I'm looking to lay some laminate boards on a concrete floor. The floor
has some minor deviations from a straight line of approximately max
deviation of 3mm over 2.4m. This is just beyond recommended tolerances
for the laminate.

Now on the internet a see that self levelling concrete (SLC) is
recommended. However the floor is on a slight slope ~25mm over 2.7m
width or the room, the slope is relatively constant/ i.e. in a straight
line.

I'm not sure but I think using SLC means I would need to get rid of the
slope as well as the relatively minor bumps and dips from linear.

The room is a study so I don't really care about the slope I just want
the laminate to not creak and last a while. Is there a way to get rid of
the minor deviations without tackling the slope?

I think I will probably move out in a year or two, would it be easiest
to just lay the laminate as is?

On 07/03/17 13:13, Nick wrote:
I'm looking to lay some laminate boards on a concrete floor. The floor
has some minor deviations from a straight line of approximately max
deviation of 3mm over 2.4m. This is just beyond recommended tolerances
for the laminate.

Now on the internet a see that self levelling concrete (SLC) is
recommended. However the floor is on a slight slope ~25mm over 2.7m
width or the room, the slope is relatively constant/ i.e. in a straight
line.

I'm not sure but I think using SLC means I would need to get rid of the
slope as well as the relatively minor bumps and dips from linear.

The room is a study so I don't really care about the slope I just want
the laminate to not creak and last a while. Is there a way to get rid of
the minor deviations without tackling the slope?

I think I will probably move out in a year or two, would it be easiest
to just lay the laminate as is?


The usual way is to start the job with a 6' straight edge and a big pile
of 1mm and 2mm card from an art shop. Cut card and pack any local voids.
I've done this, twice and it's been fine for many years, both times. Bit
fiddly, but in some ways easier and cheaper.

Check manufacturer's data for permissible variations in flatness (not
level) over any given length.

Nick wrote:

I'm looking to lay some laminate boards on a concrete floor
the floor is on a slight slope ~25mm over 2.7m

Will the length of the boards run along the slope, or across it?

On 07/03/2017 13:51, Andy Burns wrote:
Nick wrote:

I'm looking to lay some laminate boards on a concrete floor
the floor is on a slight slope ~25mm over 2.7m

Will the length of the boards run along the slope, or across it?

Perpendicular to the slope, so I would say across it.

I presume you are suggesting curvature is more acceptable across the
boards as they are only 192mm before they can accept a slight angle at
the join. As opposed to 1200mm length wise

But the slope itself is straight. The problem is the slight dips and bumps.

So far Tim's solution sounds promising. At least I'm far less depressed
now than I was this morning.

On 07/03/2017 13:13, Nick wrote:
I'm looking to lay some laminate boards on a concrete floor. The floor
has some minor deviations from a straight line of approximately max
deviation of 3mm over 2.4m. This is just beyond recommended tolerances
for the laminate.

Now on the internet a see that self levelling concrete (SLC) is
recommended. However the floor is on a slight slope ~25mm over 2.7m
width or the room, the slope is relatively constant/ i.e. in a straight
line.

I'm not sure but I think using SLC means I would need to get rid of the
slope as well as the relatively minor bumps and dips from linear.

The room is a study so I don't really care about the slope I just want
the laminate to not creak and last a while. Is there a way to get rid of
the minor deviations without tackling the slope?

I think I will probably move out in a year or two, would it be easiest
to just lay the laminate as is?

IIRC SLC is rally a self smothing compund whic will fill the hollows but
not swlump down to the lowest point

Malcolm

Malcolm Race Wrote in message:
On 07/03/2017 13:13, Nick wrote:
I'm looking to lay some laminate boards on a concrete floor. The floor
has some minor deviations from a straight line of approximately max
deviation of 3mm over 2.4m. This is just beyond recommended tolerances
for the laminate.

Now on the internet a see that self levelling concrete (SLC) is
recommended. However the floor is on a slight slope ~25mm over 2.7m
width or the room, the slope is relatively constant/ i.e. in a straight
line.

I'm not sure but I think using SLC means I would need to get rid of the
slope as well as the relatively minor bumps and dips from linear.

The room is a study so I don't really care about the slope I just want
the laminate to not creak and last a while. Is there a way to get rid of
the minor deviations without tackling the slope?

I think I will probably move out in a year or two, would it be easiest
to just lay the laminate as is?

IIRC SLC is rally a self smothing compund whic will fill the hollows but
not swlump down to the lowest point

Malcolm


+1
--
Jim K


----Android NewsGroup Reader----
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In article ,
Nick wrote:
I'm looking to lay some laminate boards on a concrete floor. The floor
has some minor deviations from a straight line of approximately max
deviation of 3mm over 2.4m. This is just beyond recommended tolerances
for the laminate.

Now on the internet a see that self levelling concrete (SLC) is
recommended. However the floor is on a slight slope ~25mm over 2.7m
width or the room, the slope is relatively constant/ i.e. in a straight
line.

I'm not sure but I think using SLC means I would need to get rid of the
slope as well as the relatively minor bumps and dips from linear.

The room is a study so I don't really care about the slope I just want
the laminate to not creak and last a while. Is there a way to get rid of
the minor deviations without tackling the slope?

I think I will probably move out in a year or two, would it be easiest
to just lay the laminate as is?

Laminate has zero stretch. If you want a decent job the floor will have to
be flat to within the limits the makers say. A sloping flat floor wouldn't
make any difference to the laminate.

It's one of these things where a carpet - which does stretch - could make
more sense.

--
*Therapy is expensive, poppin' bubble wrap is cheap! You choose.

Dave Plowman London SW
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