Installing roller shades yourself takes about 20 minutes per window if you're organized. This is the exact process we teach new installers — including the two mistakes that cause 90% of DIY callbacks. What you need before you start Cordless drill with a 2 Phillips bit 3 mm masonry bit if mounting into concrete or brick reveals Pencil, tape measure, and a small level (or a level app) Painter's tape (for marking without pencil marks on paint) Safety glasses — drywall dust in the eyes ruins the day Step 1 — Decide inside-mount or outside-mount Inside mount sits inside the window frame reveal.
Cleaner look, but the reveal needs to be at least 40 mm deep for a standard roller cassette, and 60 mm for a cassette with side channels. Measure with a ruler before you order. Outside mount sits above the frame on the wall. Better for shallow reveals, uneven windows, and rooms where you want maximum light blockage — an outside-mounted blackout roller with 50 mm wall overlap kills 99% of light bleed. Standard choice for bedrooms. Step 2 — Mark the brackets, precisely Roller shade brackets are asymmetric: one has a fixed pin, one has a spring-loaded pin.
Set the shade next to the window so you can see which end is which before you drill. Nothing more annoying than realizing the chain is on the wrong side after you've committed screws. For inside mounts, position the brackets 10 mm back from the front of the reveal. This gives the fabric room to unfurl without brushing the sill. For outside mounts, set the brackets so the shade covers the full frame plus 40 mm on each side and 100 mm above. Bigger is better for light control. Step 3 — Level the brackets This is where 90% of DIY installs go wrong.
A 3 mm out-of-level bracket set will show as a visible fabric tilt when the shade is down. Set the first bracket, hold a level across the top of both brackets, and mark the second position off the level — not off the window frame, which is usually not level in older Halifax and Charlottetown homes. Step 4 — Drill and mount Into wood frame: pilot with a 3 mm bit, screw directly. Into drywall: use the plastic anchors that came with the shade (throw out the anchors if they're the cheap yellow ones — buy proper ribbed anchors instead).
Into concrete or brick: hammer-drill a 6 mm hole, insert plastic sleeve, then screw. Step 5 — Snap the shade in Slide the fixed pin end into its bracket first, then push the spring-loaded end up and click it into the second bracket. It should sit flat and rotate freely. If it grinds, the brackets are too close — loosen and shim outward by 1–2 mm. Step 6 — Set the chain safety and length This is a legal requirement in Canada as of May 2022. Every corded blind must have a P-clip or tension device mounted to the wall or window frame that keeps the chain taut and out of reach of children.
The clip ships in the box; install it 1.5 metres above the floor, minimum. Step 7 — Test the roll Pull the chain to lower and raise the shade three full cycles. The fabric should track straight without walking left or right. If it walks, one bracket is slightly higher than the other — loosen the low bracket and add a cardboard shim. The two mistakes that cause callbacks Skipping the level check. Trusting the window frame instead of a proper level. Result: visibly tilted shades. Overtightening bracket screws into drywall. Strips the anchor, the bracket wobbles within a week.
Snug is enough — you should feel the anchor grip, then stop. When to call a pro Windows wider than 2 metres — the shade weight requires reinforced mounting Motorized shades with hardwired power Any window above a stairwell — safety, not skill Historic homes with plaster walls (need to find the lath) Related reading Roller vs zebra shades — which to install Order roller shades How to measure your windows accurately