Millboard Fixings

  • Separate Millboard pdf for full details
  • Storage & handling guidelines
  • Joist spacing between 300mm & 400mm
  • Advice on board colours & variation
  • Fixing with Durafix stainless screws
  • Cleaning boards of cement or lime stains
  • Millboard edging recommended for decks


Product Details

Millboard composite decking is a high-end product that deserves quality fixings to get the best out of the product.  Millboard produce a selection of decking supports made from “Plas-Pro” which is made using  100% recycled plastic. The dense Plas Pro is impervious to water ingress and will not rot, swell or split like wood which helps reduce maintenance time and costs.  It is an ideal product for installations near water and damp environments including jetties, fishing platforms, roof terraces and boardwalks.  We also carry a range of plastic-lumber as an alternative.

For laying 45º to the joist, reduce the joist centres to 300mm for residential and 240mm for commercial use. Always leave a 10mm expansion gap between ends of bearers and joists.
To install Plas-Pro frame solutions, drill the fixing holes oversize to allow the material to expand. Posts should always have a minimal of a third of their length in the ground, subject to a minimum of 400mm in the ground. Cuts must always be positioned over joists.

Plas-Pro products are complementary to Millboard’s terrace pedestal products and together present a “non-rot external flooring system”.  From 2016 the Plas-Pro components available are 30mm x 60mm (2.8 metre), 50mm x 50mm (2.4 metre), 50mm x 125mm (3.0 metre) and 100mm x 100mm (3.0 metre) posts.  These posts and bearers can be used for freestanding installations or for balcony, garage & flat roof top installations along with Millboard pedestals and joist shoes.

The adjustable pedestals are ideal for podium decks and terraces, they are designed to allow pipe work and services to be laid beneath Millboard, and also to improve air circulation and preventing rot. The weight of the joists is spread evenly, creating a sturdy support, and they’re available in incremental adjustable sizes up to 300mm tall, giving you complete control of the height of the area. For a domestic or light commercial installation they should be spaced every 600mm, for a commercial install they should be every 400mm

Millboard Durafix stainless steel fixings are a good investment, there is no need to pre-drill or countersink, just screw straight in. This is not the case with cheaper, lower spec stainless screw fixings. Durafix Trimhead Fixings are made from A2 Stainless Steel and are available in 50mm and 60mm lengths in boxes of 250.  Both sizes are 4.5mm in width and include the appropriate sized Torx bit. Providing these screws are correctly fitted the Lastane® coating material on every Millboard flexes back over the fixing, leaving a virtually indistinguishable mark and creating a cleaner finish.

Use the Millboard Touch-up Coating to match and blend in the exposed ends. Finally, if the Millboard boards get marked during installation then  wash with hot, soapy water and a firm broom straightaway. To remove any cement and lime-based stains, Millboard recommend using Geocel Brick & Mortar Cleaner. Test a small area first and follow the mixing instructions, leaving for five minutes before washing off with soapy water.

Phone to order

01803 813 803

Lines open 7:30 - 17:00 Mon - Fri

Delivery details

Usually within 1-2 working days

At Southern Timber we offer a kerbside delivery through the Torbay, Teignbridge, Exeter, South Hams and Plymouth areas. While most deliveries are free sometimes they may be chargeable depending on location and the total value of the order.

We offer next day delivery, when required, for our normal delivery days (Monday to Friday) and areas. Customers are requested to phone in before 12.00pm on the day prior to delivery with their complete product listing, delivery address and payment details.