See full version: What does pressure treated wood do aluminum
Aluminum has been the go-to flashing for decades, but contact with ACQ and CA preservatives corrodes the metal. Copper is ground into microscopically tiny particles and the manufacturers say the treated lumber is no more corrosive to aluminum building products than CCA lumber. [links]
Yes. Most of the new chemical treatments contain copper and should never come in direct contact with aluminum. Total failure caused by corrosion can occur in less than a year.
Beside this, will treated lumber hurt aluminum? here
Likewise, can you wrap pressure treated wood with aluminum? And because these new wood treatments are especially corrosive to aluminum, it's best to use vinyl or copper flashing, or to wrap the wood in a protective rubberized membrane. Allow treated wood to dry thoroughly before staining or painting. Test dryness by sprinkling the wood's surface with water. more
Does pressure treated plywood corrode aluminum?
ACQ and Aluminum Don't Mix. As the industry phases out wood pressure-treated with chromated copper arsenate (CCA), keep in mind that the high level of copper in the alternatives reacts with aluminum, causing corrosion. Aluminum never has been recommended for use with CCA.
We’ve been tracking the shortage since last summer, when a perfect storm of surging demand, supply chain disruptions, and reduced availability set off the biggest price jump ever recorded. Surging lumber costs might make composite and other alternative decking materials—normally far more expensive because they last longer—more appealing.
If, before the lumber shortage, the pricing of composite held you back—and you need a deck now—you could seize the chance to trade up to a material that resists staining, requires far less maintenance, and has long been viewed as a more premium product. We’ll have to wait for our final test results, though, to see how alternatives stack up against wood. [links]
“We have not had any deliverability delays and have inventory for quick turnaround times,” says Chase Moritz, director of marketing at Envision. “We’re able to react quickly and have been able to convert projects because of that.” [links]
In reality most production boats are not made with marine ply. They're built using exterior of some sort, and more and more new boats have no wood at all. Using exterior on your repair or modification is a pretty safe thing to do, especially if you follow the rules for encapsulating it in glass or resin.
Read about why the APA says:
Re: marine plywood. necessity or not?
i used marine grade on mine but once wrapped in fiberglass i dont' think it would really matter the grade. i also used 3/4'' because i wanted it strong.
Re: marine plywood. necessity or not?
Part of it depends on price and availability. Greenwood marine ply is made close by where I live so it's only $60 a sheet for 3/4" here.
Lightweight aluminum is better suited for installation on decks or in other areas where weight must be kept to a minimum. Wood is best suited to ground-based installation or installation on its own dedicated footers. Heavier wood pergolas are less prone to wind damage and minor damage can be quickly repaired by simply replacing the damaged boards. A strong wind can blow down or twist a poorly anchored aluminum model, often requiring replacement of the entire structure. more
Pergolas provide backyard shade and a support for vining plants while also adding a decorative element to the landscape. Both aluminum and wood varieties provide these benefits and can last for many years with proper installation and care. Choosing which option is best for your yard depends on personal preference and an understanding of the pros and cons of both materials.
Wood pergolas are generally less expensive in terms of materials, while aluminum pergolas have a higher material cost but lower labor cost. If you are building the pergola yourself, wood versions usually cost less overall but are more difficult to put together while an aluminum kit will cost more whether you build it yourself or hire out the assembly. Aluminum pergolas do have fewer recurring maintenance costs compared to wood so over time the costs become comparable. more
Aluminum pergolas rarely require maintenance once they are installed properly. The smooth, nonporous surface withstands weathering so they do not require repainting unless some outside damage occurs. Wood naturally weathers with age, so it may require sanding, painting, staining or sealing every few years. Pressure-treated wood can also warp or crack from temperature changes, settling and weathering. Cracked and badly warped components may eventually require replacement. Cedar and other naturally rot-resistant woods are less prone to warping or cracking, but they may eventually become overly weathered or develop cracks that require replacement. more
Most aluminum pergolas come in prefabricated kits. Although you may be able to add some custom elements the basic design, shape and size options are limited. Wood is more versatile because you can purchase and cut the lumber to any size or design specifications desired. Aluminum kits come in a variety of colors, some designed to mimic natural wood. Scrollwork, angles and curves are also available but wood still provides more customizable options.
Jenny Harrington has been a freelance writer since 2006. Her published articles have appeared in various print and online publications. Previously, she owned her own business, selling handmade items online, wholesale and at crafts fairs. Harrington's specialties include small business information, crafting, decorating and gardening.