An Honest Buyer's Guide
Before you buy any plastic, vinyl, or no-drill shutter, read this.
Plastic Shutters: What You Actually Need to Know
Four common problems with the cheap end of the shutter market, and where good plastic shutters genuinely work.
If you've been shopping for shutters online, you'll have noticed the cheap end of the market is dominated by plastic. PVC. Vinyl. "Faux wood." Perfect Fit®. The pitch is consistent: same look as proper shutters, fraction of the price, no fitter needed.
It's a tempting story. Some of it is even true. But the phrase "plastic shutter" covers a huge range of products of vastly different quality. A high-grade ABS shutter from a reputable manufacturer behaves nothing like a cheap hollow vinyl shutter shipped in from an anonymous overseas factory. They can look almost identical in the Design Studio. They behave nothing alike two summers in.
In this guide we set out the four most common problems we see with cheap plastic shutters, with deeper articles on each. Then we explain where good plastic shutters genuinely work, and why we still sell two ABS ranges ourselves.
We're not anti-plastic. We're anti-cheap-plastic. The difference matters.
Problem 1 of 4
Heat warping on south-facing windows
Cheap vinyl louvres are extruded from soft, flexible PVC with a low heat-deflection point. Combined with the fact that a louvre is unsupported in the middle, sun-facing installations can develop a permanent bow within a couple of summers. The louvres droop. The panels go soft. You can't undo it.
Good ABS shutters, manufactured from a fundamentally different polymer family (same plastic used for Lego bricks and motorcycle helmets), don't have this problem. The trick is knowing which is which before you sign.
Read the article: how to spot warping-prone shutters before you buy →Problem 2 of 4
The hidden risks of Perfect Fit® shutters
Perfect Fit® shutters (sometimes branded "no-drill" or "click-fit") clip directly onto brackets wedged between the glass and your uPVC window's rubber gasket. Three problems with that: your double-glazing warranty may not survive it, cleaning the glass becomes a chore, and the heat trapped between the shutter and the glass can crack the inner pane on a sunny day.
There are situations where the system makes sense (rental properties, north-facing utility windows). On a south-facing bay window with new glazing under warranty, it's a bad idea.
Read the article: three warnings before you buy Perfect Fit® →Problem 3 of 4
When "waterproof" shutters aren't actually waterproof
Almost every plastic shutter sold online is marketed as "waterproof" or "fully water-resistant." There's a meaningful difference between a material that doesn't absorb water and a finished product that keeps water out. Cheap vinyl shutter panels are typically hollow extrusions joined at the corners, and humid bathroom air finds its way into the chambers. Once inside, it condenses, sits, and feeds the microbes that degrade plasticised PVC.
The first sign tends to be a faintly musty smell on warm days. By the time anyone connects the smell to the shutters, there's no practical fix.
Read the article: how "waterproof" plastic shutters can develop hidden mould →Problem 4 of 4
The chemistry no one wants to talk about
Cheap PVC shutters contain plasticisers, typically phthalates, to make the otherwise-brittle PVC workable. UK REACH regulations restrict four of these phthalates to a maximum of 0.1% by weight in articles, but enforcement is uneven on imported consumer products. And peer-reviewed research shows that as PVC heats up (and a sun-facing shutter behind glass gets hot), these compounds release into the air at increasing rates.
This is the topic the cheap end of the trade doesn't want to discuss. We think you should know.
Read the article: what heated PVC shutters may be releasing into your home →The Other Side of the Story
Where good plastic shutters genuinely work
Not all plastic shutters fall into the categories above. The shutter trade also produces high-grade ABS shutters, manufactured from a completely different polymer to PVC, that are properly engineered for humid environments and dimensionally stable in direct sun. We sell two such ranges ourselves: Java (from S:Craft, 100% ABS, fully moisture-resistant) and Hollywood (from Custom West via Luxaflex).
In our installation history across central Scotland, we have no record of heat-warping, moisture failure, or thermal-stress issues on either range. They're properly engineered, properly fitted, and properly warrantied. They cost more than the cheap stuff. There's a reason.
If you'd like to see how the materials compare in detail, with prices, durability comparisons, and which range suits which room, our materials guide is the right next page.
Talk to us before you sign anything
We've been fitting shutters across Scotland since 1987. Almost forty years. As full members of the British Blind and Shutter Association, our Technical Director David D'Ambrosio is the BBSA's go-to expert on shutters and a Past President of the Association.
Our Edinburgh Design Studio is open by appointment only. Our new Dundee Design Studio, also by appointment only, opens late June 2026. Bring photos of your windows, the quote you've been given, and your worries. We'll talk you through what you're actually being sold, and recommend honestly whether to proceed.
Or call us on 0800 086 2989.
The cheapest plastic shutter you can find online is rarely the bargain it looks like. Spend ten minutes with us before you commit.
The Scottish Shutter Company. Since 1987. The honest guide to shutters in Scotland.
Perfect Fit® is a registered trademark of Louvolite (UK) Limited. This page refers to the Perfect Fit® system nominatively, to identify the product being discussed. The Scottish Shutter Company is not affiliated with, endorsed by, or sponsored by Louvolite.