This Is More Than a Window Installation. It’s Assurance, Engineered.
For discerning homeowners, hesitation around window replacement is rarely about cost.
It stems from something more consequential: the risk of uncertainty after commitment.
Unexpected delays. Site disruption. Incomplete finishes. Or worse, non-compliant work that fails to satisfy planning regulations such as Part L.
The real concern isn’t the payment.
It’s the possibility of regret.
At Sash Windows London, we understand that. That’s why our Aluclad installations are not positioned as “just another home improvement” — but as a precision-engineered intervention, meticulously planned to elevate performance, preserve aesthetics, and eliminate operational friction.
Every stage — from the initial scheduling to the final polish — is executed with the singular goal of protecting your property, your time, and your peace of mind.
What follows is a definitive breakdown of what to expect during a two-day Aluclad installation — delivered without disruption, excuses, or surprises.
Let’s begin.
Before We Even Arrive, We’re Already 90% Done
An installation is only as smooth as the planning behind it — and by the time we show up on Day 1, everything has already been locked, spec’d, surveyed, and coordinated to the millimetre.
There are no guesswork moments. No, “we’ll have to come back for that bracket.”
Every single part of the install has already passed through our internal pre-deployment checklist — the same standard used for listed properties, PassiveHaus projects, and luxury London townhouses alike.
Here’s what happens before your doorbell ever rings:
- Your bespoke specification is finalised and verified. That means every finish, hinge, sill depth, and thermal rating is signed off and factory-approved.
- Our certified surveyors have already laser-mapped your apertures. We’re not eyeballing. We’re precision-planning.
- You receive a Day 0 SMS, giving you an exact ETA for the crew’s arrival, lead installer contact details, and a short checklist (secure pets, clear curtains, etc.).
- Every team member arriving is briefed on your installation. No freelancers. No one is reading your file for the first time in your driveway.
And just to be clear — if your property is within a conservation zone or listed under English Heritage protocols, we’ve already accounted for that too.
We’re not just fitting windows. We’re fitting them legally, cleanly, and beautifully into your specific context.
By the time the van pulls up at 08:00 on Day 1, the only question left is:
“Tea or coffee while we work?”
Day 1 – Structural Transformation Without the Chaos
By 08:00, the install team is on-site — in uniform, fully briefed, and already walking the property with a sense of purpose.
This isn’t a construction scene.
It’s a controlled, surgical environment.
You’ll see protective dust sheets laid over flooring and furniture, sash bays prepped with care, and tools unloaded with a deliberate rhythm. There are no loud radios. No chaotic chatter. Just quiet precision.
By Mid-Morning: The Old Is Gone — Without the Mess
Forget crowbars, cracked plaster, or chunks of brick.
Your old windows are carefully deconstructed, not smashed out.
Each frame is removed in a sequence that preserves your reveals, protects your sills, and avoids unnecessary damage to surrounding finishes — whether they’re lime plaster, heritage mouldings, or contemporary render.
Everything removed is bagged, sealed, and taken off-site. No skip. No trail of debris. Just clean apertures, ready for something better.
By Midday: Your New Frames Are In
Your aluclad frames — already fabricated to bespoke dimensions — are laser-aligned, fixed, sealed, and precision-set.
These aren’t timber frames with cladding taped on. They’re engineered hybrid systems, marrying solid timber warmth on the inside with robust aluminium weatherproofing on the exterior — the best of both worlds, thermally and aesthetically.
We don’t just “fit.”
We anchor, align, insulate, and seal using expansion foam, warm-edge spacers, and millimetre-accurate tooling.
By 16:00: Walkthrough and Clean Sign-Off
You’ll walk the property with the lead installer.
Each window is demonstrated — smooth opening, sash glide, secure locking, and acoustic seal integrity. Friction hinges are tuned. Sightlines are checked. Notes are logged.
Then? We clean. Thoroughly.
You won’t be left with handprints on glass, sawdust on the floor, or masking tape on the wall. Just quiet, beautiful windows that already feel like they’ve always belonged.
No delays. No reschedules. No surprises.
Just Day 1 — executed exactly as promised.
Day 2 – Polish, Test, Prove
Where other installs stall, we accelerate. Day 2 isn’t for catching up — it’s for finishing strong. This is where our promise becomes visible, audible, and measurable.
By now, your frames are already in. But we’re not done until every seal is perfect, every handle secure, and every performance metric has been proven in real time.
Exterior Sealing: Weatherproofed to Last
Our installers apply colour-matched, UV-stable sealants to the external joins. Not rushed. Not smeared. Smoothed with precision, fully bonded, built to last.
This isn’t caulk from a tube. It’s a finish that blends seamlessly into your façade — whether brick, render, or stone — and resists London’s winter rains for decades.
Locking, Movement & Security: Tuned to Perfection
Each sash or casement is calibrated by hand.
- Multi-point locks? Set and tested.
- Hinges? Adjusted for tension and alignment.
- Friction stays? Tuned to your preference — soft-close or firm-hold.
- Handles? Secure, symmetrical, silent.
And yes, every install passes Part Q security standards. That’s not an option. That’s the baseline.
Performance Scanning: Proof, Not Promises
We don’t just tell you your home is warmer.
We show you — live.
Our technicians perform an IR thermal scan across newly installed glazing. You’ll see the surface temperature delta, side-by-side with old glass, if applicable. The difference? Often, more than 30% improved heat retention.
This is what Passive-ready performance looks like in the real world. No guesswork. No theory. Just clear thermal evidence.
Final Finishing: The Detail No One Talks About
We remove all protective films, buff the glass, polish the frames, wipe down hardware, and clean the room again.
We even wax the timber interiors if you’ve opted for exposed finishes — restoring that satin glow, ready for your next glass of wine.
By the end of Day 2, what started as an “install” now feels like an upgrade to your lifestyle — warmer, quieter, cleaner, stronger, better.
And it’s only just begun.
We Don’t Just Leave. We Certify.
For most installers, completion means leaving a few leaflets on the windowsill and backing quietly out the door.
For us, that’s when the most important part begins — the handover.
Because in a premium install, it’s not just what you received.
It’s what you’re protected by.
Your 10-Year Warranty Pack — In Writing, Not Promises
You’ll receive a full installation dossier:
- Product-specific guarantees (frame, finish, glass)
- Details of compliance with Part L (thermal), Part Q (security), and Part K (glazing safety)
- Certificates tied to your unique serialised install
- A copy of the original CAD-approved survey spec for your records
This isn’t fluff. It’s paperwork that protects resale value, planning status, and future compliance.
Aftercare Kit: Luxury That Maintains Like It Should
Inside your kit:
- Microfibre cloth for residue-free cleaning
- Matching touch-up wax or finish oil (if exposed timber)
- Hinge lubricant + locking mechanism guide
- Printed maintenance checklist (2-minute annual scan)
In most cases, you won’t need to touch your windows for decades. But when you do, we’ve prepared you.
Post-Install Support: You Still Have Access
Should you ever need guidance, clarification, or additional work, we’re not disappearing. You have:
- A direct number for our install coordinator
- Access to our post-install support inbox
- Optional reminder service for 12-month check-in
And if you’re in a heritage or planning-sensitive property, we’ll even pre-fill compliance docs for you, ready for submission.
This Isn’t a Goodbye. It’s a Legacy Hand-Off.
You’ve just completed a structural, thermal, and aesthetic transformation — without a single moment of uncertainty.
Your home is now:
- Warmer
- Quieter
- More secure
- Regulation-proof
- And built to last for generations
We don’t just install windows.
We deliver peace of mind, backed in writing.
Why This Isn’t Just “Better Timber” — It’s Material Mastery
Let’s clear something up.
This isn’t “nice timber with a bit of metal on top.”
It’s not “a luxury version of what you already had.”
And it’s definitely not another compromise between beauty and performance.
What you’ve chosen is a window system built at the intersection of material science, regulatory foresight, and architectural precision.
Here’s why that matters — and why you’ll feel it every time you walk past your windows.
The Timber Core: Where Warmth and Structure Begin
At the heart of every Aluclad frame is sustainably sourced hardwood or engineered timber, CNC-milled to exact dimensions.
- Structurally stable, warp-resistant, and engineered for tight tolerances
- Provides the visual warmth, depth, and texture that modern finishes can’t replicate
- Fully treated against rot, fungi, and environmental decay
- Available in natural clear coatings or heritage paint systems for listed aesthetics
This isn’t exposed to the elements — it’s protected, sealed, and secured behind the one thing British weather can’t ruin…
The Aluminium Cladding: Form Follows Function (and Then Some)
Our exterior-facing aluminium isn’t cosmetic. It’s architectural-grade protection.
- Powder-coated in any RAL or custom shade — from muted heritage tones to bold architectural blacks
- Fully vented and pressure-equalised to prevent condensation
- Engineered to lock into timber with hidden fasteners — no visible screws, no water ingress
- Weather, UV, and impact resistant for decades of maintenance-free performance
No rot. No repainting. No warping. Just crisp edges, flawless joins, and colourfast beauty.
Thermal Performance: Passive Isn’t Optional Anymore
Your windows don’t just meet building regulations — they outperform them.
- Low U-value glazing (triple or high-performance double, depending on spec)
- Warm-edge spacers to reduce perimeter heat loss
- Argon or Krypton-filled units for maximum insulation
- Thermally broken frames to stop cold bridging across timber and metal junctions
Combined, these systems can bring your home within PassiveHaus performance thresholds — without sacrificing looks or planning integrity.
Security Without Compromise: Silent Strength, Built In
- Multi-point locking mechanisms with internal steel reinforcement
- All locking hardware conforms to PAS24 / Part Q
- Glazing options include laminated security glass for high-risk properties
- Optional restrictors, egress hinges, and acoustic enhancements are available
The frame may feel smooth in your hand, but it’s engineered like a vault.
Detail-Level Design That Architects Obsess Over
- Equal sightlines for harmony across elevations
- Slimline profiles that preserve daylight ingress without chunky framing
- Hidden drainage and fixings — nothing interrupts the silhouette
- Can be paired with integrated sash horns, glazing bars, or heritage venting options
This is what happens when craftsmanship meets compliance, and design meets durability — not a product that fits in, but one that elevates the entire façade.
You didn’t just “upgrade your windows.”
You stepped into a class of build quality most homeowners will never see, let alone experience.
This is what material mastery looks like.
No Dust. No Delays. No Drama.
By now, your home has changed — not just in structure or performance, but in how it feels to live in.
There’s a moment we hear about often.
It comes the night after we leave.
It’s quieter.
The cold spots are gone.
There’s no sawdust in the corners. No paint scuffs. No sense of “the builders were here.”
Just a strange, comforting realisation:
“I expected disruption. But all I got was calm.”
The Absence of Chaos Is Intentional
We don’t deliver “neat for builders.” We deliver invisible excellence.
That means:
- No tools left lying around.
- No excuses to return for missing parts.
- No, “we’ll be back next week to finish up.”
- No bags of waste in the front garden.
The install is done. The mess is gone. Your rooms are cleaner than when we arrived.
It’s not luck. It’s our standard.
Quiet Isn’t Just a Feature — It’s the Atmosphere
The difference is more than thermal.
High-performance glazing and seals reduce external noise transmission by up to 80%.
No more wind whistling. No more street hum. No more echoes bouncing off cold glass.
It’s the kind of silence that makes the rest of the home feel more spacious, like your rooms can breathe again.
Emotional ROI: The Investment That Changes Your Everyday
Think about it:
- You no longer worry about moisture, rot, or warping.
- You’re no longer adjusting the heating just to make a room bearable.
- You’re not explaining to guests why the back window doesn’t lock properly.
Instead, you’re looking through perfectly fitted glazing, framed in materials you trust, and watching the seasons stay outside — where they belong.
The job’s done. The difference is real.
And you didn’t have to chase a single installer to get it.
That’s not just a window upgrade.
That’s what peace of mind looks like, sealed in glass, timber, and aluminium.
Find Out What Your Home Needs (Or Doesn’t)
You’ve now seen what a 2-day Aluclad install looks like — not in theory, but in real, lived experience.
No delays. No callbacks. No gaps between promise and execution.
Just precise, elegant work that raises the thermal, acoustic, and emotional value of your home, permanently.
And maybe you’re wondering…
- “Do I really need Aluclad?”
- “Would it work with my heritage property?”
- “Will it pass planning?”
- “Is the performance boost worth the upgrade?”
Here’s the truth:
Not every home needs what we do.
But every discerning homeowner deserves to know where they stand.
That’s why we offer a 15-minute Elevation Call — not a sales pitch, not a showroom push — but a straight, professional opinion on what your home actually needs.
You’ll get:
- A professional take on your current windows
- Insights into heat loss, U-values, and security gaps
- A clear yes/no on whether Aluclad is right for your project
- Answers to planning, compliance, or design integration concerns
No jargon. No pressure. Just clarity.
Book Your 15-Min Elevation Call
Clarity is the new luxury — and we deliver it before we ever pick up a tool.
👉 Book Now
👉 View Real Installations
👉 Compare Aluclad vs Timber
Your home deserves windows that match its quality.
Let’s find out if this is the upgrade that makes everything else make sense.
