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Douglas Fir Board on Board Cladding

Canadian Douglas fir is a red-orange colour with fewer knots than its British counterpart.

Douglas Fir Cladding

Work out a Price Below

Please note that iWood is a wholesale timber merchant, and to maintain such competitive prices, we have a minimum order amount of £750.00 ex VAT for delivery (£350.00 ex VAT for collection).

1) Click to choose a Board on Board Cladding profile

IWC28 Board on Board (174mm face)
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IWC28 Board on Board (174mm face)
IWC29 Board on Board (100mm face)
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IWC29 Board on Board (100mm face)

2) Click to choose a grade of Douglas Fir

Select 85/15 Clears Cladding
85/15 Clears
85/15 is a very high grade of Canadian Douglas Fir with few knots

3) How much Douglas Fir Board on Board Cladding do you need?

 
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Get Price

How to measure for cladding

Working With Set Lengths

Product Description
Treatment

Douglas Fir Board on Board Cladding

iWood supplies 85/15 Clear & Better Grade Douglas Fir Board on Board Cladding, it is lightly coloured timber with pink hues and very few knots. This creates a very modern aesthetic that suits contemporary structures.

85/15 Clear Douglas Fir is a trade favorite and is used extensively for timber boarding applications, such as: floor boarding, internal and external cladding, partition boarding and so on. This versatility is down to its stability, durability, strength, reliability and cost. All pieces are kiln dried to make them even more stable, it also takes treatment well.

It is a class 3 durability product which gives a service life of at least 15 years. As a cladding however, in ideal conditions with regular maintenance and proper installation, Douglas Fir has been known to last all the way up to 50 years.

What are the Options for Douglas Fir Board on Board Cladding?

We can supply Douglas Fir in two profiles, IWC28 and IWC29.

IWC28 – This traditional profile is consists of a board behind and a board in front. The front board overlaps the board beneath by 20mm. When viewed from a distance, this creates a striped aesthetic and a natural shadow gap whilst completely covering the structure beneath, protecting it from the elements. You must face fix the boards that are on top, directly into the battens, ensuring not to go through the overlapped board beneath.

IWC29 – These boards are planed all round and designed to be face fixed with a 5mm gap between the back boards which is then covered by a smaller strip. It’s important to have sufficient waterproofing behind these boards.

Both profiles are vertical fitting only.

What is the Grade of Douglas Fir Supplied?

85/15 Clear & Better Grade is a very high grade mostly free of knots. Douglas Fir is imported in a mix of No.2 grade and No.3 grade, No.2 being exceptional and No.3 being very good. 85/15 refers to the percentage of each grade, 85% will be No.2 graded and 15% will be No.3 graded. It is common for this grade to be ordered in mixed lengths so that you can cut around any knots.

Is Douglas Fir Good for Cladding?

Douglas Fir is a lightweight and versatile timber with many qualities that make it a great choice for cladding. It is imported kiln dried so is very stable and experiences little moisture movement. This stability alongside its high durability, natural rot resistance and strength and strong attractive grain make it a solid all round timber for cladding.

Example Pricing for Douglas Fir Board on Board Cladding - Boards in Stock Machined to Order
Price From £21.71 ex VAT per meter (Profile: IWC28 Board on Board (174mm face) - Grade: 85/15 Clears - 1m)
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Just a quick line to say thanks for the swift delivery of the ash I ordered a couple of weeks ago. It is now installed as stair treads/ landing and looks superb. Just one small gripe, the delivery driver didn't call me to say he was on his way which meant I had to rush over; he did help me carry it into the house though. I think the picture does them justice.
- Stephen Barker, Spalding
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Architect / Design Specify

85/15 Clears
Product Code: IW-18-16-30-22

Specify: 85/15 Clears Douglas Fir External Cladding Board on Board Cladding from iWood Timber

Some commonly asked questions

DELIVERY TIMES

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

WHAT ARE YOUR DELIVERY COSTS?

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.

DELIVERY DAY

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.

DELIVERY TIMES

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.

HOW DO I PLACE AN ORDER FOR CLADDING?

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.

CAN I ORDER SAMPLES?

Yes you can, you can order samples of certain timbers at www.iwood.co.uk/sample-request/. 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 enquiries@iwood.co.uk.

To get a price, you can type in how many square metres of cladding you need. It's very easy to work out.

We're going to work out the total area of one side of a building, then subtract the windows and doors, then add 10% extra for wastage.

1) For each wall that you’re cladding, measure the full width and the height in metres to work out the total area.

In this (expertly designed) example, the frontage is 9 metres wide and 4.7 metres high. 9 x 4.7 gives a total 42.3 square metres.

How to measure For Cladding Step 1

Total area of frontage = 9 * 4.7 = 42.3 square metres

2) Work out the area of the doors and windows

In this house front there are four windows and a door. Measure the width and height of each window and door, then add the areas together:

How to measure For Cladding Step 2

  • Window 1: 1.9 x 1.2m = 2.28 square metres
  • Window 2: 1.2 x 1.2m = 1.44 square metres
  • Window 3: 1.2 x 1.2m = 1.44 square metres
  • Window 4: 1.9 x 1.2m = 2.28 square metres
  • Door: 1.0m x 2.0m = 2.00 square metres

Total area of windows and doors = 9.44 square metres

3) Subtract the area of the doors and windows from the total area of the wall.

We now have our total area (42.3 square metres) and the total area of the doors and the windows (9.44 square metres). Because we don't want cladding to cover the windows and door, we take the door and window area away from the total area.

Total area to clad = 42.3 – 9.44 = 32.86 square metres to clad

4) Add at least 10% spare for wastage

We recommend ordering at LEAST 10% more cladding than you've measured for to account for the required cutting and shaping.

32.86 square metres + 10% = 36.146 square metres. In this case, we'd round it up to 37 square metres.

Total to order = 37 square metres

Do the same for any other sides of the building, add them together and you'll have your grand total.

When working with set lengths it is important to take into account any waste.

This is easy enough if you can select the exact length you need, however, that isn’t always the case which is where you need to take a bit more care when ordering. If you can select the length you want, our website will automatically work out the number of pieces required, otherwise you will have to work out the additional quantity.

So for example, if you are cladding a wall that is 2.3m high and 6m wide (as seen in the below image) with vertical cladding, you may want set lengths so that you have no vertical joins.

Set length Example Wall

To work out your coverage you will need to do the quick calculation to work out your area:

Square Metre Calc

Height x Width = Square Metres
2.3 x 6 = 13.8m2

Once we have this we can work out your linear meters (Our website will let you enter either square or lineal metres as a quantity and will automatically work out the other for you).

The linear metres required depends on the profile, so for this example we are using IWC1 which has a 135mm face.

Linear Metre Calc

Square Metres / Face (in metres) = Linear Metres
13.8 / 0.135 = 102.22

Set length Example Quantity

This is where we need to work out what quantity you actually need. For a 2.3m length in this example, the closest set length is 2.44m so to get a price the iWood website will do the following calculation.

Number of Pieces Calc

Linear Metres / Length of Pieces (Rounded to next highest number) = Number of Pieces
102.22 / 2.44 = 41.89 – Rounded to 42

Now to work out the actual number of pieces we need, we need to change that calculation to this:

Linear Metres / Length Wanted = Actual Number of Pieces required
102.22 / 2.3 = 44.44 – Rounded to 45

So, with the first calculation we would have been 3 pieces short.

So now we need to work out the actual number of lineal metres we need in order to not be short on order. So now we need to rework out our quantity.

Number of pieces needed * Length of Pieces = Actual Quantity
45 * 2.44 = 109.8

Enter the new Actual Quantity into the linear metres and you will get the correct price.

We do recommend adding 10% waste on all cladding orders just to account for any cutting that needs to be done on site.

Wastage Calc

Qty (either square metres or linear metres) * 1.1 = total with 10% waste.