What is Paulownia Timber? Why We Use It for Every Shutter We Fit in Suffolk

When homeowners ask us what our shutters are made from, we tell them straight away — 100% Paulownia hardwood. No MDF, no composite, no filler materials. Every shutter we fit across Suffolk, from the coastal properties of Southwold and Aldeburgh to the period townhouses of Bury St Edmunds and Woodbridge, is made from Paulownia timber.

Most shutter companies do not make this information easy to find. We think that is wrong. When you are investing in a permanent fixture for your home, you deserve to know exactly what it is made from and why. This guide explains what Paulownia is, where it comes from, how it compares to the alternatives and why we chose it as the exclusive material for everything we fit.

What is Paulownia timber?

Paulownia is a deciduous hardwood tree native to China, where it has been cultivated for its timber for over three thousand years. It is sometimes called the Princess Tree or the Empress Tree, and in East Asian cultures it carries significant cultural and historical importance — traditionally planted at the birth of a daughter and harvested to make furniture when she married.

In the modern timber industry, Paulownia is valued for a combination of properties that are unusual in a single species. It is exceptionally lightweight — one of the lightest hardwoods commercially available, with a density roughly a third lower than oak. It is also remarkably strong relative to that weight, with a tensile strength that compares favourably with timbers that are significantly heavier. It has a fine, straight grain, takes paint and stain well, and has a naturally low moisture content that makes it highly resistant to warping and swelling.

These properties make it ideal for window shutters. And for a county like Suffolk — with its Victorian period properties, its coastal humidity and its demanding North Sea environment — they make it the right choice specifically.

How does Paulownia compare to MDF?

MDF — medium density fibreboard — is the material used in the majority of shutters sold in the UK market. It is cheap to produce, easy to machine into consistent shapes and takes paint well in a controlled factory environment. For a budget shutter manufacturer, it makes commercial sense.

But it has weaknesses that become significant in real-world conditions.

Weight — MDF is considerably heavier than Paulownia. For a standard full-height shutter on a Victorian sash window, the weight difference between an MDF panel and a Paulownia panel of the same dimensions can be several kilograms. Over time, heavier shutters place more stress on hinges, frames and the original window structure — particularly relevant in the older properties found across Lavenham, Bury St Edmunds and Woodbridge.

Moisture — MDF is manufactured from wood fibres bonded with resin under pressure. When exposed to moisture — humidity, condensation, coastal air — the fibres absorb water and the board swells. This manifests as panels that no longer close flush, surface paint that cracks and bubbles, and in severe cases structural deformation of the shutter panel itself. In coastal Suffolk this is not a theoretical risk — it is what happens to MDF shutters over time.

Repairability — A damaged MDF shutter panel generally cannot be repaired. The material does not respond well to patching or refinishing once it has swollen or the surface has deteriorated. A Paulownia hardwood shutter can be sanded, refinished and repainted if necessary — it behaves like real wood because it is real wood.

Longevity — MDF shutters in coastal or humid environments typically begin to show deterioration within five to seven years. Paulownia hardwood shutters last decades. Our 15-year guarantee reflects the confidence that comes from using the right material in the first place.

Why does Paulownia's weight matter so much in Suffolk?

Suffolk has an unusually high proportion of older housing stock. Victorian terraces in Bury St Edmunds, Georgian townhouses in Woodbridge, medieval timber-framed cottages in Lavenham — these properties were built with craftsmanship and materials that have lasted centuries. The window frames in these buildings are original. The sash mechanisms are original. The timber surrounds are original.

Fitting a heavy MDF shutter to a 150-year-old sash frame is a decision that catches up with you. The additional weight stresses the frame, the hinges and the glazing. Over time it accelerates wear on mechanisms that are already working hard to support their own age.

Paulownia shutters are light enough that the original fabric of these buildings is not compromised. We can fit shutters in a Victorian sash window or a listed Georgian frame with confidence that we are not creating a problem for the building in ten years' time.

This is not a theoretical concern for us — it is something we factor into every survey we do across Suffolk. When we walk into a property in Lavenham or a seafront villa in Southwold, the age and condition of the window frames is one of the first things we assess. Using Paulownia means we can almost always say yes where a heavier material might give us cause for concern.

Why does Paulownia's moisture resistance matter on the Suffolk coast?

The Suffolk Heritage Coast is one of the most exposed stretches of coastline in England. The North Sea brings persistent salt-laden air, high humidity and the kind of conditions that test building materials far harder than an inland environment does.

In towns like Southwold, Aldeburgh and Walberswick, we have seen the effects of the coastal environment on interior fixtures over the years. Timber that swells seasonally. Paint that lifts at the edges. Materials that looked fine on installation and deteriorated within a few years.

Paulownia's naturally low moisture content and its tight grain structure mean it does not absorb moisture in the way MDF does. It moves far less with seasonal humidity changes. It does not swell at the edges of panels. The finish — paint or stain — stays adhered to the surface because the substrate beneath it is stable.

This is why we would never fit MDF shutters in a coastal property. Not because it would reflect badly on us — though it would — but because it would not serve the homeowner well over time. In Southwold or Aldeburgh, MDF shutters are not a question of preference. They are genuinely the wrong material for the environment.

Why does Paulownia's moisture resistance matter on the Suffolk coast?

The Suffolk Heritage Coast is one of the most exposed stretches of coastline in England. The North Sea brings persistent salt-laden air, high humidity and the kind of conditions that test building materials far harder than an inland environment does.

In towns like Southwold, Aldeburgh and Walberswick, we have seen the effects of the coastal environment on interior fixtures over the years. Timber that swells seasonally. Paint that lifts at the edges. Materials that looked fine on installation and deteriorated within a few years.

Paulownia's naturally low moisture content and its tight grain structure mean it does not absorb moisture in the way MDF does. It moves far less with seasonal humidity changes. It does not swell at the edges of panels. The finish — paint or stain — stays adhered to the surface because the substrate beneath it is stable.

This is why we would never fit MDF shutters in a coastal property. Not because it would reflect badly on us — though it would — but because it would not serve the homeowner well over time. In Southwold or Aldeburgh, MDF shutters are not a question of preference. They are genuinely the wrong material for the environment.

Why do we use Paulownia exclusively?

We made a deliberate decision early on that we would fit only 100% hardwood shutters. Not hardwood where the customer chose the premium option and MDF where they chose budget — hardwood on every job, every time.

That decision was driven by a simple principle: we would not fit anything in someone's home that we would not be completely confident recommending. MDF shutters are not something we would be comfortable recommending for the properties we work in across Suffolk. The weight issue, the moisture issue and the longevity gap between hardwood and MDF are not marginal differences — they are significant ones that affect how a home looks and performs over years and decades.

Paulownia is the material that lets us back our work with a 15-year guarantee and mean it. It is the material that lets us fit shutters in a coastal property in Aldeburgh or a listed building in Lavenham without any reservations. It is the material that, in our experience, gives Suffolk homeowners the best long-term result.

That is why we use it. And it is why we are upfront about it.

If you would like to find out more about our shutters or get a price for your home, we offer free, no-obligation surveys across Suffolk, including Southwold, Aldeburgh, Woodbridge, Bury St Edmunds, Walberswick and Lavenham. Book your free survey here.