
L.L. JOHNSON LUMBER MFG. CO.	& JOHNSON'S WORKBENCH
EVERYTHING FOR THE	WOODWORKER

Brazilian Redwood (Massaranduba) Installation Instructions

Handling & Storage - Massaranduba is dried from 12 to 20% moisture content. As the material adjusts to local weather conditions, it will expand in width about 1/8" if the moisture content is closer to 12%; or, if the moisture content is closer to 20%, it will shrink about 1/8". Like Ipe', give Massaranduba a chance to acclimate to current humidity levels before installation by storing in a cool, dry place, out of direct sunlight.
Installation - Like Ipe', your deck should be designed to stand at least 24" above the ground and be open on at least 3 sides to promote adequate cross ventilation. 1x4 and 5/4 Massaranduba decking may be installed on 16" o/c. joist systems. 5/4 material also may be installed on 24" o/c. Installing decks with a diagonal pattern may require narrower joist spacing. When installing, allow a minimum 3/16" space between 4" planks and 1/4" space between 6" planks. This promotes air circulation, allows drainage, and leaves room between the boards for shrinkage and expansion. The average rate of shrinkage is approximately 1/8" on 4" wide boards and 3/16" on 6" wide boards.
Cutting - Carbide-tipped saw blades and drill bits are recommended when cutting Massaranduba. Before fastening, always pre-drill a pilot hole close to the actual screw or nail diameter.
End Sealing - Massaranduba is end-waxed. Any cuts made on the planks must be immediately resealed with a clear aqueous wax end sealer to help reduce checking. We recommend "Anchorseal" by UC Coatings.
Fastening - Stainless steel fasteners are recommended because of superior corrosion resistance, maximum holding power, and ease of use. Always pre-drill a pilot hole before driving screw fasteners in any application and countersink screw fasteners when face screwing deck boards. There are also various hidden-type, under-mount or clip systems, that may be used without causing unsightly surface punctures; and, eliminate the potential for water to pool or stand on the surface, leading to wood rot and deck failure. The DECKMASTER® hidden deck fastening system is a great example. Make sure you buy the appropriate size DECKMASTER® bracket for the deck boards you are installing, pre-drill and ask us for more information!
Finishing - After finishing your deck, clean the surface and wait at least 2 days to apply a thin coating of high quality penetrating oil-based sealer with UV inhibitors that limits checking and color fading. It is recommended that you test any product chosen on several sample boards to determine compatibility.
We recommend applying quality penetrating oil finish with a UV sun block after completing your deck. U.V. Plus by Messmer's or Penofin's Bronze Label Hardwood Formula finish are excellent products that will keep your wood looking its best. Within 3-6 months, follow up by applying another coat or when the Massaranduba looks dry or weathered. These initial applications help saturate the wood fibers, adding protection to preserve your deck and make "maintenance" coats less frequent. Over time, apply this finish periodically to maintain the natural color. If you prefer, Massaranduba will weather naturally without any oil to a silver gray patina over a period of time, thereby eliminating any finish maintenance. We do recommend that you at least apply an initial oil finish to your deck after completion and seasoning. Please feel free to call us with any questions.