Radnor Timber Cladding and Weatherboards

Whilst each project differs to the next, and we can’t cover all eventualities, here are a few guidelines to help you get the best from your timber weatherboards and cladding.

Firstly – what is the difference between ‘timber cladding’, ‘timber weatherboarding’ and ‘timber weatherboard cladding’? – Nothing! All of these terms are frequently used but are the same type of product – i.e. a skin of protective exterior cladding made up of timber boards fixed with an overlap or joint.


Normal practice is to ‘face fix’ using nails or screws (i.e. fixing the cladding to wall studs through the front face of the timber cladding.)

Our timber cladding should be fixed to your building at a maximum of 600mm centres (preferably closer).

The length of the nail or screw should be two and a half times the thickness of the board.

All fixings must be corrosion resistant.

We recommend a 50mm overlap. 200mm boards therefore offer 150mm of cover.

We recommend one fixing per board on each wall stud 60mm from the bottom of the weatherboard. This fixing will not touch the board beneath it if the overlap is 50mm.

If fixing feather edged boards, ensure that the thickest edge is at the bottom.

Ensure that the wall studs which are being fixed to are upright, and that all fixings are in line vertically.

Pre-drill pilot holes 2mm to 3mm larger than the diameter of your fixings to allow for any movement that may occur after installation, and to help prevent splitting at the fixing points . Pre-drilling should be in line with the centre of the wall studs, and at least 22mm from the ends of boards.

Avoid overtightening of screws or hitting nails in too far as this results in splits.

Nail Fixing – If using nails, we recommend hand nailing with the small headed stainless steel ring shank nails we offer. If using pneumatic fixing guns, extreme care must be taken to ensure the surface of the timber cladding is not affected by impact damage, or the fixings aren’t driven below the surface. Many fixings supplied for gun application come with off centre D shaped heads and are often not aesthetically acceptable.

Screw Fixing – For screw fixing, we recommend installing our stainless steel screws using a battery operated screw driver which will insert the screw at a controlled speed.


We recommend that you assess your project before cutting any boards. Begin by fixing the longest boards you require. Keep offcuts as some shorter lengths may be usable as you progress with your project.

Cut boards accurately and squarely.


Your choice of timber cladding species is a personal thing – if you already have oak weatherboarding on a building nearby, you may opt for oak as your new weatherboard.

You may have a planning permission which stipulates a certain type of timber cladding (Larch is becoming more popular).

If you prefer not to have any chemical treatment then Oak, Larch, Douglas Fir or Western Red Cedar are the best options.

If you are cladding a wall which is likely to receive impact (ie. such as the inside of a log store), we would recommend Oak as the toughest type of cladding.


Domestic – most applications such as sheds, outbuildings, garages, annexes, studios, houses and garden offices.

Commercial – Most commercial applications such as offices, community halls, schools, commercial buildings.  

Our exterior weatherboard cladding isn’t suitable for interior rooms which have excessive fluctuations in moisture, humidity or temperature such as conservatories, bathrooms, utility rooms, cellars, basements, wet rooms or saunas. See our interior cladding for suitable products.


We will store your products under cover and pack them for delivery in perfect condition.

We recommend fitting your weatherboard cladding as soon as possible after delivery.

Once you have received delivery, your timber cladding should be stored immediately out of direct sunlight as this can split and twist the boards in a very short time.

The weatherboards should be stacked flat horizontally (not on edge) on timber bearers or pallets on a level surface. Bearers should be beneath both ends of all boards, and additional bearers should be positioned no more than 600mm apart. If storing on pallets which are shorter than the weatherboards, bearers should be used to support the ends (again at 600mm maximum spacings).

All timber bearers must be identical thickness, and should not be wet.


Once you have selected your type of weatherboard, work out how many M2 you need to cover your project. Now work out how many boards you require, remembering that each board has 150mm of cover.

A 2400mm x 200mm board covers 0.36m2

A 3600mm x 200mm board covers 0.54m2

We would recommend before ordering that you assess how many of each length of weatherboard you require (based on the lengths available on this website) and allow a minimum of 10% extra for boards which are rejected due to their appearance, wastage resulting from the removal of unwanted natural defects, and wastage as a result of cutting boards to suit the position of wall stud.

Finally, assess the accessories you require.

You are now ready to place your order!

A few more thoughts………

As timber weatherboarding is a natural product, movement in some boards it to be expected. Some boards will sit perfectly flat once fitted, whereas some may twist and turn. Some will cup, and some may split during excessive weather (i.e. during a dry or hot period after a wet period). These are natural characteristics and are not defects. Each board is unique and may have knots, sapwood and colour variation which are not preferred by customers. Unwanted natural defects can be cut out during installation and some of the resultant cut boards can be used at the end of rows.

Buildings which are timber clad must with be fitted with properly fitted, functional rainwater guttering and downpipes.

Our weatherboard cladding is not fire protected. If required, fire protection can normally be obtained by applying intumescent paint.

The dimensions and appearance of natural timber weatherboarding can vary slightly – these are typical characteristics and are part of the unique character of your completed project!