Product range and technical data
Silikaty Trąbki sp. z o.o. has produced sand-lime blocks in Trąbki, Marianowo municipality (Stargard county), since 1920. The factory reopened in 1956 and was privatised in 1991. Today it operates a Dorstener HDP800 hydraulic press, and factory production control is certified by the notified body KIWA (system 2+).
| Product | Dimensions (mm) | Class | Density (t/m³) | λ (W/mK) | Weight (kg) | pcs/pallet | Notes |
|---|---|---|---|---|---|---|---|
| BTA8 | 250 × 80 × 248mm | 20 | 1,8 t/m³ | 0,81 W/(m·K) | 8.6kg | 144pcs | solid unit |
| BT12 | 250 × 120 × 248mm | 15 | 1,6 t/m³ | 0,55 W/(m·K) | 11.4kg | 96pcs | two grip holes |
| BT18 | 250 × 180 × 248mm | 15 / 20 | 1,6 t/m³ | 0,53 W/(m·K) | 16.6kg | 64pcs | two grip holes |
| BTA18 | 250 × 180 × 248mm | 15 / 20 | 1,8 t/m³ | 0,71 W/(m·K) | 19.4kg | 64pcs | solid, by special order |
| BTA18+ | 250 × 180 × 248mm | 15 / 20 | 2,0 t/m³ | 0,92 W/(m·K) | 21.0kg | 64pcs | solid, by special order |
| BT24 | 250 × 240 × 248mm | 15 / 20 | 1,4 t/m³ | 0,41 W/(m·K) | 19.7kg | 48pcs | one grip hole |
| BTA24 | 250 × 240 × 248mm | 15 / 20 | 1,8 t/m³ | 0,65 W/(m·K) | 26.0kg | 48pcs | solid, μ = 5/25 |
| BT18 1/2 | 125 × 180 × 248mm | 15 | 1,6 t/m³ | 0,53 W/(m·K) | 8.3kg | 128pcs | half block – wall ends and corners |
| BT24 1/2 | 124 × 240 × 248mm | 15 | 1,4 t/m³ | 0,41 W/(m·K) | 9.8kg | 96pcs | half block – wall ends and corners |
Consumption per 1 m² of wall: 16 blocks with adhesive mortar, 15.5 with traditional mortar. Adhesive consumption: BTA8 — 1.1 kg/m², BT12 — 1.5 kg/m², BT18 — 2.3 kg/m².
Details for each thickness — parameters, applications, quantities and documents: 24 cm · 18 cm · 12 cm · 8 cm.
How to select a block format
Foundation and basement walls
Solid units: BTA24 or BTA18. Horizontal damp-proofing with roofing felt is mandatory on the foundation; lay the first course on cement mortar.
Load-bearing walls
BT18 or BT24, thickness 18–24 cm. They provide fire protection and high sound insulation.
Walls between flats
BTA24 (Rw 58–60 dB) or BTA18+ (Rw 56–57 dB) — where quiet between units matters.
Partition walls
BTA8 or BT12. Laid after the load-bearing walls and floors are complete, with a 20–30 mm gap below the floor above.
Sand-lime properties
- Non-combustibility — reaction to fire class A1; the material releases no toxic substances. Details: fire resistance of sand-lime walls.
- Sound insulation — due to the high masonry mass; a BTA24 wall achieves Rw up to 60 dB. See the acoustic table.
- High strength — classes 15 and 20 allow slimmer load-bearing walls.
- Dimensional accuracy — T2 tolerance and the Dorstener HDP800 press allow a 2 mm thin adhesive joint.
- Thermal storage — solid masonry evens out indoor temperature fluctuations.
Documents
We issue a declaration of performance for every delivery. Products are subject to factory production control supervised by the notified body KIWA (certificate 0770-CPR-8178-01-17). Current declarations and certificates are available on the homepage.
Frequently asked questions
How many sand-lime blocks go into 1 m² of wall?
With adhesive mortar — 16 blocks per m². With traditional mortar — 15.5 blocks per m². This follows from the course module: the block is 248 mm high and the adhesive joint 2 mm, giving exactly 250 mm per course.
What are the dimensions of Trąbki sand-lime blocks?
All products have the same length of 250 mm and height of 248 mm. Only thickness varies: 80, 120, 180 and 240 mm. This creates a regular masonry grid, with bonding at half-block intervals.
Do you manufacture blocks 25, 15 or 9 cm thick?
No. We offer only thicknesses of 8, 12, 18 and 24 cm. We do not manufacture ventilation blocks either.
Do you manufacture blocks like Silka?
We produce sand-lime blocks under the same PN-EN 771-2 standard: for 8, 12, 18 and 24 cm walls, in classes 15 and 20. Silka is a Xella brand — our blocks are not products of that brand. Convert another manufacturer's block quotation to our equivalent using the block calculator.
How are the blocks packed?
On wooden pallets with a deposit. Blocks are secured with PP strapping and covered with a film hood — we do not use shrink wrap. We sell full pallets.
Prepared by the manufacturer, plant operating since 1920.
Request a quotation
We answer enquiries from the entire West Pomeranian voivodeship, as well as Lubusz and Pomeranian voivodeships. Provide the format, quantity in m² or pallets and delivery location — we will prepare a quotation including transport.