How it works
THE GAP ISN"T IN THE FABRIC. IT'S AROUND IT.
BLOCKER is a made-to-measure blackout system built around your whole opening — fabric, edges and fit together. This page is the six-step route from your window to a genuinely dark room.
FIG. 01 — Opaque fabric blocks light through the material. It doesn't block the gap the blind sits inside.
Recess-mounted standard blackout blind, side view
Fig. 02 — See the difference
SAME WINDOW. TWO DIFFERENT EDGES.
Standard blackout blinds are built to stop light through the fabric. BLOCKER is built to stop it at the edge, top and bottom too.
Fabric blocks the middle. The gap around every edge lets light straight through, especially once eyes adjust to the dark.
A continuous seal runs around the whole perimeter — fabric, sides, top and bottom act as one fitted system.
The journey
FROM WINDOW TO DARK ROOM, IN SIX STEPS.
Each node below does one job. Follow any link for the full detail on that step.
01
Measure your window
Two numbers, in millimetres — width and drop, each measured three times. Get those right and everything downstream fits.
Open the measuring guide →
VIDEO — tape across the recess
02
Choose your build
Set your size, pick a mounting style, and add the edge seal for a tighter fit if your window needs it.
Check your window type →
IMAGE — fabric & finish swatches
03
We build it to your numbers
Every BLOCKER is cut and assembled from the dimensions you enter for that specific opening — not a stock size rounded down.
See how the system works →
IMAGE — workshop / production
04
Delivered to your door
Tracked delivery, boxed for the room it's going in — lead time starts once your measurements are confirmed.
Delivery & returns →
IMAGE — boxed blind, doorstep
05
You fit it
A guided fit, using the instructions supplied in the box for the hardware in your specific order.
Read the installation guide →
VIDEO — fitting the seal
06
Total blackout, on your terms
Full control over daylight whenever you want it — backed by a two-year warranty on the whole build.
See the warranty →
IMAGE — finished dark room
Fig. 04 — Reference
EVERY STEP ABOVE, EXPLAINED PROPERLY.
GUIDE
How To Measure
The full width & drop method, with diagrams.
GUIDE
Window Types
Which recesses and frames BLOCKER suits.
TECHNOLOGY
The BLOCKER System
Fabric, edges and fit — the engineering.
GUIDE
Installation Guide
What fitting day actually involves.
ASSURANCE
Two-Year Warranty
What's covered, and for how long.
Fig. 10 — In the room
WHEREVER DAYLIGHT ISN'T WELCOME.
Nursery
Shift worker
Home cinema
Guest room
Before you start measuring
THREE QUESTIONS PEOPLE ASK FIRST.
Will this fit my window?
Most recessed windows work. The clearest way to check is the Window Types guide, which covers the recess shapes and depths BLOCKER is built for.
How long does it take?
Your blind is made to order once your measurements are confirmed, so lead time starts from there rather than from when you place the order. Current dispatch times are on the Delivery & Returns page.
What if my measurements are slightly off?
The edge seal is designed to take up small irregularities between the frame and the recess. It isn't a substitute for measuring carefully, though — which is exactly why the measuring guide walks through it point by point.
Ready when you are
START WITH YOUR MEASUREMENTS.
Everything above starts from the same two numbers. Get those right, and the rest of this page is just what happens next.
BLOCKER MODEL ALPHA™ · FROM £200 · 2-YEAR WARRANTY