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Softwood or Hardwood Windows and Doors?

Softwood or Hardwood Windows and Doors? Basically, timber is grouped into two main types – hardwood and softwood. People are often misled by the terms softwood and hardwood, as they are not as literal as they sound. There are hardwoods that are soft as well as softwoods that are hard. For example, balsa, which is a deciduous angiosperm, has very soft wood even though it is classified as a hardwood. What you need to note is that the two types of wood have different properties that meet different requirements in a home. What brings about the difference in both types is their cellular structure. As shown, the hardwood/softwood terminology becomes easier to understand. Less dense trees such as the Evergreens are easier to cut than the deciduous trees which are more dense. Due to this difference, the Evergreens are classified as softwoods while the deciduous trees are hardwoods. Trees don’t need to be of a particular weight to be classified as a hardwood. The following are the various types of woods that you can choose from our manufacturer – if you want triple glazed windows, read on to find out what wood will suit your needs best.

Sapele Type Hardwood

Amongst our products, Sapele windows & doors is KJM’s most preferred. This is due to the fact that Sapele is an incredibly strong, stable and long-lasting tropical hardwood that is ideal for manufacturing joinery. This type of timber is obtained from West Africa and Cameroon and it has a moderate durability rating of Class 3 and 4. Due to its dark reddish-brown appearance, it is aesthetically appealing and goes well with a transparent coating.


One major advantage of Sapele is that it doesn’t require preservation treatment as this species is impermeable, making it treatment-resistant. Its density/hardness is 640 kg/m2 – for comparison, the European Redwood is 510 kg/m2 while the European Oak is 750 kg/m2.

  • Over half of our Sapele purchases from our manufacturer are Verified Progress
  • Suitable for heritage properties and conservation area properties.

Oak Type Hardwood

Oak is the most widely used material for timber windows and it has been used in window construction for hundreds of years. It is a hardwood with a high level of durability and strength. Oak is suitable for heavy uses and is known to last lifetimes when properly maintained. Due to the subtle aesthetics each tree grain offers, oak timber windows are also very attractive.


  • A great option for a heritage aesthetic due to the attractive woodgrain effects
  • High level of strength and durability
  • Can last a lifetime
  • Authenticity
  • Ideal for traditional aesthetic homes, heritage properties, properties in conservation areas.

Redwood Type Softwood

Redwood has minimal uptake of moisture making it great for weatherproofing and extending the service lifespan of windows. Due to this property, redwood timber can be used in a variety of settings. If you want to incorporate a traditional appeal to your property without sacrificing modern aesthetics, then redwood timber is your best choice.


  • Impeccable dimension durability and sturdiness
  • Minimal moisture uptake extends service lifespan
  • Subtle contemporary aesthetic
  • Suitable for contemporary properties and new constructions

Accoya Type Softwood

Accoya wood is a softwood that is specially treated and it has amazing properties. Accoya is treated through a non-toxic acetylation process that alters the cellular structure of the timber which enhances the performance of the wood. In addition to having a long lifespan of 60 years, Accoya wood also has impeccable thermal performance as well as weatherproofing and aesthetics properties. It is also known to repel insects. Accoya is obtained in a sustainable manner and it is ideal for both traditional and contemporary properties. You can get more information and a video presentation on this timber from our Accoya page.


  • Highly durable boasting a service lifespan of over 60 years
  • Minimal likelihood of distortion
  • 40% more energy-efficient than hardwoods
  • When factory coatings are applied on Accoya, they last longer