Douglas Fir Shiplap Cladding
There are two profiles that we supply in Imported Douglas Fir Shiplap Cladding:
- IWC6 - 19mm x 145mm overall, with a 135mm face - For horizontal fitting
- IWC7 - 19mm x 145mm overall, with a 128mm face - For horizontal fitting
All our shiplap cladding is designed to be fitted horizontally and the main difference between the two profiles is the face width: IWC6 gives you a 135mm face and IWC7 gives you a 128mm face.
Douglas Fir is a light reddish-brown colour and because it is supplied in the "85/15 Clears" grade, it will have very few knots when compared to British Douglas Fir. Any knots that are found will be small and none of them will be large dead knots. This machined cladding is a modern take on a traditional form of building coverage.
The possible movement of the timber means that you will have to treat your cladding in order to preserve it for as long as possible. By sealing the boards, you will help to prevent moisture leaving and entering the wood, which will stop it from shrinking and expanding. You can also protect your timber from UV light which will stop the colour from weathering to a silvery grey. See our "Treatment Guidance" section above.
We provide Douglas Fir Shiplap Cladding in random lengths of 3m and longer. On some occasions we can provide exact lengths upon request, so if you do need certain lengths give us a call on 01889 597281 or talk to us on the online chat (before ordering) and we will be happy to find out if we can supply the lengths you want. If we can, just enter your lengths into the “Special Instructions” box on the shopping basket page before you checkout.
Be sure to read through our treatment information by clicking on "Treatment Guidance" above. It talks about sealing, preserving and protecting the timber from the sun's UV rays. Here are quick links to the products we recommend:
Our fitting guidelines are designed to give you a starting point on how to fit your shiplap cladding and we recommend that you consult an expert fitter to advise on your actual scenario.
Be sure to read our treatment guidance as treatment needs to be applied prior to fixing your cladding
Consult a fitter to determine if your scenario would require the fitting of a breathable membrane between your wall and the cladding. This membrane stops rain getting to the wall, but allows moisture to escape, helping to prevent internal condensation and mould that can come with it.
Treated Softwood Battens
Treated softwood battens (available from our cladding accessories pages) are most commonly used to fix to the wall (or on top of the breathable membrane) to then fix your cladding to. Shiplap cladding is to be fixed horizontally only, so your battens need to be placed vertically, at around every 600mm (60cm).
Fixing the Cladding
** Whether you use nails or screws, it's important that they are stainless steel, or silicone bronze ARS, so that the natural tanins in the timber will not corrode them. Never use iron nails for fixing timber.
The timber is designed to only be fitted horizontally with the start of the running lip across the width of the timber at the top. To stop your wood from splitting it’s best to pre-drill any holes and then hold the boards with the head of the screw.
You can also use nails, preferably ring-shanked for extra grip, and again stainless steel so they don't corrode. For lower-density species like cedar, consider using nails with larger heads so the cladding doesn't pull through.
As already stated, these are just ideas to get you thinking about installation and you should consult a professional installer before fitting your cladding as every scenario is different.
Treating Timber Cladding
All of our timber cladding is provided untreated.
For best results, cladding should be treated before it is installed to ensure application of the treatment on all sides and ends of the boards.
We recommend Wood Finishes Direct for all of your treatments. We have found them to be well priced and their telephone support and advice is second to none. We highly recommend giving them a call.
The following information is from Wood Finishes Direct in relation to treating timber cladding.
When it comes to treating your timber cladding, there are three areas of protection to consider.
- Sealing against moisture movement - Sealants are used to help prevent moisture entering the wood causing it to expand. Kiln dried timber like European Oak will definitely need to be sealed, and for other timbers it is highly recommended.
- Wood Preserver - Helps to prevent rot and protects the wood from insect infestation and mould.
- UV Protection - The ultraviolet rays of the sun slowly bleach external timbers. UV protection oil helps to keep the natural colour of your timber for longer and prevent it from turning silvery grey so quickly. Some people like their timber to weather and prefer the silvery grey look so it’s completely down to you.
The following links will take you straight to the products on Wood Finishes Direct's website:
Product to Seal and Preserve
To address Sealing and Preserving, they recommend applying one or two coats of "Wood Preserver Basecoat - Barrettine Premier Universal Preserver" before installation to seal against moisture movement and protect it from mould and insects.
Product to Protect from UV Rays
Then to optionally delay weathering, two coats of OSMO UV Protection Oil. There are different colours of OSMO UV Protection Oil available, with names like 'Cedar' and 'Oak', but these colours are to make other timber look like the stated species. We recommend the 420 clear version which interferes the least with the natural colour of your timber.
What do our customers say?
Pleased with the quality of oak and price, and very friendly and helpful staff when you collect. Thank you.
- Bryan Martin
The ordering process is very good, and helpfull advice given over the phone.
- David Hudson
Prices were clear to understand. My first order and went very well.
- Ernest Warren
Used before. Happy with service.
- Robin Bennett
Stanbrook & Nicholson Ltd have been buying European Oak from iWood since their inception. In our trade it is often difficult to get both service and product quality from our suppliers. iWood have consistently provided us with an absolute first rate product with service to match. A high proportion of our timber purchased comes as cut to size putting our wastage at nearly zero per cent. This also speeds our process of manufacture.
- Ben Stanbrook and Simon Nicholson
Architect / Design Specify
85/15 Clears Douglas Fir External Cladding Shiplap Cladding from iWood Timber
Some commonly asked questions
How long does the cladding take to deliver?
Because we are sourcing our wood based on demand to ensure the highest quality, delivery may take from 14 to 17 working days once your oder has been placed with us.
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 HERE.
How do I receive a delivery?
Our deliveries are carried out by a third party haulage company. Because many of our customers have forklifts on-site, the standard delivery trucks often do not have cranes (or hi-abs) on them. For this reason you'll need person-power available to unload your delivery. We are able to quote for crane-offloading if need be. Please give us a call.
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.