Because Meranti Balu and Red Balau Decking is kin dried, there is almost no shrinkage. Like all woods though, it will absorb moisture. Make Sure to leave at least 1/4 inch between board sides to side to avoid buckling as the wood expands. Shrinkage/Expansion length wise is nil, so trim the ends neatly and butt together tightly.
For best results, drill pilot holes 3/4 inch from the end of the boards and at least 3/4 inch from the sides of the boards to minimize spitting. Boards should be glued to joists with a high quality Polyurethane glue and fastened with stainless steel screws, which should penetrate 1 1/2 inch or more into the deck joists.
Please make sure to follow your local building codes. It is very important to leave adequate ventilation under your deck, i.e. at least 18 inches from the ground.
Moisture and temparature, which vary greatly with local conditions, are the primary factors that affect the rate of decay. A deck that dries after wetting will last longer than one that stays damp. Wood deteriorates more rapidly in warm, humid conditions than in cool or dry conditions. Higher elevations are less favorable to decay than in warm, humid conditions than in cool or dry conditions. Higher elevations are less favorable to decay than low elevations.
Keep your deck free of leaf, pine needle and other debris buildup. These can retain water and clog drainage channels resulting in a deck that cannot drain and dry properly after wetting.
Periodically move planters, benches and other deck accessories to allow the deck under them to dry thoroughly.
After a year or so of use, simple maintenance will revitalize your Meranti Balu aor Red Balau Deck. Spring in particular is a good time to clean and refinish your deck. Use a high quality deck cleaner and follow directions carefully. Be sure to exercise caution in the event a power washer is used as excessive force with a power washer can damage any wood deck.
Once the deck is completely dry, apply high quality stain according to manufacture's directions. Application of a higher quality stain will generally result in a longer useful life for your deck.