What they are, how they work, and why they're the first thing most new-build buyers ask us about.
Published July 2026
If you've just picked up the keys to a new-build home anywhere from Winchburgh to Heartlands, there's a good chance the first thing you noticed about your windows — other than how clean they are — is that drilling into them feels like a bad idea. It usually is. Most new-build UPVC windows are still under a developer or manufacturer warranty, and that warranty typically doesn't cover damage from screws or fixings put through the frame by someone other than the original installer.
That's the exact problem Perfect Fit was designed to solve. Rather than fixing to the frame at all, the blind sits inside a slim frame of its own, which clips onto discreet brackets that slide into the rubber beading around the glass unit. Nothing is drilled, nothing is screwed, and nothing is glued. The window opens and closes exactly as it did before the blind went in.
At a free home visit, we measure each window or door individually — new-build window sizes vary more than people expect, even within the same house type on the same development. The blind itself (roller, pleated, venetian or wooden) is built into its own frame, and small brackets are fitted into the bead that holds the glass in place. The framed blind then clicks onto those brackets, sitting flush against the window rather than mounted in front of it.
Because the fixing point is the glass unit rather than the frame, doors and tilt-and-turn windows keep working exactly as they should. French doors swing open without the blind flapping, and top-hung windows still vent freely with the blind in place.
This is usually the actual question behind "can I put blinds up yet" — and the honest answer is that drilling into a new-build UPVC frame is one of the more common ways people unknowingly create a warranty dispute later on. Perfect Fit sidesteps the issue entirely, since there's nothing put through the frame for a developer or window manufacturer to point to. It's the reason it's become close to a default choice on new-build estates rather than just one option among several.
Every Perfect Fit blind we fit meets BS EN 13120, the UK standard covering internal blinds in any home where children up to 42 months old might be present — which in practice means every home. Venetian and wooden Perfect Fit systems are operated by a wand, so there's no dangling cord at all. Where a roller or pleated blind does use a chain or cord, it comes fitted with the required tensioner or cleat as standard, keeping it secured out of reach rather than left loose.
The Perfect Fit frame itself is the same no-drill system regardless of which blind sits inside it, so the choice really comes down to the room:
Where site access allows, we try to measure before you've even collected your keys, so the blinds are made and ready to fit around your actual move-in day rather than weeks of bare windows afterwards. It's one of the reasons we built a dedicated New Build Homes service — timing matters more on a new-build than almost anywhere else, since you're usually juggling a dozen other things in the same fortnight.
Perfect Fit blinds clip onto the glass bead rather than the frame, so there's no drilling, no warranty risk, and no disruption to how your windows and doors operate. Every style — roller, venetian, wooden or pleated — is available within the same no-drill frame, and every one we fit meets current child safety standards as a matter of course.
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