If you’ve ever tried to buy new windows, doors, or even something like a kitchen worktop, you’ve probably heard two phrases tossed around: supply only and supply & fit.
Truth be told, most people nod along like they understand them perfectly… but behind the scenes they’re thinking, “Wait, which one do I actually need?”
Don’t worry — you’re not alone. Even customers I’ve worked with for years still ask, “Which option saves me more money?” or “Is supply only risky?” So, let’s break it down in plain English.
What “Supply Only” Really Means
“Supply only” is exactly what it sounds like: you buy the product — say a window, door, or glazed unit — and that’s it. The company supplies it to you, and the rest is up to you.
Most people choose this when:
- They already have a fitter they trust
- They’re trying to save money
- They’re doing a renovation at their own pace
- They’re confident with measurements and installation planning
You’ll notice one thing straight away: supply only is cheaper upfront. No labour costs, no scheduling installers, no big fuss.
But — and here’s the bit that catches people off guard — you take on the responsibility.
If the measurements are slightly off, or the installation goes wonky, or your fitter doesn’t follow the manufacturer’s recommendations… well, that’s where things can get messy.
In my experience, supply only works best for people who either know what they’re doing or have a solid tradesperson on standby.
What About “Supply & Fit”?
Now, supply & fit is more of the “leave it to the professionals” option. The company supplies the product and installs it properly.
This usually includes:
- Site survey
- Accurate measurements
- Professional fitting
- Warranty or guarantee on both product and installation
- Less stress (honestly, this is the biggest perk)
On the other hand, it does cost more. Labour isn’t cheap, especially when you’re dealing with skilled trades like glazing, carpentry, joinery, or door installation.
But here’s the thing most people find: the peace of mind is worth the extra cost.
If anything goes wrong — which is rare, but it happens — the installer is responsible for fixing it. No finger-pointing, no guessing who’s at fault.
And speaking from experience, a poorly installed product can cause more headaches than a cheap price can fix.
So… Which One Should You Choose?
Honestly? It depends.
Here’s a quick way to figure it out:
Choose Supply Only if:
- You’ve got a fitter you trust
- You’re comfortable managing part of the project
- You’re confident in your measurements
- You want the lowest upfront cost
- You’re doing a DIY-style renovation
Choose Supply & Fit if:
- You want everything done properly by one company
- You don’t want to deal with multiple trades
- You want full warranty cover
- You’re worried about mistakes
- You care about long-term value more than the absolute lowest price
Most homeowners, once they think it through, lean toward supply & fit because it’s simpler and safer. But there’s absolutely nothing wrong with supply only — especially for builders, landlords, repeat renovators, or anyone who’s done this rodeo before.
A Few Real-World Thoughts
Sometimes customers come to me wanting the cheapest deal possible, and they start with “supply only.” After a couple of measuring questions, you can see the hesitation creep in. That’s when I tell them, “Look, if you’re not 100% sure, it might cost you more later.”
At other times, someone walks in with their fitter’s measurements, knows exactly what profile they want, and knows the fitting date — and for them, supply-only is perfect.
There isn’t a one-size-fits-all answer. The “best” option is the one that gives you confidence, not stress.
Final Takeaway (if you’ve read this far)
Whether you go for supply only or supply & fit, don’t just chase the price. Think about your comfort level, who’s responsible for what, and how smoothly you want the job to go.
Most people don’t remember what they saved —
but they always remember the headache they had to deal with.
And honestly… avoiding headaches is half the reason people hire trades in the first place.