Structural Composite Joist 3.66m

Structural Composite Joist 3.66m
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SALE 20% OFF

Length 3.66m

Width 100mm

Thickness 50mm

Structural Composite Joist 3.66m

Joists are weatherproof, low maintenance, hardwearing support for your decking. They create a stable subframe.

Important: To ensure we have sufficient stock availability for full sets we are currently only selling this product with a purchases of our composite fence panel sets or to make a full fencing set. If this product is purchased individually without other products to make a full set we may not be able to fulfil your order.

Per customer:

Up to 2 sample boxes of any type - £0.00 with Free Postage
for 3 or more boxes a small postage charge will apply.

If you proceed with a future order we will refund any postage paid for samples.

In Stock

In Stock

Available to Order - Approx lead time 5-6 weeks

In Stock

Limited Stock. Orders over 9 bays will be a pre-order with delivery approx mid December

In Stock

Limited Stock. Orders over 9 posts will be a pre-order with delivery approx mid December

In Stock

Limited Stock. Orders over 90 slats will be pre-order with delivery mid December

In Stock

Limited Stock. Orders over 10 sets will be pre-order with delivery mid December

Out of Stock

Temporarily Out of Stock

U Channel Inserts are temporarily out of stock.
Pre-order with deliveries starting mid May. Secure your stock with a £100 deposit or order now online. For more information or to pay a deposit please contact our team

Oak Slats are temporarily out of stock.
Pre-order with deliveries starting mid August. Secure your stock with a £100 deposit or order online today. For more information or to pay a deposit please contact our team.

Oak Slats are temporarily out of stock.
Pre-order with deliveries starting mid August. Secure your stock with a £100 deposit or order online today. For more information or to pay a deposit please contact our team.

Grey Slats are temporarily out of stock.
Pre-order with deliveries starting early July. Secure your stock with a £100 deposit or order online today. For more information or to pay a deposit please contact our team.

Charcoal Slats are temporarily out of stock.
Pre-order with deliveries starting early July. Secure your stock with a £100 deposit or order online today. For more information or to pay a deposit please contact our team.

Anthracite Slats are temporarily out of stock.
Pre-order with deliveries starting early August. Secure your stock with a £100 deposit or order online today. For more information or to pay a deposit please contact our team.

Charcoal Posts 3m are temporarily out of stock.
Pre-order with deliveries starting end of June. Secure your stock with a £100 deposit or order now online. For more information or to pay a deposit please contact our team

Charcoal Posts 3m are temporarily out of stock.
Pre-order with deliveries starting end of June. Secure your stock with a £100 deposit or order now online. For more information or to pay a deposit please contact our team

Oak 3.66m Decking is temporarily out of stock.
Pre-order with deliveries starting mid-late April. Secure your stock with a £100 deposit or order now online. For more information or to pay a deposit please contact our team

Teak 3.66m Decking is temporarily out of stock.
Pre-order with deliveries starting late June. Secure your stock with a £100 deposit or order online today. For more information or to pay a deposit please contact our team.

Pre-order - Delivery Mid June
You can secure your stock with a £100 deposit.
For more information or to only pay a deposit please contact our team

Pre-order - Delivery Early July
You can secure your stock with a £100 deposit.
For more information or to only pay a deposit please contact our team

Due to limited stock orders over 7 total charcoal sets will be a pre-order with delivery starting early July. Secure your stock with a £100 deposit or order online today. For more information or to pay a deposit please contact our team.

Due to limited stock orders over 65 total charcoal slats will be a pre-order with delivery starting early July. Secure your stock with a £100 deposit or order online today. For more information or to pay a deposit please contact our team.

Due to limited stock orders over 18 total grey sets will be a pre-order with delivery starting early July. Secure your stock with a £100 deposit or order online today. For more information or to pay a deposit please contact our team.

Due to limited stock orders over 165 total grey slats will be a pre-order with delivery starting early July. Secure your stock with a £100 deposit or order online today. For more information or to pay a deposit please contact our team.

inc VAT

£ 39.99 

inc VAT

Don't know how much to order? Use free our decking calculator here

Our Structural Composite Joists are weatherproof, low maintenance, hardwearing supports ideal for creating strong and stable cross beam network for your subframe.

Having a strong stable subframe is critical to all decking projects and using composite joists that will not rot, warping, splinter or split, and won’t require the treatment create the perfect replacement for timber joists.

Specifications
Specifications

Each joist measures: 3600mm x 100mm x 50mm
Approximate weight:
15.7kg each

These 100mm x 50mm joists should be spaced no more than a maximum of 400mm apart for Decking.

Alpha Composite joists can be used for most domestic decking and can be used directly on a solid weight-bearing base such as concrete or used as part of a post and joist network.

How many will I need?

We recommend approximately 1 structural joists per square metre of decking.

Key Features

All our residential composite decking and composite fencing comes with a limited 15 year warranty so there's no need to worry.

In Stock


Free Delivery with all orders over £1,500*

Delivery lead times for In Stock products: 2-7 working days (England & Wales)

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*Scotland Deliveries have a minimum long distance delivery charge of £300 for all orders and delivered within 15 working days

Deliveries are mainland only and exclude - Scottish Isles, Highlands, IOM, IOW, GY, JE.

Deliveries where ferries are necessary may be possible at an extra cost such as IOW, please contact us before ordering.

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All our standard deliveries are made by our in house delivery team to ensure the products arrive to you in perfect condition every time.

We have a 5* rating on Google Reviews

Alpha Decking 5 Star Reviews

We're rated excellent on Trustpilot

Rated Excellent on Trustpilot

Product Features

15 Year Residential Warranty
Low to no maintenance, never treat or stain
Easy to install. No rotting, warping or splinters
3D Deep Embossed Wood Grain
Whole family safe, highly slip resistant decking

Product Features

15 Year Residential Warranty
Low to no maintenance, never treat, stain or paint
Easy to install. No rotting, warping or splinters
Choice of Colours
Fit into concrete post using our u channel adapter or install using composite posts

Use our free decking calculator

Length (Meters)

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You will need

0 3.66m boards

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Composite Decking FAQs

What are the main benefits of composite decking?

Alpha Decking's WPC decking needs far less maintenance and in most circumstances none compared to traditional wood decking options. The plastic content in our decking means our boards are resistant to rot and damp, and are extremely slip resistant with no warping or cracking. WPC decking will also never need to be sealed, stained or painted saving you £1000’s over your decking’s life span.

What does the 15 year warranty cover?

Alpha Decking's 15 year warranty protects against warping, cracking, splitting, rotting and fungal decay caused by manufacturing defects, when subject to normal use. You can find the full warranty here.

Will my decking colour fade?

Over the first couple of months after installation you will notice your decking go through a weathering process, like anything left outside, due to UV exposure and naturally occuring tannins in the wood part of the boards being exposed to UV where the colour will start to become slightly lighter (typically around 10-20% depending on exposure and time of year) including a slight reduction in the wood grain, this will normally be most noticeable during the first 2 months exposure to UV light. This process can happen quicker or slower again depending on time of year and the amount of UV exposure the boards get. E.g in Winter this may happen over 4-5 months in Summer 1-2 months.

Please do not worry as this is completely normal and will generally start to stabilise after this initial period. Over the coming years once the product has stablised you may see a much slower reduction in colour as it's exposed UV light but is in most cases unnoticeable to the eye.

We have a picture graph below to give an example and a general representation of colour changes after 2 months outside exposed to UV light. Please note we have tried to accurately capture the colours but different lighting, angles and cameras and of course actual UV exposure means this may not be exactly how all boards will look after 2 months and is only suitable for this example. Colour change will vary across colours and batches.

Will I see the fixings?

No, you won't. Our decking boards have seamless installation with hidden fixings.

How do I know how much decking I will need?

To work out how many decking boards and other fixtures and fittings you will need you will first need to take your measurements where you would like the decking to go. You can put these measurements into our online price calculator which will automatically work out what you need and allow you to easily checkout online. If you need any extra assistance you can always call our sales team on 0203 011 1661 or email info@alphadecking.co.uk

What colours do you have available?

We have 5 amazing colours to choose from. Our beautiful deep anthracite, ever popular grey, traditional teak and majestic oak and our new oyster beige colour boards.

Order your FREE Composite Decking Sample Box

Get a real feel and see the quality for yourself. Receive your sample within 2-3 working days. 1 Sample box per customer.
Includes all our 5 colours Grey, Anthracite, Teak, Oak & Oyster
£ 0.00 
Buy now

Additional items you may need

The following products are all compatible with our Aspen Range of Composite Fencing

Additional items you may need

The following products are all compatible with our Willow Range of Composite Fencing

Additional items you may need

Alpha Composite Decking is a wood-plastic composite decking (WPC ) that has a natural beauty and the feel of real wood. Choose natural looking woodgrain Alpha Composite Decking for an authentic alternative to timber decking without the maintenance.

It is engineered from an innovative composition of 60% FSC® certified wood reclaimed from post-industrial manufacturing and 40% recycled High Density Polyethylene. Using recycled wood polymer construction makes it so much more durable than timber. The low maintenance, life-proof durability and weather-resistant qualities are just some of the reasons why it is perfect for your decking garden.

All our composite decking is UV protected meaning it is durable under UV light. Scrubbing and staining your decking every year is a thing of the past with composite wood decking. Alpha decking comes in 5 natural shades that resists and slows down fading caused by air-pollutants and weather exposure. Our decking comes with an up to 15 year limited residential warranty against splits, splinters, rot and fungal decay. This low maintenance solution is therefore the perfect choice for any commercial space or residential garden deck.

You'll find our composite decking to be extremely resilient, and it can be used for simple garden projects or complex landscaping projects. Clever concealed fixings give a neat flawless finish which can be installed quickly and easily making Alpha composite decking the ideal choice.

We can supply composite decking throughout most of the UK and whether you’re a property owner looking to improve their garden or a tradesman looking for ongoing supply for your projects, get in touch.

Garden with Composite Decking

Alpha Composite Decking is a wood-plastic composite decking (WPC ) that has a natural beauty and the feel of real wood. Choose natural looking woodgrain Alpha Composite Decking for an authentic alternative to timber decking without the maintenance.

It is engineered from an innovative composition of 60% FSC® certified wood reclaimed from post-industrial manufacturing and 40% recycled High Density Polyethylene. Using recycled wood polymer construction makes it so much more durable than timber. The low maintenance, life-proof durability and weather-resistant qualities are just some of the reasons why it is perfect for your decking garden.

All our composite decking is UV protected meaning it is durable under UV light. Scrubbing and staining your decking every year is a thing of the past with composite wood decking. Alpha decking comes in 5 natural shades that resists and slows down fading caused by air-pollutants and weather exposure. Our decking comes with an up to 15 year limited residential warranty against splits, splinters, rot and fungal decay. This low maintenance solution is therefore the perfect choice for any commercial space or residential garden deck.

You'll find our composite decking to be extremely resilient, and it can be used for simple garden projects or complex landscaping projects. Clever concealed fixings give a neat flawless finish which can be installed quickly and easily making Alpha composite decking the ideal choice.

We can supply composite decking throughout most of the UK and whether you’re a property owner looking to improve their garden or a tradesman looking for ongoing supply for your projects, get in touch.

Garden with Composite Decking

Composite Decking FAQs

What are the main benefits of composite decking?

Alpha Decking's WPC decking needs far less maintenance and in most circumstances none compared to traditional wood decking options. The plastic content in our decking means our boards are resistant to rot and damp, and are extremely slip resistant with no warping or cracking. WPC decking will also never need to be sealed, stained or painted saving you £1000’s over your decking’s life span.

What does the 15 year warranty cover?

Alpha Decking's 15 year warranty protects against warping, cracking, splitting, rotting and fungal decay caused by manufacturing defects, when subject to normal use. You can find the full warranty here.

Will my decking colour fade?

Over the first couple of months after installation you will notice your decking go through a weathering process, like anything left outside, due to UV exposure and naturally occuring tannins in the wood part of the boards being exposed to UV where the colour will start to become slightly lighter (typically around 10-20% depending on exposure and time of year) including a slight reduction in the wood grain, this will normally be most noticeable during the first 2 months exposure to UV light. This process can happen quicker or slower again depending on time of year and the amount of UV exposure the boards get. E.g in Winter this may happen over 4-5 months in Summer 1-2 months.

Please do not worry as this is completely normal and will generally start to stabilise after this initial period. Over the coming years once the product has stablised you may see a much slower reduction in colour as it's exposed UV light but is in most cases unnoticeable to the eye.

We have a picture graph below to give an example and a general representation of colour changes after 2 months outside exposed to UV light. Please note we have tried to accurately capture the colours but different lighting, angles and cameras and of course actual UV exposure means this may not be exactly how all boards will look after 2 months and is only suitable for this example. Colour change will vary across colours and batches.

Will I see the fixings?

No, you won't. Our decking boards have seamless installation with hidden fixings.

How do I know how much decking I will need?

To work out how many decking boards and other fixtures and fittings you will need you will first need to take your measurements where you would like the decking to go. You can put these measurements into our online price calculator which will automatically work out what you need and allow you to easily checkout online. If you need any extra assistance you can always call our sales team on 0203 011 1661 or email info@alphadecking.co.uk

What colours do you have available?

We have 5 amazing colours to choose from. Our beautiful deep anthracite, ever popular grey, traditional teak and majestic oak and our new oyster beige colour boards.

Composite Fencing FAQs

What are the main benefits of composite fencing?

Alpha Decking's wood plastic composite (WPC) fencing needs, in most circumstances, needs nearly zero maintenance compared to traditional wood fencing options. You can say goodbye to yearly re-staining, re-painting and panel repair saving you time and money year after year.

Our Composite Fencing Panels are made from 60% recycled wood fibres and 40% recycled plastic and is inherently stronger, more durable, water and weatherproof being able to cope with high amounts of wind, rain, sun and other outdoor elements and will not warp, crack or splinter.

We know and understand that composite fence is more expensive than traditional wood as an initial investment, but over the lifetime of your new composite fencing you'll be saving time and money vs wooden fences.

Can fence panels be cut to size?

Yes they sure can. Composite products can be easily cut to the required size using all your usual woodworking tools.

What does the 15 year warranty cover?

Alpha Decking's 15 year warranty protects against warping, cracking, splitting, rotting and fungal decay caused by manufacturing defects, when subject to normal use. You can find the full warranty here.

How do I install composite fencing?

You have 2 options. Installation using our composite fence posts or installation using our composite concrete post inserts which easily slot into your existing concrete posts. You can choose your option when purchasing your composite fence panel set.

Our fence posts have channels where the groove can be cut to size. The fence panels then easily fit together using a tongue and groove system making your fence up to your desire height.

How do I know how much fencing I will need?

If you need any extra assistance you can always call our helpful team on 0203 011 1661 or email info@alphadecking.co.uk.

What colours do you have available?

We have 5 amazing colours to choose from. Our beautiful deep anthracite, ever popular grey, traditional teak, majestic oak and our new charcoal colour slats.

CASH ON DELIVERY

Speak to a member of the team if you would like to pay for your order cash on delivery.

Please note an online deposit paid via card will be needed.

If you wish to pay by card all card payments must be made securely online.
If you'd like to continue paying by card please click here

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