subflooring osb

STAUF Klebstoffwerk GmbH, Wilnsdorf
Excellence from the ground up! For more than 180 years.
Primers &
Damp Proof Membranes (DPM)
Santiago de Chile/Wilnsdorf via Skype, 27.01.2012
www.stauf.info
Product Overview
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Suitable Sub Floors & Primers
WFR-360 SMP-950 SPU-560 PUK-446
Consumption (STAUF notched trowel no. 3)
Suitable sub floors
Sanded mastic asphalt screed
Concrete B25 (non-skid surface)
Calcium sulphate (flow) floors
Wooden planks, solid wood fibre boards
STAUF levelling compounds for wood flooring
Chipboards V100 (E1), OSB boards
Cement floors
Suitable primers
VDP-130
VLM-100
VPU-155
VEP-190
850 g/m²
900 g/m² 1100 g/m² 1000 g/m²
X
X
X
X
X
X
X
**)
X
X
X
X
X
X
X
*)
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
*) = possible after priming with STAUF VEP-190 / **) = only when sanded with DRY sand
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STAUF VDP-130
Primer (water based):
•Suitable for all STAUF adhesives
•Fast drying
•Easy to apply
•Creates an uniformly absorbent surface
•Dust binding
•Low consumption
•Good penetration
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STAUF VPU-155
Primer/Damp proof membrane (1c-PUR):
•Primer for STAUF PUK, SMP, SPU-adhesives
•Damp proof membrane up to 4 CM% (2 layers) on cement floors
•Solvent-free
•Reduces tensions
•Improves stability on weak sub floors
•Creates a dust free surface
•Has to be sanded with DRY sand before applying levelling compound
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STAUF VEP-190
Primer/Damp proof membrane (2c-Epoxy resin):
•Excellent adhesion
•Very good penetration
•Damp proof membrane up to 6% (2 layers)
•Primer for STAUF PUK, SMP, SPU-adhesives
•Easy to apply
•Suitable on mastic asphalt
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Overview Primers/Damp proof membranes
1st layer
2nd layer
Damp proof membrane
Residual moisture in rel.humidity
Drying time (absorbent subfloors)
VDP-130
150 g/m²
< 30 min.
VPU-155
150 g/m²
250 g/m²
4 CM%
90%
1 hr./4 hrs.
VEP-190
400 g/m²
350 g/m²
5 CM%
95%
~ 24 hrs.
SMP-950 *)
1900 g/m²
4 CM%
90%
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Suitable subfloors
Sanded Mastic asphalt screed
Mastic asphalt screed without sanding
Concrete B25 (non-skid surface)
Calcium sulphate (flow) screeds
Wooden planks, solid wood fibre boards
Unlaminated gypsum fibre boards
Chipboards V100 (E1), OSB boards
Stone, ceramic terazzo, tiles
Cement floors
Cement floors with residual moisture
Bonded screed ZE30
X
X
X
X
X
X
X
o
*) with STAUF notched trowel no. 12; glue application with DPM & bonding in one step
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STAUF Levelling compounds
Ibola FZ / Ibola OS (cementious):
•Self levelling
•Pumpable
•Good sandable
•To level hight differences
•Creates a plain & smooth surface
•Up to 60 mm (FZ)/ 5 mm (OS)
Drying times depend on layer thickess and climatic conditions (humidity, temperature).
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Sub Floor Humidity
What happens during the drying of screeds?
Is there water (liquid) or water vapour (gaseous) present?
CM%
% by weight
% rel. humidity
Remark
>4
>6
100
Liquid water is present in the
pores of the screed *)
2–4
3,5 – 6
70 – 100
Water vapour & partially
liquid water is present in the
pores (balanced) **)
<2
< 3,5
< 70
Screed is ready to receive
parquet etc. without DPM
*) A damp proof membrane has to be water-proof and has to have a resistance against water vapour diffusion.
**) A damp proof membrane must have a certain water vapur permability to function as DPM to reduce the and
control the water vapur diffusion from the subfloor.
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Definition of DPMs
A vapor barrier is a layer that is installed on the warm side of a construction (usually the inside) and prevents the
water vapor diffusion. It is to prevent an unacceptably high level of penetration of the insulating layer by diffusing
water vapor. It can simultaneously assume the duties of an air sealing layer.
The moisture protection values of individual materials are defined in DIN 4108-4. The water vapor diffusion
resistance factor µ is the thickness of the considered building material (in meters) times the so-called sd-value
(water-vapor diffusion equivalent air layer thickness) of the considered component layer. This indicates the
diffusion-openness or tightness of a device layer.
DIN 4108-3 defines
-Component layers with an sd-value of ≤ 0.5 m as permeable layer,
-Component layers with an sd-value of greater than 0.5 m and less than 1500 m as a diffusion inhibiting layer
(vapor barrier),
-Component layers with an sd-value of ≥ 1500 m as a diffusion-proof layer (vapor barrier).
Usually DPMs are often called moisture barriers but this technically not correct.
Real barriers are only metal (aluminum or copper foil) and glass..
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Properties of DPMs
To be effective as a DPM the corresponding primer has to have as resistace to water vapor
diffusion
Water vapor diffusion resistance factor (µ-value)
Material parameter, without unit
The µ-value is the diffusion resistance of a material in relation to an equal thickness of air.
To determine the vapor barrier effect a DPM sd -value is used. It is calculated from the µ-value and
thickness of the material.
It indicates how thick a layer of air (in meters) has to be in order to have the same water vapor
diffusion resistance as the corresponding material with thickness d.
sd = µ * d
The µ-value is a material parameter. In practice, the applied layer thickness is therefore crucial 
sd -value.
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Properties of DPMs
µ-Value
< 50
open
> 50
permeable
from 15.000
inhibiting
from 100.000
diffusion-proof
sd-Value < 0,5 m
permeable
0,5 – 1500 m
inhibiting
DPM accord. to
DIN, e.g. PE foil
> 1500 m
diffusion-proof
Barrier accord.
nach DIN, e.g.
Aluminium foil)
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Properties of DPMs
Why use DPMs?
Shortend construction times require solutions to lay parquet although the subfloor is not
ready for installation.
Functions:
Adhesion promoting
Sub floor preparation for levelling and bonding
Reduced & controlled water vapour transmission from the sub floor
Protection of flooring construction against humidity from the sub floor
Improvement (hardness) of screed surface (2c Epoxy resin, 1c PUR)
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Types of DPMs
2c Epoxy resin (STAUF VEP-190)
1c Polyurethane (STAUF VPU-155)
Polymer-based dispersions (STAUF VDP-160)
Silane-based (STAUF VSP-110)
Only for sub floors that are NOT sensible against moisture! (cement screed, concrete)
Not suitable against continously uprising moisture!
Continously uprising moisture may NOT be capsuled as this would cause damage to the sub floor that
might destroy the whole flooring construction!
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Construction Of A Moisture Barrier
The screed has to be cleaned and
free of dirt, dust, etc.
VEP-190
2-component Epoxy resin
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Construction Of A Moisture Barrier
Fill hardener completely into lower part
of drum.
Thorough mixing of the two
components with an electrical stirrer.
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Construction Of A Moisture Barrier
Distribute VEP-190 smoothly and
carefully with a roller
(approx. 300 g/m²)
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Construction Of A Moisture Barrier
After drying of at least 12 hrs. apply
2. Layer of VEP-190
Afterwards sanding with approx.
3 kg/m² of quartz sand
If glueing is done within 24 – 48 hrs.
with STAUF SMP, SPU or PUK
adhesives, there is no use of quartz
sand necessary.
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