When can special SCHOMBURG screeds be trafficked / put into service, after laying?
ASO-EZ2-Plus: foot traffic after approx. 6 hours; ready to receive tiles after 4 days; full service conditions after approx. 7 days.
ASO-EZ4-Plus: foot traffic after approx. 6 hours; ready to receive tiles after 4 days; full service conditions after approx. 7 days.
ASO-EZ6-Plus: foot traffic after approx. 4 hours; ready to receive tiles after 1 day; full service conditions after approx. 7 days.
ASO-EZ2-LIGHT-Plus: foot traffic after approx. 48 hours; ready to receive tiles after 28 days; full service conditions after approx. 28 days.
Which special SCHOMBURG screeds are suitable for underfloor heating?
ASO-EZ2-Plus,ASO-EZ4-Plus,ASO-EZ6-Plus are suitable for underfloor heating. These special screeds are ready to be commissioned after only 3 days to recognised regulations.
Movement joints, control joints, what are they?
Movement joints separate the screed through its entire thickness e.g. by using expansion profiles and serve the purpose of accomodating thermally influenced length elongation.
Control joints separate the screed slab by a cut into the top third of the screed usually by a trowel cut. This control joint serves the purpose of forming a pre-determined crack point to accomodate shrinkage stresses as the screed dries out e.g. in door thresholds.
How is it best to dry a screed?
All installed screeds must be protected from draughts. In the first week after laying the screed, only the windows on the gable end should be opened a crack. Afterwards it is recommended that the air is completely exchanged (completely open the windows) for 1.5 hours, three to four times a day.
Can special SCHOMBURG screeds be applied mechanically?
Yes ASO-EZ2-Plus, ASO-EZ4-Plus, ASO-EZ6-Plus and ASO-EZ-LIGHT-Plus can be applied mechanically.
To mix them we recommend the Brinkmann Screed-boy with a 65 mm pipe diameter or other conventional screed mixers PFT. Putzmeister Mixocret or similar. Check the water addition and avoid excess water.
Can SCHOMBURG special screeds be used in exterior areas?
Externally screeds prepared with ASO-EZ2-Plus, ASO-EZ4-Plus, ASO-EZ6-Plus and ASO-EZ-LIGHT-Plus can be installed if they are covered with a suitable SCHOMBURG bonded waterproof membrane.
Can SCHOMBURG special screeds be used in wet duty areas?
In wet duty areas of class A0, A, B0, C in accordance with the ZDB data sheet, screeds with ASO-EZ2-Plus, ASO-EZ4-Plus, ASO-EZ6-Plus and ASO-EZ-LIGHT-Plus can be installed, if covered with a suitable SCHOMBURG bonded waterproof membrane.
In swimming pool tanks, wet duty class B, in accordance with the ZDB data sheet "Bonded waterproofing systems", screeds with ASO-EZ2-Plus or ASO-EZ4-Plus can be installed if covered with a suitable SCHOMBURG bonded waterproof membrane.
Minimizing screed thickness / reducing the weight per unit area with special SCHOMBURG screeds
When are SCHOMBURG special screeds ready to receive finshes?
Does a surface sealing on a freshly layed screed flooring require mechanical preparation (ie: shotblasting etc)?
The substrate must be prepared using suitable methods, so that an open-pored surface suitable to receive coatings is achieved. All adhesion inhibiting substances must be removed. This can be carried out by blast cleaning techniques, planing or similar methods.
Which bonding slurry should I use to bond cement-based screeds?
Either ASOCRET-HB-flex or alternatively a slurry coat made from the screed mortar and ASOPLAST-MZ dilued 1:1 with water.
Which screed should I ideally use on to a wooden floor over joists?
A wooden floor over joists can be negatively influenced by the installation of e.g. a cement-based screed both statically (through the weight of the screed) as well as by the water content of the screed. Frequently the required height does not exist e.g. at doorways, so that such materials cannot be incorporated. Therefore for such backgrounds we recommend the lightweight epoxy resin screed ASODUR-LE which due to its low weight per area as well as its thin application to be suitable for the critical requirements.
ASO-EZ2-Plus: foot traffic after approx. 6 hours; ready to receive tiles after 4 days; full service conditions after approx. 7 days.
ASO-EZ4-Plus: foot traffic after approx. 6 hours; ready to receive tiles after 4 days; full service conditions after approx. 7 days.
ASO-EZ6-Plus: foot traffic after approx. 4 hours; ready to receive tiles after 1 day; full service conditions after approx. 7 days.
ASO-EZ2-LIGHT-Plus: foot traffic after approx. 48 hours; ready to receive tiles after 28 days; full service conditions after approx. 28 days.
Which special SCHOMBURG screeds are suitable for underfloor heating?
ASO-EZ2-Plus,ASO-EZ4-Plus,ASO-EZ6-Plus are suitable for underfloor heating. These special screeds are ready to be commissioned after only 3 days to recognised regulations.
Movement joints, control joints, what are they?
Movement joints separate the screed through its entire thickness e.g. by using expansion profiles and serve the purpose of accomodating thermally influenced length elongation.
Control joints separate the screed slab by a cut into the top third of the screed usually by a trowel cut. This control joint serves the purpose of forming a pre-determined crack point to accomodate shrinkage stresses as the screed dries out e.g. in door thresholds.
How is it best to dry a screed?
All installed screeds must be protected from draughts. In the first week after laying the screed, only the windows on the gable end should be opened a crack. Afterwards it is recommended that the air is completely exchanged (completely open the windows) for 1.5 hours, three to four times a day.
Can special SCHOMBURG screeds be applied mechanically?
Yes ASO-EZ2-Plus, ASO-EZ4-Plus, ASO-EZ6-Plus and ASO-EZ-LIGHT-Plus can be applied mechanically.
To mix them we recommend the Brinkmann Screed-boy with a 65 mm pipe diameter or other conventional screed mixers PFT. Putzmeister Mixocret or similar. Check the water addition and avoid excess water.
Can SCHOMBURG special screeds be used in exterior areas?
Externally screeds prepared with ASO-EZ2-Plus, ASO-EZ4-Plus, ASO-EZ6-Plus and ASO-EZ-LIGHT-Plus can be installed if they are covered with a suitable SCHOMBURG bonded waterproof membrane.
Can SCHOMBURG special screeds be used in wet duty areas?
In wet duty areas of class A0, A, B0, C in accordance with the ZDB data sheet, screeds with ASO-EZ2-Plus, ASO-EZ4-Plus, ASO-EZ6-Plus and ASO-EZ-LIGHT-Plus can be installed, if covered with a suitable SCHOMBURG bonded waterproof membrane.
In swimming pool tanks, wet duty class B, in accordance with the ZDB data sheet "Bonded waterproofing systems", screeds with ASO-EZ2-Plus or ASO-EZ4-Plus can be installed if covered with a suitable SCHOMBURG bonded waterproof membrane.
Minimizing screed thickness / reducing the weight per unit area with special SCHOMBURG screeds
When are SCHOMBURG special screeds ready to receive finshes?
Does a surface sealing on a freshly layed screed flooring require mechanical preparation (ie: shotblasting etc)?
The substrate must be prepared using suitable methods, so that an open-pored surface suitable to receive coatings is achieved. All adhesion inhibiting substances must be removed. This can be carried out by blast cleaning techniques, planing or similar methods.
Which bonding slurry should I use to bond cement-based screeds?
Either ASOCRET-HB-flex or alternatively a slurry coat made from the screed mortar and ASOPLAST-MZ dilued 1:1 with water.
Which screed should I ideally use on to a wooden floor over joists?
A wooden floor over joists can be negatively influenced by the installation of e.g. a cement-based screed both statically (through the weight of the screed) as well as by the water content of the screed. Frequently the required height does not exist e.g. at doorways, so that such materials cannot be incorporated. Therefore for such backgrounds we recommend the lightweight epoxy resin screed ASODUR-LE which due to its low weight per area as well as its thin application to be suitable for the critical requirements.
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