a pressure treated wood deck needs special consideration when staining or sealing it. this type of lumber has preservatives including arsenic that are forced deeply into the wood fibers to protect against rot, mildew, and termites.
pressure treated wood is first kiln-dried in order for the preserving chemicals to properly penetrate the wood. i doubt you will see much shrinkage after it's installed. but you want to allow for water drainage. what i do is slide 16d nails between the planks for spacing, secure it to the joists, then move them to the next plank.
mildew is common on treated wood because the chemicals used for pressure-treating retain moisture. clean off the mildew by scrubbing with a solution of 1/2 cup of chlorine bleach per gallon of water. rinse the wood thoroughly after the bleach treatment.
when to seal or stain pressure-treated wood. the best course of action is to test the surface yourself. splash some water on the deck boards. if it beads up, the wood isnt quite ready to be sealed. wait several days and test it again. when the water absorbs into the wood, its ready to seal or stain.
field-cut ends, notches, and drilled holes of pressure-preservative-treated wood shall be retreated in the field irc r502.6 and ibc 2308.8.1 bearing. the ends of each joist, beam or girder shall have at least 1 ½' of bearing on wood or metal except where supported on a 1'x4' ribbon strip nailed to adjacent studs.
leave gap: if the pressure treated wood has been kiln dried after treatment kdat , leave a 1/8' gap the thickness of an 8-penny nail between the boards when attaching, no gap: if the pressure treated wood hasnt been dried and is still wet with preservative, butt the deck boards together when
what spacing between boards on a deck? i am going to build a deck out of pressure treated lumber. i've read various opinions on the spacing between boards .some say to butt them because they will shrink .others say to leave the space of a nail between the boards.
pressure treated wood. staining slows down the effects of nature, but it will never win the battle. eventually, the grain of pressure treated wood boards will become so open and porous that they will need to be replaced. the general lifespan of a pressure treated wood deck is between ten to fifteen years.
before the wood was wet and shrunk considerably when exposed to about 1/4' from when it came to the jobsite and was installed. todays acq treated lumber doesn't have that shrinkage as it's treated differently. what i do on my pt decks is shake out the decking and use a 1 gallon paint stir stick from the home centers paint department for spacing.
when you are about 6-10 feet from the end of the deck, check the remaining distances from the edge. divide this distance by the width of the decking boards plus 1/8. you should try to end the decking with a full width board if possible. you can slightly spread or shrink the gaps for a perfect fit. cut a clean edge
i'm building a raised patio deck using pressure treated 2x6x16 acq treated wood. i need to have a gap between adjoining wood planks. i don't want any more gap than is necessary for the rain to run off. the wood i'm using is quite wet. salesman at home center wasn't sure of the amount of shrinkage.
types of lumber. among lumber commonly available in pressure-treated form for deck framing, douglas fir and southern yellow pine are strongest, but southern pine has more of a tendency to warp. hem-fir is a designation that includes hemlock, fir, and other species that grow in the same stands.
for many years, decking was primarily wood. people used redwood, cedar, pressure-treated pine and even some exotic hardwoods. wood has some beautiful natural characteristics, but also requires some maintenance. decking comes in many forms these days. there are over a hundred different man-made decking products on the market today.
the goal is to have about an 1/8-inch gap the diameter of an 8d nail between boards after the decking has dried to its equilibrium moisture content. if the decking is installed wet, as is often the case for pressure treated material, it is best to install the boards tight, letting gaps form as the wood dries.
building tips for pressure-treated wood: proper board spacing and sealing end cuts brought to you by wood, naturally lumbers natural beauty makes it an ideal choice for your next deck or outdoor project.
pressure-treated southern yellow pine meets the highest grading pressure-treated southern yellow pine meets the highest grading standards for strength and appearance. treated for protection against fungal decay rot and termites it is ideal for ground contact and a variety of general uses including exposed structures sill plates decks docks ramps and other outdoor applications.
pressure treated wood. wood can be impregnated with a variety of preservative chemicals to prevent rot and insect infestation in exterior applications like decks. several species of wood can be treated, but a regionally available species usually predominates in any particular locale.
most of the deck is 5 feet off the ground though some is only 2-3 feet off the ground yet there is a pressure treated enclosure around the deck, which has landscaping bushes in front of it. i live in central virginia so humidity, sun, etc.
4-in by 4-in pressure-treated lumber actual: 3.5-in x 3.5-in 5/4-in by 6-in pressure-treated decking actual: 1-in x 5.5-in deck screws; structural wood screws rated for pressure-treated lumber; railing post anchors; carriage bolts, washers and nuts for rated pressure-treated lumber; nails rated for pressure-treated lumber
i often stop by and learn a thing or two. i notice when they were building new deck, they did not leave any gap between planks. they were using pressure treated wood. two years later, the planks did shrink a lot, now it has 3/16' to 1/4' gap between planks.