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Dry screed

SJ - 2x12,5 DFIR/PD-F

Flooring undercoat made of DFIR type Floor Boards  2 x 12.5 mm thick on a wooden base

SJ - 2x12,5 DFIR/PD-F

Technical data

Fire resistance class
Fire resistance class
EI 60 1) 
Dry screed mass
Dry screed mass
29.0 kg/m2 2) 
Acoustic insulation
Acoustic insulation
ΔRW=up to 17 dB 3) 

The maximum surface area without expansion joints is 30 m

2.

Standard

recommended recommended

Provides a lightweight and stable underlay for floors with fire resistance.
recommended

Dry screed elements

1
Norgips KP type DFIR gypsum plasterboard , thickness: 12.5 mm
2
Gypsum patch compound Norgips Start or Norgips Strong Filler
3
Levelling layer (e.g. corrugated cardboard)
4
Optional moisture insulation of insulation tar board of PE film
5
Wooden base
6
Norgips 3.5 x 25 mm wood screws or C 4/23 mm staples, max. spacing every 30 cm
7
Expansion joint - 10 mm mineral wool
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System datasheet SJ - 2x12,5 DFIR/PD-F
SJ - 2x12,5 DFIR/PD-F
SJ - 2x12,5 DFIR/PD-F
SJ - 2x12,5 DFIR/PD-F
1)

Based on classification no. LBO-046-KZ/25

2)
The weight specified does not include the levelling and insulation layers.
3)
Estimated increase in acoustic insulation effectiveness on the basis of the DIN 4109 standard

Calculator of material usage

Lining surface area m2
Swpie
Material
Unit
Consumption per 1 m2
Consumption
on {total} m2
Price
per unit*
Value

Value of materials per 1 m2 of dry screed

:
{get_calculation_per_meter} PLN

Value of materials per 1 m2 of dry screed

: {get_calculation_per_meter} PLN

Total value of materials for the dry screed surface area

:
{get_total_calculation} PLN

Total value of materials for the dry screed surface area

: {get_total_calculation} PLN

The above material consumption standards are just estimates and do not include waste resulting from material installation. The calculation does not constitute a commercial offer within the meaning of Article 66 § 1 of the Civil Code.

* In order to calculate the wall construction cost, enter material unit prices.

Project information:
Additional comments:
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PDF calculator SJ - 2x12,5 DFIR/PD-F
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XLS calculator SJ - 2x12,5 DFIR/PD-F

Files downloadable

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Declaration of Performance Declaration of Performance No. Podłogowa 12,5/N/2025 date: 13 Aug 2025 – DFIR 12,5 - EN 520

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Fire classification Fire resistance classification No. LBO – 046 – KZ/25E - Floors with dry screed floor layers made of floor gypsum plasterboards Norgips type DFIR when exposed to fire from above the floor

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Technical sheet KT - Wood screws
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Technical sheet KT - Wood screws, consumer packed
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Technical sheet KT - NORGIPS Start
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Technical sheet KT - NORGIPS KP FLOORBOARD 12.5 mm type DFIR

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Catalogues and leaflets NORGIPS solutions - DRY SCREED

VIDEO tutorials

Find out how to properly install plasterboard in a loft, build a partition wall, suspended ceiling or a dry screed. Check out our VIDEO tutorials, as well as product tests and expert recommendations.

NORGIPS floor system with a two-layer dry screed on insulation boards

The following Norgips products were used in the SJ - 2x12,5 DFIR/PD-F system

All Plasterboards Plasterboard accessories Gypsum compounds & adhesives
NORGIPS KP FLOORBOARD 12.5 mm type DFIR
NORGIPS KP FLOORBOARD 12.5 mm type DFIR
Plasterboard for flooring
more
Wood screws 3.5 x 25 mm
Wood screws 3.5 x 25 mm
Phosphate-coated screws for affixing plasterboards to wooden structures
more
Wood screws, consumer packed 3.5 x 25 mm
Wood screws, consumer packed 3.5 x 25 mm
Phosphate-coated screws for affixing plasterboards to wooden structures
more
NORGIPS Start
NORGIPS Start
Gypsum filler for grouting plasterboard joints
more

How to make a partition wall correctly? What products should be used in loft? How much does the plasterboard weigh? Our technical advisors can answer these and your other questions.

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Rafał Kaczmarczyk
Deputy Technical Support Manager
+ 48 606 800 772
[email protected]
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We believe that personal data security is a very important issue.
As a result, we provide you with information about the personal data we process. The personal data Controller is Norgips Sp. z o.o. with its registered office /02-255/ Warszawa, ul. Krakowiaków 50. Your data will be processed for the purpose of handling the inquiry you sent to us.
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