Decking timber
Red grandis is a plantation eucalypt widely used in South Africa for decking. It sits between treated pine and the dense imported hardwoods in how it is discussed on site.
Overview
Eucalyptus grandis — sold as grandis or red grandis — is a lighter eucalypt hardwood than sugar gum or the tropical imports. It is a common Cape Town decking board when the brief wants a timber look without specifying Balau or Massaranduba.
At a glance
Our approach
Often specified for suburban Cape Town decks, Winelands gardens and hospitality terraces that will be coated and looked after. Harsh coast and heavy public abrasion may push the conversation toward denser species or a different system.
Fresh boards are pinkish to light reddish-brown. The timber is easier to work than Ipe or Massaranduba and more “hardwood” in appearance than pine. It is also more prone to movement and weathering than the densest imports. Some merchants group grandis with saligna; they are related eucalypt stories, not identical boards. Confirm what is actually being quoted. Deckspertz does not publish a lifespan, a rate card, or a maintenance-free claim for this timber.
Grandis is a practical Cape Town decking timber for many Bishopscourt, Durbanville, Stellenbosch and similar gardens where the deck can dry and the owner will recoat. On Camps Bay, Kommetjie or Hermanus sites it can still be used if detailing, fasteners and finish match the salt and wind — it is not automatically the wrong timber, and it is not automatically the right one. Roof decks and pool edges need the same moisture discipline as any eucalypt floor.
Uncoated grandis greys and the surface fibres raise. Coatings wear on traffic and on the sunniest elevation first. Boards can cup if the underside stays wetter than the top. Checking is possible in Cape UV. It will not hold a factory-fresh pink. Compared with pine it often looks more “hardwood” for longer; compared with Balau or Ipe it usually asks more of the maintenance conversation.
Red grandis is included because it is commonly used for Cape Town decking. It is not named on a completed Deckspertz project page at the time this guide was written. Species, grade, coating and substructure are specified together. Supply in Cape Town changes. This page is a species guide, not a stock list.
Related pages
Questions
They are related eucalypt products and are sometimes mixed in trade talk. Ask for the actual species and grade on the quotation. This site keeps separate pages so the names stay distinct.
It is a different timber: typically harder and a different colour. Cost, coating, movement and availability still have to be compared for the site. No ranking or price is published here.
Start a project
Share the suburb, how the outdoor floor will be used, and photographs if you have them. Availability of Red grandis is checked for the job.
Phone 021 001 2097, WhatsApp +27 63 970 7843, email [email protected].
Start a timber conversation Call Deckspertz WhatsApp Deckspertz
