Knall Discount Code Black Friday 2026 - 50% OFF

Knall is a UK-based online retailer and direct distributor specialising in made-to-measure window coverings and sun protection systems. Its range takes in roller, pleated, Roman, Venetian and wooden blinds, along with external roller shutters and awnings. Because each item is cut to the measurements of the customer's own window, buyers get a fit that matches their size and style, and motorised and smart-home integrated blinds are available for those who want added convenience.

Ordering runs through the store's website, which is built so that shoppers can browse the range, pick a product and set up their measurements without difficulty.

On delivery, Knall ships free once an order goes over £5000. Anything below that threshold carries a standard shipping charge of £29.90, and oversized items attract extra costs. Returns need to reach the store within 7 days and the goods have to be back in their original state. Refunds go to a debit or credit card or to PayPal, generally within 2 working days, and where something is wrong a replacement product is supplied instead. A delivery fee may be charged when the order was worth more than £190.

Shoppers who serve or have served can claim an Armed Forces discount: they register with the Defence Discount Service, note the discount in the comments box as they order, and pay by advance bank transfer. Knall also runs a tiered discount program that scales with the total value of a purchase, offering between 2% and 7%, though it does not use a traditional points system. Window blinds come with a robust warranty, and the company says it will deal with any issues that come up with blinds ordered from it.

Codes go into the discount code box at the Knall checkout; deals need no code.

Knall has official accounts on Facebook, Twitter, YouTube and Instagram.