Design with size, design with colour… design with Fireborn®

A range of large format clay blocks available in a range of colours, textures and sizes up to 440mm.

For more information please contact or call 0844 736 0350.

Fireborn Natural Cream-Unilever, Ibstock Special Bricks
Uses less mortarSaves cost and time
Give appearance of rainscreenHalf the cost of equivalent rainscreen
It is faster to laySaves time on site with scaffold cost and site overheads
One 215mm block like laying 3 bricks
One 327mm block like laying 4.5 bricks
One 440mm block like laying 6 bricks
Made in the UKLess transport so environmentally friendly. Unforeseen problems can be dealt with faster
All supplied from one batchConsistency of colour and size
Strict size tolerance. +/- 3mm. and batches gauged for consistencyEasier to work with and ideal for stack bonding
Made from special clays from a separate weathered stockpile to ensure consistent quality and project managementConsistent, durable and guaranteed
As easy to lay as any other large format product. e.g. concrete block, stone etc.No new skills needed
Material cost per sq.m. not a lot more than a good quality handmade brickHigh standard product at a reasonable cost
Free design adviceAdded confidence from the experts with over thirty years of experience
Ongoing support to contractors on site with contact managementLess defects and less waste, plus a better building
Highly perforatedImproves sustainability and ease of handling
Lightweight – lighter than concrete – manual handling single man lift
Dedicated sales office team with Fireborn expertiseFast, knowledgeable response
Range of fittings readily availableIncrease design potential
Fired clay masonry is well tried and proven over hundreds of yearsVirtually maintenance free
Easily used in conjunction with other materials. e.g. brick, rainscreen, glass etc.Does not limit use
Available in natural terracotta colours together with a pallet of glazed colours in most sizesGreat choice for specifiers
Made and sold under the Ibstock Brick nameWarranty and support
Ex-stockImmediate delivery
Used on over 1000 projectsBuy/sell with confidence
102mm WidthStability and ease of laying
Lighter than equivalent concrete blockOne man lift – easy to handle


For normal elevations an M6 mortar [1:1/2:41/2 cement:lime:sand] will be suitable when used at a consistency appropriate for the weight of the units. For stack bonding, stainless steel ladder type bed joint reinforcement should be used at each course.

Products available in all Fireborn size formats

All Fireborn® blocks are F2 durable (BS EN 771-1)

( ≥N/mm²)
( ≤% Weight)
Voids (%)
Natural Red60833
Natural Blue60833
Natural Cream60833

Approximate weights/unit

Colour/Product327 x 215 (kg)327 x 140 (kg)215 x 215 (kg)Freedom (kg/m2)440 x 215 (kg)490 x 190 (kg)
Natural Red117.27.416013.814.6
Natural Blue117.27.416013.814.6
Natural Cream10.36.56.816013.513.5

Ibstock Product Specification Clauses

For Specification Clauses please contact our Technical Dept or our Design Advisor Team

Mortar Mix

For normal elevations a designation (ii) mortar mix (1:½:4½ cement:lime:sand) will be suitable when used at a stiff consistency appropriate for the weight of the units.

Pack Sizes

Fireborn blocks are packed on pallets with interleaving paper, shrinkwrapped and are Fireborn branded. Handling and laying instructions are included with each pack.

No. of Units /PackAverage dry pack weight (kg)Coverage /pack including joint m²Coverage /m2
incl. joint
327mm x 215mm x 102mm12013509.1013.19
215mm x 215mm x 102mm17512798.8619.75
440mm x 215mm x 102mm8011308.109.87

The above information does not apply to Glazed units.

Stack-bonded Fireborn®

  • Bed joint reinforcement is required.
  • Use every course for 215 mm high Fireborn.
  • Bed joint reinforcement is readily available from manufacturers such as Ancon, Bekaert and Brikmat.
  • As an alternative use Twin Block which can be laid in strecher bond and generally needs no reinforcement. This will save time and money on site.

Quality Control

  • Fireborn is made to uniquely tight tolerance which is ideal for stack bonding.
  • Fireborn is individually gauged and batched. There are three size bands ‘L’, ‘M’ and ‘H’ into which Fireborn is batched, thus providing the tightest tolerances in the market.
  • Each product is also colour checked with the Colourimeter, to ensure consistent and repeatable colour.

Blue Products

Natural blue Fireborn sometimes exhibits an oily coloured type of stain, generally referred to as ‘peacocking’. It is caused by light diffraction through a very thin surface layer of colloidal silica and it is noticeable because of the iridescent effect of the blue colour.
The staining is usually a result of:-

  • a) Saturation of brickwork prior to the mortar curing – giving a picture frame effect.
  • b) Fireborn coming into contact with copious amounts of water before being built in. The manufacturing process uses a layer of silica sand to separate the bricks during the firing process. Without this the bricks would fuse together in the kiln. The residue of silica on the bricks can turn blotchy when saturated.
  • c) Water run-off from cementitious areas.
  • d) A fine deposit of cement or lime transmitted to fine crazing lines by the moisture in the mortar at the time of laying.

All of the above are superficial; are not detrimental to the performance of Fireborn and all may be minimised by protection from saturation during construction. It is a normal phenomenon of natural blue fired clay products and it should be expected to happen.
Cleaning down with high pressure washers is not recommended!

Health & Safety

Laying Guidelines