Questions tagged [pressure-treated]

Wood that has been treated to resist rot and insects, and thus can be used outdoors. Use in conjunction with questions about the wood and its uses. Please include any relevant project tags as well (such as [fence] or [deck])

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21 views

Decking splitting before installation - how do I stop this?

Background: I deliberately ordered extra decking assuming that I would possibly ruin one, cull some, and perhaps a few might split, warp or cup as they dried. Since then, all but a couple of the ...
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44 views

White mold or fungus on PT lumber

I'm building a wooden fence and have a number of 4x4 pressure treated lumber stacked neatly in my garage. I've been pulling posts from the stack as I work on the fence over the last 4 weeks. When I ...
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3answers
87 views

Can pressure treated wood be buried in concrete?

I was planning a relatively simple, 6x8ft "2-post" pavilion, just a small structure to provide protection to a small bench. This design would require to bury the wood into the concrete ...
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27 views

How can I quickly seal wet pressure-treated plywood?

I am replacing the floor in my camper and want to use 3/4" pressure-treated plywood but I want to apply some water sealer before I lay it down. Is there a way I can do this without waiting a lengthy ...
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2answers
51 views

Treehouse ladder - 12ft and corrosion resistant from pressure treated wood?

I'm designing an elevated deck/swingset combo and am trying to figure out how I'm going to build the ladder. But I've got a couple of challenges. One is that the main posts will be ground-contact ...
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54 views

Can I combine 2x4 lumber to build posts for barn?

Designing a barn/out-building for my off-grid place. Essentially this is an open structure (think of sticks with a roof), but part of which is a shed. The problem is, the longer poles will need to be ...
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1answer
22 views

Painting Pressure Treated Wood | Outdoor Steps Application

I am needing to rebuild some stairs (3 steps), and the previous owner has a great colour scheme going on the house, and I want to maintain that. Now, my wife and I like to do builds/projects that are ...
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53 views

Is there a test to determine if a nail is galvanized or not?

I bought a nailer which came with some old nails that I'm going to use for a shed floor into pressure treated wood. As you can see, they kinda look galvanized. They have that grey patina. But other ...
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2answers
172 views

Is it normal for pressure-treated lumber to warp?

I recently bought some pressure treated yellow pine for building some window boxes. After building them, I sealed them with a product that would protect the wood for 3-4 years, according to the can. ...
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1answer
63 views

replacing pressure treated 1x4 boards on roof with non-pressure treated white pine - OK?

On an 85 year old house there are pressure treated 1x4s running horizontally across the rafters, and the plywood sheathing is laid on top of those 1x4s. I have to replace some of these 1x4s but there ...
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5answers
1k views

Should bottom wall plates in a basement be treated lumber?

Question for those who are well versed in framing and then maybe some code as well. I got into a discussion the other day between a couple other trades, they were suggesting I was wasting my time ...
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86 views

Can stainless steel or galvinized screws be used indoors on non-pressure treated wood?

I assume yes and there is no harm or downside, besides these screws being more expensive than non-coated screws.
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433 views

Galvanized nails for ACQ treated lumber = must be hot dipped, or not?

We're having some construction done requiring treated soleplates on concrete slab. As such, galvanized nails were used. However, they don't appear to be hot-dipped. My understanding (going back ...
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366 views

How do I protect the front side of a wood retaining wall?

I have a wood retaining wall made of 3x12 pressure-treated boards similar to the one pictured here. The backside has MiraDrain and 3/4" drainage rock. I have an excess of earth to manage and one ...
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3k views

Are pressure-treated posts that have been submerged for a few days ruined?

I dug holes for four 8' 4x4 posts, and had the posts positioned and plumbed vertically in the holes, but had to leave for a couple days before I could concrete them in. In the meantime, storms came ...
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331 views

Will 2x4 remain straight?

I was able to straighten a slightly warped 10-foot piece of pressure-treated wood with clamps. Will it warp again? If so, is there anything I can do so that it doesn’t warp? This 2x4 is being used ...
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51 views

Best way to make sturdy Fence post for aluminum sign?

I'm looking at putting some posts up for No-Smoking signs at a local club frequented by a couple hundred kids a weekend + their families. One guy recommended Treated lumber, but I heard it'll eat ...
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1answer
598 views

Concrete post base wood too tight

I'm using the Simpson PB66Z "Galvanized Post Base" to attach my pressure treated 6x6 to the footing. The wood seems to be slightly too large to fit such that the bottom of the post rests on the metal. ...
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3answers
66 views

Protect screws in joint and make it look nicer?

So this is what the joint looks like. It's solid, but as you can see, the screws are exposed so they'll be rusting pretty soon. Also, the joint looks horrible. It's PT wood. What can I buy to make ...
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1answer
42 views

Winterizing new wet-treated pressure treated pine deck

We’re in a townhome and replaced our small 2nd floor deck/porch with wet-treated pressure treated pine 3-4 weeks ago. We had to do it well in advance of the other units for safety reasons. There’s a ...
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2answers
109 views

I spend long time in picking lumber. What do you look for when selecting boards?

I typically spend very long time in front of the lumber aisles inspecting boards. Many times I end up not getting anything after all because I thought all boards are imperfect. I see pros spent few ...
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1answer
384 views

How to mate two pressure-treated 2x6s together?

I want to mate two 2x6s pressure-treated boards (span = 8') so that I can use them as a beam for my ground-level floating deck. Should I use a construction adhesive? Anything special given that the ...
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2answers
943 views

Prevent cupping and splitting of wet PT deck boards?

Building a deck now in hot South Carolina. I purchased #1 premium deck boards very nice appearance no knots etc.. The boards are very wet and even though I was sure to put them in the bark up ...
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48 views

Are there any health concerns around treated wood?

Last weekend I received a pallet of freshly pressure treated (still wet) green Wolmanit feather-edge cladding. I have started to apply it to various buildings. Obviously I am handling it with bare ...
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703 views

Substitute for Pressure-Treated 2x3

I'm trying to replace a few sections of rotted bottom plate in my basement. I want to use pressure-treated lumber as it will be in contact with the concrete on 2 sides (and it still occasionally gets ...
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69 views

Department store PT GC lumber

I'm using pressure treated, ground contact lumber like this one bought from Home Depot for an outdoor project in my backyard. Parts of the lumber are buried underground, and some of the buried ends ...
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2answers
2k views

Which wood fence boards will last longer, pressure-treated-lumber or non-treated lumber that has a treatment applied after the fence is built?

I just heard of the capability to build a fence with untreated lumber and to apply a disodium octaborate tetrahydrate solution after installation. The alternatives I have been considering are AWPA ...
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3answers
9k views

Should I use Pressure Treated Wood in a basement?

Home inspector once told me my basement has a slightly high moisture reading. No mold, dampness or musty smell. I am building an entertainment built-in out of lumber and MDF. Should I use pressure ...
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1answer
277 views

Should raw timber be treated for use as in-ground posts?

I've got some grape vines that I need to re-build a badly designed trellis around. Im considering using some felled timber from my back yard. The advantage is that I could use much larger, cheaper ...
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1answer
594 views

how to treat regular lumber for outdoor use

What are the solutions to stain lumber for outdoor use, except buying pressure-treated wood? What I want to do is take the old lumber, which is still in good shape, but turned gray because of the ...
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1answer
519 views

Preserve treated wood?

What should I use, if anything, to preserve these steps made of treated wood? These are on my townhome's back porch. Two of the steps are directly exposed to weather. They were filthy but cleaned up ...
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2answers
2k views

Using pressure-treated wood to make a sandbox

I'd like to build an sandbox for my toddler children. I'd like it to be inexpensive and low-maintenance (no repeated annual sealing of wood, etc.), and it seems that pressure-treated (as opposed to ...
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1k views

Should I Let my PT Fence Dry Before Installing

I'm installing 300+ LF of fence in the next month or so and am getting ready to start ordering my materials. My main question is should I dry out my PT lumber before installing, posts rails and ...
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1answer
505 views

pressure-treated ramp to storage shed [duplicate]

I am a home owner & have just replaced the sloped ramp to our storage shed with 1/2" PT 2 weeks ago. We live in the Atlanta, GA area so temps have been 90s for highs, with showers frequently. 1) ...
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2answers
93 views

Do I need to treat the ends of PT lumber?

I'm going to be building a retaining box for a gravel pad using 6x6's - 0.16 lb./cu. ft. MCA pressure treated lumber. The dimensions of the box matched up with available lengths at the lumber yard, so ...
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1answer
817 views

Can I use construction screws to pull together bowed joists?

I am building a small (14'x12') detached deck to be placed directly on the ground with some gravel under it. I am using 4x6 pressure treated boards (UC4B) for outside frame. I intend to use 6" ...
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1answer
466 views

Best way to suspend beam end from cable

I'm about to buy hardware for a treehouse project, and am wondering about the best way to attach 3/8' galvanized cables to a 4x10 PT beam. The cables need to be attached near the ends of the beam to ...
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1answer
896 views

Are railroad ties suitable for a retaining wall under tree canopy?

This video shows a sharp cliff near my house that leads down to a stream. The drop is about 20 feet. I would like to build a 4' high retaining wall right around where you see a stack of dead branches. ...
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1answer
355 views

Is a metal post base needed on a concrete pier?

I'm building a backyard storage shed that will be supported by two 4x6x16' pressure treated rails laying on concrete piers. The 6" side will be flat against the pier. At the building supply store I ...
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4answers
8k views

How to make pressure treated wood look old quickly

We are adding a porch onto our old tobacco barn and are using pressure treated lumber. We started in July to prepare for my daughter's outdoor wedding in late October. I would like for the porch wood ...
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1answer
164 views

Band board in contact with ground- how to waterproof?

We recently bought a home built in 2004. During the inspection it was noted that there is what is assumed to be pressure treated wood "band board"or a ledger board (?)at the rear of the home adjacent ...
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682 views

Type of Lumber for carport load-bearing post replacement?

So I need to replace the 5 load-bearing posts on my carport due to visible rotting. Do you recommend using the standard Southern yellow Pine Pressure treated 4x4 lumber I see in your typical big box ...
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1answer
248 views

How should pressure treated wood post foundations be protected?

I am planning on building a 3.5 by 4m garden shed/workshop, and I am thinking that I'll construct it on pressure treated wood post foundations. I have some 100x100mm pressure treated pine posts. My ...
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2answers
109 views

Replace permatreated 4x4 Hand rail post on step where concrete holding it has cracked?

I bought a home 8 months ago where the deck handrail was planted at the edge of a concrete step as a 4x4 on the bottom step. The concrete at the edge of the step has cracked, the hand rail is wobbly, ...
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2answers
186 views

New Wooden decking. To stain or not to stain [duplicate]

I had new wooden decking installed on my balcony. The guy that did the job says it doesn't need stain because the wood is already treated: http://www.diy.com/departments/premium-brown-softwood-deck-...
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3answers
6k views

What nails to use for PT wood?

I'm re-framing my first floor and using PT wood everywhere where there is a possibility of area being flooded. PT wood is your typical 2x4(s) from Home Depot MCA - micronized copper azole ...
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1answer
26k views

How deep in ground should I install 4x4 PT fence posts?

I'm installing some 4x4 Pressure Treated 8' Tall Fence Posts for a chicken run. I want to have at least 7' tall fence, and am wondering if the 1' sunken depth is adequate. I have read conflicting ...
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1answer
785 views

Is it safe to use pressure-treated wood for a workbench in my shed?

I have some leftover PT wood from building a platform for my shed. I'd like to use it to build a frame for a worktable that I can place inside that shed. It will stay dry in the shed, but the shed ...
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1answer
1k views

new railings - should I use cedar or treated pine?

I'm replacing the railings on a balcony and have a choice between using cedar or a pressure treated pine. The railings will be painted, so will end up looking the same in either case. I'm looking for ...
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424 views

How can I pressurize stain into wood?

I'm thinking about how to stain the railing on my deck. What I have is the same design as the last three pictures on this page. I'm going to take the glass out before I stain, so there is some ...