Building Supplies
Shop building supplies online at JJ Building Materials. Whether you are building an extension, renovating a property, working on a new build or ordering materials for a trade project, explore bricks, blocks, cement, aggregates, plasterboard, drainage, lintels, cladding and essential construction products in one place. Our UK builders merchant range brings together materials for groundwork, masonry, structural work and interior finishing, with options for homeowners, builders and contractors.
Find what you need by browsing our bricks and blocks, aggregates and cement, plaster and dry lining, drainage supplies, lintels, builders metalwork and external cladding. Check individual product pages for current specifications, pack sizes, prices and delivery information before ordering.
Buy Building Materials Online for Trade and DIY Projects
Ordering the right construction materials starts with the job you are doing, not simply the cheapest item in a category. A garden wall, house extension, internal partition and drainage installation all call for different products and performance requirements. Use the sections below to narrow your choice, then compare dimensions, strength grades, technical data and accessories within each range.
Bricks and Blocks
Discover facing bricks for visible masonry, engineering bricks for applications requiring the specified strength and durability, and concrete blocks for suitable wall constructions. Our selection includes products from recognised brick and block manufacturers, with different colours, textures, sizes and pack quantities. Match existing brickwork with a sample where possible and confirm the required specification before using any product in a structural or exposed location. See our facing bricks buying guide and aerated blocks buying guide.
Aggregates, Sand and Cement
Choose from aggregates and cement for bricklaying, concrete, paving, foundations and general building tasks. Building sand, sharp sand, ballast and gravel serve different purposes; they are not all suitable substitutes for one another. Consider whether mini bags or bulk bags are more practical for your site, including access, storage space and the amount of material you need. Compare our cement products alongside the correct aggregate and mixing requirements for the intended application.
Plasterboard and Plastering Supplies
For partitions, walls and ceilings, browse plasterboard sheets and plastering supplies. Options can include standard, moisture-resistant and fire-resistant plasterboard, together with jointing and finishing materials. Selecting the correct board involves more than choosing its thickness: consider the complete wall or ceiling system, the environment and any required fire, acoustic or moisture performance. Our plasterboard buying guide explains sheet sizes, edge types and common applications.
Drainage Pipes and Fittings
Explore underground drainage, drainage channels and drainage accessories for relevant domestic and commercial work. The layout, pipe dimensions, fall, loading conditions and type of drainage all influence product choice. Check fitting compatibility and use a correctly designed system, particularly where work connects to existing sewers or must meet Building Regulations.
Steel and Concrete Lintels
Our lintel range includes steel lintels and concrete lintels for appropriately designed openings. Choosing a lintel is a structural decision: span alone is not enough. Wall construction, cavity width, bearing, load and the manufacturer's loading tables all matter. Obtain the correct specification from your designer or engineer before placing an order.
Builders Metalwork and Structural Fixings
Find builders metalwork for timber and masonry connections, including products such as joist hangers, restraint straps, wall ties and brackets where listed. Check connector size, material, corrosion resistance, compatible fasteners and declared load capacity. Structural connectors should be installed with the fixings and details specified by their manufacturer. For more help, read our builders metalwork guide.
Cladding and Exterior Finishes
Explore cladding supplies to compare exterior finishes for suitable residential and commercial applications, including composite cladding and timber cladding. Select the system based on appearance, exposure, substrate, ventilation, fixing method and maintenance, as well as any applicable fire-safety requirements. Read our external cladding buying guide before choosing a finish.
Building Chemicals and Construction Accessories
From mortars and plasticisers to sealants, adhesives and specialist treatments, suitable additives and chemicals can make an important difference to the finished job. Browse additives and construction chemicals and check that every product is compatible with its substrate, installation conditions and intended use. Follow safety data sheets and technical instructions, particularly for waterproofing or damp-related work.
Joinery and Timber
For the finishing stages of a project, explore joinery supplies and our wider timber range. Products include decorative mouldings, stair components and other interior timber details. Use our joinery buying guide when planning timber finishes, or visit stair parts for handrails, newel posts and spindles.
How to Choose the Right Building Supplies
Match Materials to the Stage of Your Build
For groundwork and substructures, focus on the specified aggregates, concrete materials and drainage. For masonry, check brick or block type, mortar, lintels and necessary accessories. At first-fix and interior stages, review plasterboard, metalwork and compatible finishes. A simple written schedule organised by build stage makes it easier to identify missing materials and avoid ordering the wrong quantities.
Check Technical Specifications, Not Just Product Names
Two products described as bricks, blocks, plasterboard or lintels can have very different performance ratings. Check measurements, declared properties, relevant standards and intended applications. Where a product forms part of a fire-rated, load-bearing or moisture-control system, follow the approved design and manufacturer's installation instructions. Do not substitute materials without checking the consequences.
Calculate Quantities and Allow for Waste
Measure the actual area, length or volume needed and identify how each product is sold: individually, by sheet, by pack, in mini bags or in bulk bags. Account for openings, offcuts, breakages and the manufacturer's recommended allowances, rather than applying a single waste percentage to every material. For facing bricks, also confirm the pack quantity and mortar joint assumptions used in your estimate.
Plan Delivery and Site Access
Heavy or bulky building materials need suitable unloading and storage arrangements. Check delivery availability for your postcode, access restrictions, kerbs, weight limits and whether pallets or bulk bags can be safely received. Confirm lead times before scheduling trades around an expected arrival date. Keep materials protected in accordance with manufacturer instructions until installation.
Why Choose JJ Building Materials?
JJ Building Materials is part of the JJ Roofing Supplies group, bringing construction product knowledge and an established builders merchant background to online ordering. We stock a broad mix of materials for professional builders and home-improvement customers, making it easier to compare related categories and plan a complete project. Whether you are buying a few bags of sand, plasterboard for a renovation or masonry products for a larger build, start with the correct specification and check the product listing for up-to-date purchasing information.
Building Supplies Frequently Asked Questions
What building materials do I need for a house extension?
Requirements depend on the approved plans, but common categories include concrete and aggregates, bricks or blocks, lintels, structural connectors, drainage and internal plasterboard. Use the project's drawings and specification to create the final materials schedule.
What is the difference between facing bricks and engineering bricks?
Facing bricks are commonly selected for the visible appearance of external brickwork. Engineering bricks are classified for particular strength and water-absorption properties. Choose according to the design requirements rather than assuming one type is always better.
Which plasterboard should I buy?
It depends on the partition or ceiling design and room conditions. Standard, moisture-resistant and fire-resistant boards have different intended uses, and performance depends on the full installed system. Check our plasterboard guide for a starting point.
Should I buy building sand or sharp sand?
Building sand is typically used in appropriate bricklaying mortar mixes, while sharp sand is often used in screed and certain bedding applications. Always follow the specified mix and relevant product guidance.
Do you sell bulk building materials?
The range includes products sold in multiple formats, including selected bulk bags and brick or block packs. Check product pages for current pack sizes, availability and delivery conditions.
Can I order building supplies for delivery in the UK?
You can order eligible building materials online. Delivery options, costs and times depend on the product and destination, so review the information shown at checkout or on the product page.
How do I know which lintel or structural fixing is suitable?
Check the structural design and the manufacturer's technical documentation. Loads, support conditions, dimensions and fixing requirements must be considered by a competent person.
Building Supplies Buying Guides
Need help narrowing down your options? Our practical buying guides cover product selection, dimensions, materials and common mistakes:
- Facing Bricks Buying Guide: Colours, Textures & Choosing the Right Brick
- Aerated Blocks Buying Guide: Thermalite Sizes, Strength & Uses
- Plasterboard Buying Guide: Types, Sizes & Which Board to Use
- External Cladding Buying Guide: Composite, WPC & Porcelain Cladding
- Builders Metalwork Buying Guide: Joist Hangers, Straps & Brackets
- Joinery Buying Guide: Stair Parts, Mouldings & Timber Finishing
Ready to order? Browse the full building supplies collection above and choose products that match your project specification.