Maintaining your timber cladding
Maintaining your timber cladding (Scandinavian Redwood)
Treatment Information
Although the TANALITH wood preservative used in the pressure-treatment process is of the highest quality, it doesn’t protect timber from the effects of weather. Without additional protection UV rays from the sun will weather timber changing the colour to silvery grey. Moisture will negatively affect the lifespan and performance of a timber product, so it’s essential to add a high-quality protective water-repellent coating to your cladding.
During the pressure-treatment process, some grain maybe raised. If desired this can be removed with a little light sanding.
Please fine our sand paper here
Please find UV protection here
Please find water-repellent here
Nail heads should only be driven marginally below the surface of the cladding. We recommend 2.5 x the thickness of the cladding board into the support batten.
Acetic acid is present in timber cladding and strong enough to corrode all mild & galvanised steel fittings. Most dangerous when mixed with moisture or salt air. This is why we would always recommend using only the highest of quality fixings to reduce all chances of corrosion!
Changes in the weather may cause fixings to loosen but these should be tightened up when appropriate.
Please find our stainless steel fixings here.
Please find our tools here.
Stains & Treatments
Some staining can occur on paint coatings as sap & resin come out of the new timber. This is a natural process but a stain-blocking primer and knotting agent can be applied prior to painting to minimise potential staining.
The cladding is pressure treated but will need additional protection from the weather and in particular, moisture penetration. Apply a high-quality water-repellent paint or oil to help seal the shed, making sure that joints and fixings such as nails and screws, are well covered.

A good microporous coating will allow any internal moisture to evaporate out through the external coating.
When applying a wood paint, oil, or stain, pay particular attention to horizontal surfaces and areas that can collect water. Coatings will degrade quickest on a horizontal plan with cheaper products wearing faster. Vertical surfaces can last for years before a maintenance coat is required.
We advise all boards to be stained and treated before application of fixings, leading to a more professional look as it limits expose of unfinished timber.
We would alway recommend purchasing our Osmo clear UV protection & waterproof agent. Opaque stains required the least amount of maintenance and is likely to avoid any bubbling.
If you would prefer coloured stains, please see our range here.
Please fine stain-blocking primer here
Please find knotting agent here
Mould & Algae
Green marking may become visible as salt leaves the timber whilst it dries following pressure treatment. It will fade over time and does not affect the performance of the product.
Remove any of this solid salt residue with a wire brush or light sanding prior to painting. 
Please find our cladding wash here.
Please find our brush here.
Change In Shape
Softwood is a natural product that can twist or warp through changes in climatic conditions. To minimise this, You’re cladding should always be fixed firmly and level, avoiding areas where water can collect.
Keep away from installing cladding before or during a heatwave, a cool dry month is the perfect conditions.
Softwood may at times develop cracks in the surface called ‘shakes’. These are a natural occurrence and can be prevalent during changes in temperature and humidity as the timber expands and contracts. Please note that this will not affect the performance or durability of your product. If desired, any ‘shakes’ can be rectified by applying a proprietary wood glue making sure to follow the manufacturer’s instructions at all times. Once dry this can be sanded to a smooth finish. Application of a high-quality protective water-repellent coating can reduce cracking by stopping moisture penetrating into the timber, one of the causes of this natural process in timber products.
Please find our sand paper here.
Please find our glue repair here.
Please find our water proofing agent here
Over time the colour of your cladding will gradually weather, first to a honey brown and then to a silver grey. This does not indicate any loss of preservative protection. To keep the original colour of your timber you will need to apply a clear wood paint, oil, or stain, that has UV blockers to stop the greying process.
If you’re in an urban area remember dirt and pollution will affect the colour and condition of your cladding. In this case It’s important to regular clean the cladding.
Please find our UV protection here
Maintain your timber product on an annual basis, or sooner if required. Clean paint coatings with soapy water and apply a maintenance coat when required. The better the quality the more years it will be before a maintenance coat is needed.
New research recommends the most suitable way to clean your cladding without causing damage to treatments is by using a pressure washer. Extremely efficient also.
Pleas find our wash here
Air Flow
Suitable airflow should be allowed throughout the structure to assist with on-going drying.
Please find our timber battening here
Timber Framing & Battens
Cladding should be fixed to treated softwood cladding battens. Battens should be fixed perpendicular to the cladding boards.
Horizontal cladding boards on vertical battens. Vertical cladding boards on horizontal battens.
Reliant on the installation method, vertical counter battens may be installed first to provide drainage and ventilation.
Horizontal battens should have their top edge angled to shed water.
Please find our end grain sealant here.
We advise cutting all ends of vertical cladding board to an angle which will allow moisture to run off from the ends of the boards. Where a cut end grain of boards is present, we would always advise each cut end to be treated with sealant.
We also recommend where the end of a board reaches a corner, a gap of a minimum of 8mm should be left to dramatically reduce the chance of water sitting against the end grain.
Please find our end grain wax here.
Please fine our saw here.
Fire Safety
Zeroflame Treatment fire retardant coating for external cladding.  A couple of points worth noting are: For most species of timber the total coverage rate to work to is 3.7m²/L.  For cedar only the total coverage rate is 2.7m²/L to achieve Euro Class B and Class 0 spread of flame and fire propagation. For cladding we recommend coating all sides of the panels. We recommend the cladding being a minimum of 14mm.With Zeroflame Treatment the timber should be unsealed to enable the Treatment to be absorbed.
Please find our fire safety stain here.
Rodent & Insect Mesh 
Our mesh can be used to prevent insects  access by restricting the open areas but maintaining good ventilation and air flow to the building.Specified to keep insects out of the gaps behind external cladding. The mesh is non-combustible and will not rust or corrode. The mesh can be fixed with staples, battening, tacks or with a bead of silicone
Please find our Insect mesh here.
Roofing sheets
Economic, lightweight and easy to install, Vistalux is a versatile corrugated rooflight. It is easy to cut, drill and install with standard DIY tools and is available in a choice of corrugated profiles in clear or translucent tint options. 10 year warranty! 
We also offer an environmentally friendly roofing options, Coroline corrugated bitumen sheets are tough, lightweight roofing and cladding materials made from bitumen saturated organic fibres. Coroline is 2.6mm thick.
Please fine our roof lights here
Please find our roof sheets here