BKSAI Upgrade Blackout Blind Material Review

The BKSAI Upgrade Blackout Blind is a wrinkle-free linen-material fabric designed to be custom-cut for any window. Eschewing the traditional 'plastic feel' of cheap blackout liners, it uses a hook-and-loop (Velcro) fastening system for a drill-free installation. Primarily marketed for light blocking, the material's density also offers a secondary benefit as a thermal barrier, helping to keep rooms cooler in summer and partially retaining heat during UK winters.

In a practical setting, the 'no-drill' hook-and-loop tape makes this excellent for renters or for oddly shaped UK windows where standard blinds won't fit. The linen-blend material feels more robust than PVC alternatives and doesn't crinkle loudly in a breeze. However, users should be meticulous about cleaning the window frame before applying the adhesive, as temperature fluctuations in typical UK weather can cause the tape to peel if the surface wasn't perfectly prepped.

The energy savings here are passive and modest. By reflecting solar radiation in summer and providing an extra thin layer of insulation against single or older double glazing in winter, users could see a minor reduction in cooling or heating needs. In a typical UK semi-detached home, using this to cover a large, draughty north-facing window might save a negligible amount on annual bills (cautiously estimated at £5–£15), but the primary gain is thermal comfort rather than significant financial ROI.

Installation is straightforward: measure the window, cut the fabric with sharp scissors, and apply the self-adhesive hook-and-loop strips to the frame. No tools are required other than measuring tape.

Zero. Aside from the initial purchase price of £14.44, there are no ongoing costs. Replacement adhesive tape may be needed after a few seasons of removal and reattachment.