Gronodec is range of eco-friendly composite decking boards that are made out of wood from sustainably managed sources combined with 100% recycled plastic - which means they are extremely hard wearing and very gentle on the environment.

Our Gronodec Premier range of composite decking is easy to install, very low maintenance and extremely hard wearing. It won’t warp, splinter or rot and it’s both slip and stain-resistant.

Our Gronodec Rustic range redefines superior quality with its combination of the ultimate in high-performance durability found in Gronodec Premier, with the unique appearance of beautiful naturally-aged wood.

Available in wide variety of naturally inspired colour schemes, Gronodec eco-friendly composite decking is weatherproof and comes with the added benefit of a 25 year warranty.


Create stylish yet practical outdoor living spaces that can be enjoyed all year round - whatever the weather.

If you need any advice on choosing the best product for you then please call us on 0161 877 0929.

So, how many Gronodec boards do you need?


Calculate the total area to be covered (length x width):

For example: 5.49m x 5.49m = 30.1401 square metres

Multiply this figure by 7

In our example: 30.1401 x 7 = 210.9807

Multiply the result by:

1.15 (if ordering Gronodec Premier)
1.2 (if ordering Gronodec Rustic)

In our example: 210.9807 x 1.15 = 242.627805

Divide this number by 3.66

In our example: 242.627805 ÷ 3.66 = 66.29175

Round this figure up to the nearest whole number

In our example: 66.29175 rounds up to 67

So in our example the total amount of Gronodec Premier boards needed = 67 boards

To download a PDF containing the technical data sheets for our Gronodec product range please click on the link below:

Please click here to view our product warranties.

Eco-friendly • Easy to install • Hard-wearing • Low-maintenance • Highly realistic

Pet-friendly • Child-friendly • Weatherproof • UV Stable • Fade resistant

Flame retardant • Stain resistant • Scratch resistant • 25 year warranty

Free nationwide

Download the

install guide


Here you can conveniently order any product from our Gronodec range in a wide variety of quantities to suit any type of installation. Don't forget to order any accessories such as Gronodec Starter Clips and Screws, Centre Clips and Screws and Gronodec Edging/Nose Boards.

All products come with FREE DELIVERY and are exclusive of VAT.


Once you have placed your order be sure to visit the Gronodec Installation page, where you can download the install guide.






a.   Unit 5, Guinness Road Trading Estate, Manchester M17 1SB

t.   +44 (0) 161 877 0929

e.  sales@grono.co.uk

Opening times - Monday to Friday:  8am - 4.30pm

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