular 1/4" gap
> between the slab and foundation along the complete length of the outside
> walls. Most likely, the gap is due to shrinkage over the 40 years since
> the house was built.
>
> I'm planning to install a Pergo-type laminate floor over the recommended
> vinyl vapor barrier. I'll extend the barrier up the walls 1-1/2", so it
> covers the gap but will be concealed by the new floor molding. Should I
> fill the gap, with caulk or some other flexible material?
>
> Thanks,
>
> Ray
Try the Great Stuff expandable foam.
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Posted by on May 13, 2008, 9:59 am
>
> > After stripping the flooring to the bare concrete slab, =A0I removed the=
> > wood trim at the bottom of the wall. There is an irregular 1/4" gap
> > between the slab and foundation along the complete length of the outside=
> > walls. Most likely, the gap is due to shrinkage over the 40 years since
> > the house was built.
>
> > I'm planning to install a Pergo-type laminate floor over the recommended=
> > vinyl vapor barrier. I'll extend the barrier up the walls 1-1/2", so it
> > covers the gap but will be concealed by the new floor molding. Should I
> > fill the gap, with caulk or some other flexible material?
>
> > Thanks,
>
> > Ray
>
> Try the Great Stuff expandable foam.
Many houses have a french drain for drainage where the slab meets the
walls. Though it's usually wider than 1/4", more like an inch.
Also, your construction technique here seems a bit odd, as is sounds
like your planning on putting the floor molding right up against the
foundation wall? No inside wood framing or furring stips for
sheetrock or similar?
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Posted by Ray K on May 23, 2008, 10:35 am
trader4@optonline.net wrote:
>
>>
>>
>>> After stripping the flooring to the bare concrete slab, I removed the
>>> wood trim at the bottom of the wall. There is an irregular 1/4" gap
>>> between the slab and foundation along the complete length of the outside
>>> walls. Most likely, the gap is due to shrinkage over the 40 years since
>>> the house was built.
>>>
>>> I'm planning to install a Pergo-type laminate floor over the recommended
>>> vinyl vapor barrier. I'll extend the barrier up the walls 1-1/2", so it
>>> covers the gap but will be concealed by the new floor molding. Should I
>>> fill the gap, with caulk or some other flexible material?
>>>
>>> Thanks,
>>>
>>> Ray
>>>
>> Try the Great Stuff expandable foam.
>>
>
> Many houses have a french drain for drainage where the slab meets the
> walls. Though it's usually wider than 1/4", more like an inch.
>
> Also, your construction technique here seems a bit odd, as is sounds
> like your planning on putting the floor molding right up against the
> foundation wall? No inside wood framing or furring stips for
> sheetrock or similar?
>
Standard sheetrock construction. Floor molding will be nailed to sill plate.
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Posted by Norminn on May 13, 2008, 10:31 am
Ray K wrote:
> After stripping the flooring to the bare concrete slab, I removed the
> wood trim at the bottom of the wall. There is an irregular 1/4" gap
> between the slab and foundation along the complete length of the
> outside walls. Most likely, the gap is due to shrinkage over the 40
> years since the house was built.
>
> I'm planning to install a Pergo-type laminate floor over the
> recommended vinyl vapor barrier. I'll extend the barrier up the walls
> 1-1/2", so it covers the gap but will be concealed by the new floor
> molding. Should I fill the gap, with caulk or some other flexible
> material?
>
> Thanks,
>
> Ray
I'm a bit confused ........ is the gap on the outside of the house or is
it the gap on the inside, between drywall and the slab?
It is normal for there to be a gap on inside at the bottom of drywall;
it is the reason for being for baseboards. If drywall
went to the floor, it would not allow for expansion/contraction or settling.
When we repainted and tiled our LR/DR, I put color-matched caulk along
the baseboards all around. I was thinking,
at the time I did it, that wet mopping might get under the baseboard a
little bit, get absorbed by bare wood and cause
the paint to crack or peel. It was only a few months later that our
washer hose broke and flooded kitchen and DR.
Caulking the baseboard helped contain the flood :o)
We have a neighbor who had a brand new Pergo-type floor whose water
heater died and flooded his place,
ruining his floor. The vapor barrier is great for protection from
moisture outside the layer of flooring, but you
need to prevent any water from inside getting under the flooring - it is
composite and will be trashed by water.
I don't have Pergo, and would not want it for that reason. Pergo
instructions, in part:
"The expansion spaces, all expansion spaces,between the Pergo flooring
and walls, the doorway
transition or other fixed objects such as pipes for radiators, sinks,
water supply to water closet or toilet
flanges MUST be sealed with Pergo Sealant or 100% mildew-resistant silicone.
b. The space around the perimeter of the Pergo floor
must be 1⁄4" wide and sealed prior to installing the wall trim. The 1⁄4"
expansion space must be completely
filled with sealant to avoid water getting underneath the floor."
Here is a link:
http://www.pergo.com/images/pdfs/Install_Essentials.pdf
As I understand laminate flooring, keeping moisture out of it is CRITICAL.
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