Building Materials Discount Codes & Deals for March 2026

1. Find a Building Materials voucher code from our NetVoucherCodes page and press ‘Copy’.
2. The homepage will open up in a new tab, ready for you to start shopping.
3. Add your chosen products to your basket on Building Materials Nationwide.
4. Head to checkout when you’re ready to place the order.
5. Look for the discount or promo code box during checkout.
6. Paste in your Building Materials discount code from NetVoucherCodes.
7. Apply the code and check that your order total updates before paying.
8. On bigger orders, I’d always double-check the full total after any code is applied, especially where delivery charges or supplier-specific surcharges may still apply.

Building materials are a must if i’m buying more than just one or two items. I first came across it when looking for plasterboard and insulation for a project, and what stood out straight away was how easy it was to find everything in one place, rather than jumping between different suppliers.

Instead of browsing endless product pages, I usually head straight into the main categories like plasterboard, insulation or aggregates and build the order from there. It’s also helpful that they stock brands most people already know, like Rockwool, Kingspan and Knauf, so you can compare materials without wondering whether the quality will hold up.

From a saving point of view, I’ve found it’s worth planning the basket properly before ordering. Because building materials can get expensive quickly, even small savings make a difference. I always check whether the order is close to the free delivery threshold or whether adding another item makes more sense than paying for delivery separately.

And like with any larger purchase, I’ll check NetVoucherCodes before checking out to see if there’s a Building Materials discount code available. Sometimes that extra saving can cover delivery costs or knock a decent amount off the total when you’re ordering materials in bulk.

Save on delivery

With a retailer like this, delivery can make a big difference to the final cost, so this is one of the first things I’d look at.

• Standard mainland delivery is generally £20 incl VAT on baskets up to £300 ex VAT, then free over £300 ex VAT on standard deliveries.
• The site also promotes free delivery over £750 on the homepage, although exclusions apply.
• Some suppliers have fixed delivery charges regardless of basket value, so it’s worth checking whether your order includes brands like Truline, Siderise, Wedi or others with specific fees.
• If I were close to a free delivery threshold, I’d check whether adding another needed item worked out cheaper than paying the delivery charge separately.

Use a trade account for better long-term value

This is probably the biggest saving route if you buy materials regularly rather than as a one-off.

• Trade accounts come with a dedicated account manager, tailored support and trade credit options.
• They’re designed for repeat buyers and larger projects, which usually means a smoother ordering process.
• The site also mentions access to competitive trade pricing through the trade account setup.
• If you’re ordering for work rather than a one-off home job, this is the first thing I’d sort before placing a big basket.

Ask about tailored delivery

If your order is awkward, bulky or needs to land at a very specific time, it’s worth speaking to them rather than just accepting the default checkout option.

• They can discuss next-day deliveries, specific delivery dates and split deliveries in some cases.
• Their trade account managers are set up to help with custom delivery arrangements.
• This can help avoid delays, missed deliveries or paying twice because materials arrive at the wrong stage of the job.
• It’s not always about saving money upfront - sometimes it’s about avoiding expensive disruption later.

Avoid costly returns by checking product type and terms first

Returns here aren’t as simple as fashion or general retail, so I’d be careful before ordering.

• Unwanted returns within 14 days are subject to a 25% restocking charge.
• Collection starts from £22 and can increase depending on location and product type.
• Powder-based products like cement and plaster can’t be returned if they’re simply no longer needed.
• With building materials, checking quantities and specifications properly first can save a lot more than fixing a mistaken order afterwards.