Technical Information

Wideboard Overlay

Why it differs to standard profile wide board flooring
When you look at a finished floor you will see one significant difference with Hurfords Wideboard Overlay flooring and that is the absence of top nail fixing. You see each product has been specifically manufactured with a different purpose in mind. So what exactly are the design differences?

Why do Hurfords manufacture both profiles?
Standard profile wide boards are generally manufactured in longer lengths more suited to installation over joists and where some bow and spring can easily be removed.

Wideboard Overlay has been specifically straightened and is manufactured to shorter lengths to provide a straighter board with less bow and less spring, particularly suited to overlay installation. In fact all aspects of manufacture - sawing, drying, post drying and machining have all been modified to produce this product.

Standard profile wide boards due to their extra thickness are more prone to some cupping and movement at manufacture.

Wideboard Overlay with its more precise manufacturing processes provides a product that is less prone cupping and movement at manufacture.

Standard profile wide board has a central tongue and groove.

Wideboard Overlay has the tongue and groove machined off centre to provide the same wear thickness as standard profile wide boards.

What are these floors designed to be fixed to?
Standard profile wide boards are manufactured for fixing to joists or 35 mm thick kiln dried battens.
Wideboard Overlay is designed for direct fixing to plywood and particleboard.

What fixing methods are appropriate to each profile?
Standard profile wide boards are designed to be top (face) nail fixed.
Wideboard Overlay is designed to be secretly fixed with adhesive and mechanical fixings.

When height is important.
Standard profile wide board floors when fixed as recommended to battens over a slab have a finished height of 54 mm.
Wideboard Overlay floors on plywood over a slab have a finished height of 29 mm.

So don’t put a square peg in round hole.
Use standard profile wide boards for top nailing to joists, the purpose for which they have been designed... and... when fixing over plywood and particleboard sub-floors, be sure to use Hurfords Wideboard Overlay. And don’t forget that they key to this product lies in the way it has been manufactured.

Installation of Decking
Decking installation is generally direct to joists with the boards usually nailed or screwed into place. However more recently other systems have been introduced which enable the secret fixing of boards. Decking boards come in random length packs with smaller lengths no shorter than 900mm so they can be supported by two joists and board ends are butt joined over the joists.

Installation of the decking is then by two nails or screws through the top of the boards at each joist crossing. Some of the newer secret fixing system utilise adhesive on the joists prior to board fixing. The distance between the centre of joists is normally up to 450mm.

If decks are close to the ground then materials need to be of higher durability and boards need to be spaced a little further apart to accommodate the reduced ventilation. In such instances it is also necessary to have good drainage and to ensure no pooling of water beneath the deck.