Armstart

MEDIUM DENSITY AGGREGATE FOUNDATION BLOCKS
(4.8 stars) • 10 reviews
Description:

Widely used by major housebuilders, Armstart offers an efficient, simple and cost-effective method of block construction below damp proofing course (DPC) saving on labour and mortar.

Manufactured in a range of width / length combinations, these Medium Density Foundation Blocks are a faster, simpler and safer method when compared to constructing cavity foundation walls. No wall ties are required, no cavity filling and no danger of collapsed cavities. Resulting in faster build rates, less mortar and less repetitive manual handling. Weighing less than 20kg, these lightweight concrete blocks contain a significant proportion of recycled and reclaimed raw material.

Our Armstart Foundation blocks are manufactured to BS EN 771-3 and are ISO 9001 Quality Assured, ISO 14001 Environmentally Certified and hold BES 6001 Responsible Sourcing certification.

Applications:
  • Solid foundation walls from 250mm-350mm thick to suit cavity widths of 75mm-150mm.
  • Solid foundation walls below damp-proof course (DPC).
  • Suitable for soil conditions up to DS-3 as defined in BRE Special Digest
  • A range of strengths available to suit both low and high-rise buildings.
  • Each block offers 2 alternative widths.
Key Advantages:
  • Below 20kg in weight to comply with HSE and CDM guidelines on repetitive manual handling safety.
  • A simple and safer alternative to cavity foundation wall; no wall ties required, cavity filling or danger of collapsed cavities, faster build rates, less mortar and repetitive manual handling required.
  •  100% recyclable, inert and non-hazardous at the end of use
UKCA Certifications:
Documents:
Property
Reference
Values
Block Height
BS EN 771-3
140mm
Available Sizes (L x W)
300mm x 275mm
350mm x 215mm
350mm x 250mm
Dimensional Tolerance
BS EN 772-16
Category D1
Gross Dry Density
BS EN 772-13
1450 - 1550 kg/m³
Mean Compressive Strengths
BS EN 772-1
7.3 N/mm²
Manufacturing Category
BS EN 771-3
Category II
Design Thermal Conductivity
BS EN 1745
0.49 W/mK
Moisture Movement
BS EN 772-14
< 0.6 mm/m
Fire Resistance
BS EN 13501-1
Class A1 Reaction to Fire
Configuration
BS EN 1996-1-1
Solid - Group 1
Available Texture Finish
Standard
Block Size (L x H x W)
Blocks per Pack
Blocks per m²
Blocks per Linear m²
Linear per m² per Pack
Laying orientation
300mm x 275mm
72 / 63
21.5
3.23
22.32 / 19.53
If walled 300mm length (a 275 wide wall)
300mm x 275mm
72 / 63
23.4
3.51
20.52 / 17.96
If walled 275mm length (a 300 wide wall)
350mm x 250mm
48 / 56
18.5
2.78
17.28 / 20.16
If walled 350mm length (a 250 wide wall)
350mm x 250mm
48 / 56
25.6
8.4 or 8.6
12.48 / 14.56
If walled 250mm length (a 350 wide wall)
350mm x 215mm
70
29.6
4.44
15.75
If walled 215mm length (a 350 wide wall)
Thomas Armstrong Concrete Blocks Properties Table info icon

There are two sets of values for some products due to our pack sizes varying at different manufacturing locations. Please check details with your nearest sales office. Block weights quoted are approximate and include the typical additional weight from the natural moisture content although this can vary slightly.

The m² figures include the conventional 10mm mortar joint.
Pack size quantities may vary between manufacturing locations. Always check details with your nearest sales office.

Contact

General Enquiries

At Thomas Armstrong (Concrete Blocks) Ltd we pride ourselves on our high level of customer service across the company. Our friendly staff will be more than happy to help answer any questions you have relating to sales and our products as well as any technical advice you have. Please contact our local office (see offices) near you today!

Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
By clicking “Accept”, you agree to the storing of cookies on your device to enhance site navigation, analyse site usage, and assist in our marketing efforts. View our Privacy Policy for more information.