The Operating System

Windows, Doors
& Façade Projects
finally have
an operating layer.

One platform to quote faster, re-engineer in seconds, and turn transparency into orders — built for the firms that carry the most pressure in the chain.

quote, compare & re-engineer in seconds
get found, get called, get orders

Same problems.
Every firm.

50–200
Engineering hours lost per change cycle
0%
of pre-contract engineering gets paid
400+
products invisible to search engines
3–5 days
average wait before a client gets a price
23%
of deals lost to unclear pricing
01 — The revision trap
"A client swapped one hardware component.
We re-engineered for three weeks."
Before
Change request
cascade begins
Geometry & BOM
re-engineering
Delayed approval
restart
After
Component change
detected
All dependencies
recalculated
Quote updated
same day ✓
Thousands of engineering hours. Lost every year. Most of it uncompensated.
The industry has accepted this as normal. We haven't.
02 — The silent catalog
"We spent years building a catalog.
It lives in a folder on my desktop.
Our competitors get called. We get nothing."
Before
Hundreds of products
invisible
No listings written
not indexed
Zero organic traffic
no calls
After
Product configured
listing generated
Page indexed
you're found ✓
Catalog grows
automatically ✓
Every configured product becomes a searchable page. Catalog grows automatically — with every new system, every project.
Get found. Get called. Get orders.
03 — The friction before yes
"Three emails and five days ago, a client asked for a price.
By the time we sent the quote, we had already lost them — we just didn't know it yet."
Before
Brief received
quote requested
3–5 days wait
back & forth
Spec unclear
price opaque
After
Instant configuration
spec verified
Alternatives compared
prices provided
Proposal generated
sent same day ✓
A complete proposal in hours. With alternatives compared — the client is no longer choosing who to trust. They're choosing which solution fits.
Speed gets you in the room. Alternatives keep you there.
04 — The confidence gap
"Every time a client asks 'what am I paying for?' — we spend an hour explaining what should be self-evident. By then, the doubt is already there."
Before
Client asks
price questioned
No clear answer
hour wasted
Trust eroded
looking elsewhere
After
Options visible
gives control
Price transparent
forms trust
Deal closed
they commit ✓
When buyers can follow how the price is built and what it covers, doubt disappears — and they commit.
Fenestra builds control. Control builds confidence. Confidence closes deals.

From your catalog to closed deals.

01
We set it up
You show us your catalog. We build the logic. Some systems are already inside — you can start quoting from day one.
02
You run your first quote
Pick a system, configure it, get a validated spec, BOM, and price. In minutes — not days.
03
Changes cost seconds, not weeks
A client swaps a component. The platform recalculates every dependency. You send a revised quote the same day.
04
Your catalog starts working for you
The same data becomes indexed product pages — found by the people already searching for what you make.

Built for façade contractors.

The composite role combining design bureau, fabrication, and installation. The firm that carries the highest operational and financial pressure in the chain.

New Construction
Working with architectural bureaus on commercial & residential builds
You receive specifications from the architectural bureau, configure the system, validate against manufacturer rules, and coordinate fabrication and installation. One change from the architect cascades across your entire project. Fenestra contains that cascade.
Replacement & Renovation
Competing for direct orders from clients and developers
The client finds you — or doesn't. In replacement projects, the company with stronger SEO and digital presence wins the order before capability is ever evaluated. Fenestra puts your verified product range in front of the people searching for it.

We're onboarding our first partners now.

We're working with a small number of façade contractors in the premium segment. If the problems on this page sound familiar, we'd like to talk.

We'll reach out within 48 hours. No pitch — a conversation about your situation.
quote, compare & re-engineer in seconds

Stop re-engineering for free.

Configuration engine, automated BOM, validated drawings, and structured handoffs — built around the rules of your system manufacturers, not around generic CAD logic.

Pre-contract engineering is largely uncompensated. Change cycles destroy margins.

Weeks per revision
A single change cascade consumes 50–200 engineering hours. Unplanned. Often uncompensated. Repeated on every project.
$
Unpaid pre-contract
You fund estimates, drawings, and iterations with no contractual protection. The work is real. The invoice isn't.
Manual error risk
Every spec passed via PDF and phone call is an opportunity for a costly site-level mistake. Errors discovered on-site cost ten times what they cost in the engine.
Approvals restart
Structural changes reset the approval clock. Weeks of sign-offs lost with one client revision. No record of why decisions were made.
Tribal knowledge lost
When the senior engineer leaves, so does the knowledge of which profiles behave unexpectedly at certain tolerances. That knowledge should be in the system, not in someone's head.
The pattern is structural
Every firm we spoke to had tried to build internal tooling. Every attempt collapsed under configuration complexity and manufacturer edge cases. The problem is not effort — it's the wrong approach.

Rules-based. Manufacturer-validated. Automatic.

The constraint engine encodes your system manufacturer's rules as a mathematical model. Every configuration is validated before anything leaves the platform.

Inputs
System & profile family
Opening dimensions
Opening type & operation
Glazing specification
Hardware selection
Performance requirements
Constraint Engine
Rules · Dependencies · Validation
Manufacturer Logic · Constraint Checks

One architecture.
Per-catalog adapters.
Validated outputs
Valid component selection
Constraint compliance check
Bill of materials
Auto-generated drawings
Structured handoff package
Change diff & version log

How a project flows today vs. on the platform.

Today
Client requests change via email. Engineer interprets manually.
Geometry recalculated from scratch. Drawing updated by hand.
BOM rebuilt manually. Pricing re-quoted. Lead times re-checked.
Approval process restarts. Weeks of sign-offs lost.
PDF sent to fabrication. Errors discovered on site.
50–200 hours consumed. Most of it uncompensated.
On Fenestra
Change entered into the engine. Constraints re-validated instantly.
Updated BOM and drawings generated automatically.
Pricing and lead times recalculated from validated component data.
Change diff logged. Previous version retained. Approval delta visible.
Structured handoff to fabrication. Errors caught before they leave the platform.
Hours compressed. Pre-contract work has documented value.

Join the pilot programme.

We're onboarding a small number of façade contractors in the premium segment. Complex, multi-revision projects preferred — we want to build this with people who feel the problem acutely.

US and EU markets currently. Other markets by arrangement.
get found, get called, get orders

The company with better SEO wins the order.

In replacement and renovation projects, clients decide who to call before they've ever seen your work. We put your verified product range in front of them — at scale, accurately, automatically.

You have the capability. They can't find you.

In a replacement project, the client searches online. They find three companies. The one with the clearest product pages, the most specific technical information, and the strongest search presence wins the first call. Capability is evaluated second — if at all.

Most façade contractors have excellent product ranges and almost no digital presence. The gap is not skill — it's structured product data online, at scale, that search engines can read and clients can trust.

The replacement order funnel
1. Client searches "aluminium window replacement [city]"
2. Finds 3 companies with clear product pages & specs
3. Calls the first one. The others never knew there was an opportunity.

Thousands of verified listings.
Accurate by default.

Every listing is generated from validated catalog data — not copywriting. Technically accurate, search-optimised, and updated when manufacturer specs change.

yourcompany.com/products/aluminium-tilt-turn-window-schuco-aws-75
✓ Manufacturer validated
Aluminium Tilt-Turn Window — Schüco AWS 75.SI
System: Schüco AWS 75.SI Profile depth: 75mm Thermal class: Uf 1.3 W/(m²K) Updated: Jan 2026
Max width
1,500 mm
Max height
2,400 mm
Glazing
Up to 54mm
Air class
Class 4
High-performance aluminium tilt-turn window based on the Schüco AWS 75.SI system. Suitable for residential and commercial applications. Available in all RAL colours and anodised finishes. Configured, validated, and supplied by [Your Company] — certified installer and fabricator for Schüco systems in [Region]. All specifications are validated against current Schüco manufacturer rules.

Everything your digital presence needs.

📄
SEO Product Listings
Thousands of validated product pages generated from your system manufacturer catalogs. Every page is technically accurate, structured for search, and linked to your contact flow.
🏪
Online Store & Showroom
A product catalogue your clients can browse — filtered by system, dimension range, thermal class, and application. Turns your capability into a browsable digital presence.
🎯
Banner & Campaign Automation
Marketing materials generated from your product data. System-specific campaign assets for social and digital, updated automatically when your range or pricing changes.
🔍
Marketplace Visibility
Your products listed on the Fenestra marketplace — a unified search layer where developers, architects, and clients search for window, door, and façade solutions by system and specification.
📊
Market Analytics
Which products are searched for most in your market. Which specifications clients request most often. Where your competitors are visible and you aren't. Proprietary data from the platform.
🔄
Always Accurate
Listings update when manufacturer specs change. No manual maintenance. No outdated information on your product pages. The catalog is the source of truth — and it's validated.

Get your products found.

We're working with our first façade contractor partners on listing generation and SEO. Short onboarding, fast results, no long-term commitment required to start.

First partners in the premium segment. US and EU markets.
For System Manufacturers

Your catalog is where
your products get specified.

Façade contractors on the Fenestra platform configure from your catalog. Every project that runs through the engine is a validated specification that traces back to your system.

How catalog presence on the platform works.

Your products get configured — correctly
The engine encodes your constraint rules, tolerance limits, and component dependencies. Every configuration using your system is validated against your actual specifications — not approximations.
Demand aggregation
As more façade contractors join the platform, the volume of projects configured against your catalog grows. That aggregated demand creates commercial leverage — and visibility into where your products are being specified.
Certified catalog status
Certified catalogs are verified, current, and trusted by façade contractors on the platform. Certification signals quality and completeness — and ensures your products are the ones being ordered.
Structured order flow
As the platform moves into ordering and payment orchestration, your catalog is the source of the order data. Validated configurations become structured purchase orders — reducing errors, returns, and specification disputes.

Three steps to certified status.

1
Share your catalog data
Provide your system specifications, component catalog, constraint rules, and tolerance tables. We handle the encoding — you don't need to change your existing formats.
2
Validation & certification
We encode your rules into the constraint engine and run validation against your test cases. You review and sign off. Certified catalogs are flagged on the platform as manufacturer-verified.
3
Live on the platform
Façade contractors configure from your catalog. Orders trace to your system. You receive visibility into specification volume, regional demand, and ordering patterns.

Get your catalog certified.

We're encoding our first priority catalogs now, focused on the premium segment. If you're a system manufacturer with a presence in the European or North American market, we'd like to talk.

About Fenestra

Built by people who watched the problem up close.

The founding insight came from five years of watching how metal window and façade engineering actually works — and what breaks every time.

"A client swapped one hardware component. We re-engineered for three weeks."

That was the moment. Five years working inside a metal window and façade engineering bureau — watching the same cascade happen on every project. One change from a client. Five things break. Weeks of uncompensated re-engineering. Everyone absorbs it silently because it's been normal for so long.

The problem isn't effort. Every firm we spoke to had tried to build internal tooling. Every attempt collapsed under configuration complexity and manufacturer edge cases. It's the wrong approach — because it's a rules problem, not a CAD problem.

We formalised the rules. Built the constraint engine. Proved the dependency structure is consistent across manufacturers. That's the architectural proof that makes Fenestra possible.

01
One leading system manufacturer encoded end-to-end — rules, constraints, component dependencies.
02
Cross-manufacturer validation confirmed: the dependency logic repeats. This is the key architectural proof.
03
One architecture, per-catalog adapters. The 10th catalog costs a fraction of the first. The moat widens automatically.

Principles we build by.

Accuracy before speed
Validation is a blocking gate — not a warning. No BOM or drawing leaves the platform without full constraint compliance. Errors surface in the engine, not on-site.
Infrastructure, not features
We're building the layer everything else runs on. That means being honest about what we are — an operating system, not a productivity tool. The difference is in the architecture.
Honesty about where we are
We're early. We know what we've proven and what we haven't. We'd rather build with partners who understand that than sell a product that overpromises.

United States & European Union.

United States

Premium commercial and high-end residential market. Architectural bureaus with demanding specification requirements. Strong willingness-to-pay for tools that reduce re-engineering cost.

European Union

Identical pain, different procurement culture and regulatory environment. Strong presence of European system manufacturers. First pilots determine where commercial pull is stronger.

Building with early partners.

We're not looking for customers. We're looking for partners who feel the problem acutely and want to build the solution together.

Early access

We're onboarding our first partners now.

A small number of façade contractors in the premium segment. We'll reach out within 48 hours — not to pitch, but to understand your situation and confirm fit.

48-hour response. A real conversation, not an automated sequence.
No commitment required. We want to understand your workflow before proposing anything.
Both available. Workflow tool, pipeline growth, or both — tell us what's most urgent.
Premium segment only for now. US and EU markets. Other markets by arrangement.
Join the waitlist
Five fields. We read every submission personally and reply within 48 hours.
Your information is used only to contact you about the waitlist. No spam, no sharing.
You're on the list.
We'll be in touch within 48 hours. In the meantime, if you have questions or want to share more about your situation, you can reply directly to our confirmation email.

Thank you for your interest in Fenestra.