Thermowood Decking - Get Online Prices

Buy Thermowood decking today, with a choice between seven profiles you will get the decking to suit you.

Thermowood Decking

1) Click to choose a Thermowood Decking profiles

IWD1 - Reeded - 120mm x 19mm
IWD1 - Reeded - 120mm x 19mm
IWD2 - Reeded - 145mm x 19mm
IWD2 - Reeded - 145mm x 19mm
IWD3 - Anti-Slip 1 - 120mm x 19mm
IWD3 - Anti-Slip 1 - 120mm x 19mm
IWD4 - Anti-Slip 1 - 145mm x 19mm
IWD4 - Anti-Slip 1 - 145mm x 19mm
IWD5 - Anti-Slip 2 - 120mm x 19mm
IWD5 - Anti-Slip 2 - 120mm x 19mm
IWD6 - Anti-Slip 2 - 145mm x 19mm
IWD6 - Anti-Slip 2 - 145mm x 19mm
IWD7 - Pencil Rounded - 145mm x 21mm
IWD7 - Pencil Rounded - 145mm x 21mm

2) Choose your Grade of Thermowood Decking

Select Sawfalling Cladding
Sawfalling is a knotty grade of timber. Most will be sound, however, we recommend ordering 10% extra for cutting around any dead knots.

3) Enter your Size and Quantity

Gap (mm)
Get Price
Supplied in lengths of 3m and longer
Example Pricing for Thermowood Decking
Price From £10.00 per meter (Profile: IWD2 - Reeded - 145mm x 19mm - Grade: Sawfalling - 1m)
Product Description

Thermowood decking is a cost effective and durable product. The timber is a Scandinavian Pine which has been heat treated through a steaming process, this process helps to remove almost all of the moisture from the timber in order to make it as stable as possible. All of the resin is also dried up which helps to prevent rotting and leaking onto the surface of the wood, leaving you with a nice clean finish.

Supplied in a Sawfalling grade, you can expect to see a fairly heavy knot content in the boards, the majority of which are sound, live knots. There can be some dead knots though, so we do recommend ordering 10% extra so you can cut these out of the board.

Unpainted Thermowood machines well so you get a smooth finish for your outdoor decking, there are a range of profiles on offer including:

  • IWD1
  • IWD2
  • IWD3
  • IWD4
  • IWD5
  • IWD6
  • IWD7

There are three different profiles with two size options for each profile, select your profile in the list above and input your m2 requirements into the calculator for an instant price.

Although you don’t need to treat the timber because of how stable it is, it does take a paint or oil well if you would like to change or preserve the colour. If you leave it, the Thermowood will naturally turn silver grey over time like all timber.

An alternative to Siberian Larch

One of the reasons we are so keen to offer this timber along with our premium range of hardwoods and durable softwoods, is so that we have a suitable alternative for Siberian Larch which is currently unavailable. With Canadian Cedar prices rising to levels we haven’t seen before it has become more important than ever to offer a cost effective and quality option.

Our Thermowood is available as PEFC certified because it is sourced from sustainable sources.

What do our Customers Say?
Used before. Happy with service.
- Robin Bennett

The website is excellent and I also called your help line a couple of times to ask a few more questions and guidance and the wood experts were very helpful. Thank you.
- Sally Charter

Well priced and easy to order.
- Alan Rumbles

The order process is excellent, this is my second order with you.
- Rob Hill

Your prices are competitive and your website is very good, i was able to order exactly what i want.
- Mark Hotchkiss

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Architect / Design Specify

Product Code: IW-18-64-21-21

Specify: Sawfalling Thermowood External Cladding Thermowood Decking from iWood Timber

Some commonly asked questions


Our timber is imported straight from sawmills on the continent. Our usual lead times are therefore 10 to 14 working days.


We calculate our delivery costs based on how far away you are from us, to get more information on this please check out our shipping costs page.


Our delivery lorries visit different parts of the country on different days, so once your order is ready we will work with you to arrange a delivery day for when one of our lorries is in your area. We will always arrange the delivery day in advance with you.


We deliver weekdays Monday to Friday between the hours of 8am to 5pm. Our delivery vehicles will have multiple jobs on them which can affect the delivery time to you, depending on factors such as traffic and how long it takes to offload the previous jobs. The driver will call you in advance with an estimated time of arrival to make sure you'll be there.


You can place your order online by working out your price above and adding your items to your shopping basket. You can then check out and your order will be processed securely and a confirmation email sent. Once your order arrives in our depot, we'll give you a call to arrange delivery.


Yes you can, you can order samples of certain timbers at If the species you need isn't there please give us a call or talk to us on our online chat.

The timbers shown are planed all round samples and are not profiled.

Still Have Questions?

Call our seasoned sales team on 01889 597 281.

Send us a message through our Contact Form.

Email your cutting list to