Cumaru 90 x 19mm

Cumaru is renowned for its outstanding colouration. Whilst boards tend to range from light brown through to dark honey, sparks of orange and dark golden brown can also feature. When the different shades are fitted together, an impressive, contemporary, rich, dark and unique deck is achieved. This colour variation is widely sought after. Cumaru like many other species can be prone to worm hole and Raised Grain which are natural defects and acceptable within grading. If, however, you are you are looking for a more uniform finish, we recommend one of our other decking timbers.

Cumaru is an extremely dense and durable hardwood, that is naturally resistant to insect and fungal attack.

Cumaru is renowned for its outstanding colouration. Whilst boards tend to range from light brown through to dark honey, sparks of orange and dark golden brown can also feature. When the different shades are fitted together, an impressive, contemporary, rich, dark and unique deck is achieved. This colour variation is widely sought after.

Cumaru like many other species can be prone to worm hole and Raised Grain which are natural defects and acceptable within grading. If, however, you are you are looking for a more uniform finish, we recommend one of our other timbers.

Whilst Cumaru is an extremely stable hardwood, we recommend that you leave a minimum 4mm gap between each board (5-6mm for 145mm wide boards). Being a natural product there will be some expansion and shrinkage in certain climates, but this is not likely to be noticed by the human eye.

Please note that as hardwood specialists, we do not stock softwood for sub-frames. We recommend that you source this from a standard timber merchant. We recommend sealing the cut ends of your boards with an end grain sealer (beeswax works beautifully).

Decking oil

The most common finish for any hardwood deck. This product contains UV filters to delay the silvering process that strong sunlight causes in any hardwood. Balau can be fitted using stainless steel deck screws (always pre-drill hardwoods) and using hidden fixing systems *boards edge grooved to accept hidden fixings*

Face Screwing: The traditional method. Simply screw through the face of the board into your sub-frame, plugging the hole if required. We recommend 400mm centre to centre joist spacing.

Deckwise Hidden Fastenings: allow you to lay your hardwood decking boards without the need for unsightly face screws. Each Deckwise clip screws into your sub-frame and then slots into the side of adjoining boards. Deckwise Clips automatically provide the 4mm spacing.

We can pre-groove your decking boards for use with Deckwise or you have the option of using a biscuit jointer on site.

We recommend installing your decking boards with the hardwood decking wrench. This is a self-locking deck board straightening tool that can be used to hold bent boards straight whilst fasteners are installed.

We also offer a hire service.

Simply screw through the face of the board into your sub-frame. Always Pilot Drill before fitting screws and drill 2mm oversize holes to allow for some expansion.
We recommend 4mm gaps between the boards (for tropical hardwoods) and 6mm gaps between the oak and softwood decking boards.
We recommend 400mm centre to centre joist spacing. Each hole can be plugged. We do not recommend that Hidden Fastening systems are used with oak decking.