Concrete Roof Tiles: Pros and Cons

Among the available materials to choose from, concrete tiles may present some attractive qualities for those considering roofing options for their new home or remodel. They have excellent longevity, lasting for decades with proper maintenance. Highly versatile, they are available in a wide range of shapes, styles, and colors to suit a wide variety of tastes. Plus they are extremely durable, with inherently high degrees of wind, impact, and fire resistance. For all these reasons concrete tiles are an increasingly popular choice among roofing materials. However, not every home or budget is compatible with concrete tile. In this article we’ll outline both their advantages and limitations for those considering concrete tiles as their roof material of choice.

12 Sustainable Building Materials

A sustainable (a.k.a. eco-friendly) building material is one that minimizes its impact on the environment – whether in its production, use, or disposal – and that can be readily recycled. Building with sustainable materials reduces the amount of carbon involved in the growth, production, and/or manufacturing of the material, thus diminishing the size of the carbon footprint associated with that material. Here we discuss some candidates among the current generation of eco-friendly building materials.

Transparent Aluminum: A Cutting Edge Material

One of the more recent technologies to emerge in the ever-changing world of advanced building materials is transparent aluminum. It has long been the ambition of architects and engineers to find a material that combines the strength and hardness of metal with the crystal-clear purity of glass. Such a “clear metal” could be used, for example, to construct towering glass-walled skyscrapers whose outer skins are structurally self-supporting, with an absolute minimum of secondary supporting members. Transparent aluminum is a cutting edge-material already being used in specialty architectural applications including blast-resistant and infrared-optical windows.

What is Transparent Aluminum?
Known commercially as ALON, transparent aluminum is made of aluminum oxynitride, a combination of aluminum, oxygen and nitrogen. Before it can end up as a hard transparent armor plate, it begins as a powder. This powder is then molded, subjected to high heat and baked, just as any other ceramic is baked. Once baked, the powder liquefies and then quickly cools into a solid, which leaves the molecules loosely arranged as if still in liquid form. The resulting rigid crystalline structure of the molecules provides a level of strength and scratch resistance that’s comparable to rugged sapphire. Additional polishing strengthens the aluminum alloy and also makes it extremely clear.

Chemical Composition
Transparent aluminum is a transparent polycrystalline ceramic with a cubic spinel crystal structure. ALON is produced by combining aluminum, oxygen, and nitrogen. Its chemical formula is Al₂O₂₇N₅.

Physical Properties
• Hardest polycrystalline transparent ceramic commercially available.
• 80% transparent in the near-ultraviolet, visible and infrared regions.
• Best material available material in terms of optical quality.
• It is three times harder than steel and four times as hard as conventional silica glass of the same thickness.
• Corrosion and oxidation resistant.
• High flexural strength.
• Good compressive strength.

Manufacturing Process
ALON production begins by introducing a mixture having aluminum oxide and carbon into a chamber, agitating the mixture within the chamber, and heating the mixture to make aluminum oxynitride. The next step involves pressurizing the aluminum oxynitride powder to 15,000 pounds per inch in rubber molds submerged in hydraulic fluid. The obtained material, which is molded and opaque, is heated to 2000-deg C and kept at this temperature for two days. Once cooled, ALON emerges transparent and is then ground and polished for extra clarity and strength.

Applications of Transparent Aluminum
Although the material has exceptional mechanical and optical properties, at present it is prohibitively expensive to produce. For this reason its current application in construction is relatively limited, constrained to specialty applications including bullet-proof glass, blast-resistant windows, and infrared-optical windows.

It is thought that as the material becomes more mainstream, production costs will become less prohibitive. In turn this could lead to its application in more commonplace uses. Specifically, due to its exceptional strength and impact-resistance characteristics, in the near term it’s well positioned to emerge as a superior alternative to conventional safety glass (i.e. tempered or laminated glass) in building applications. In the longer term, it could be a material poised to allow towering buildings whose skins are made of only transparent metal.

For Further Reading:
• Science Daily has published an article, “Transparent Aluminum Is New State Of Matter”, found at: https://www.sciencedaily.com/releases/2009/07/090727130814.htm
• An article, “What is Transparent Aluminum?” can be found at TheConstructor.org. The link is: https://theconstructor.org/building/building-material/transparent-aluminium/561733/
• Surmet, a producer of transparent aluminum, has published several articles about ALON at: http://www.surmet.com/technology/alon-optical-ceramics/

Ascent Tower the World’s Tallest Timber Building

CTBUH certifies Ascent as World’s Tallest Mass Timber Building
The Council on Tall Buildings and Urban Habitat (CTBUH) has officially declared the recently-opened Ascent tower by Korb + Associates Architects the world’s tallest timber-concrete hybrid building. The 25-story, 86.6-meter (284-foot) structure in Milwaukee takes the distinguished title in two of the mass timber categories: It is both the tallest timber building overall and the tallest concrete-timber hybrid building.

The previous world’s tallest timber building was Mjøstårnet in Brumunddal, Norway, certified by CTBUH in 2019, which stands at roughly 280 feet. Previously holding the record of tallest concrete-timber hybrid building was the approximately 276-foot HoHo building in Vienna, Austria.

The building features 259 luxury apartments, retail space, an elevated pool with operable window walls, and a sky-deck.

In May of 2019, Ascent was named a recipient of a U.S. Department of Agriculture grant awarded through the Forest Service’s Wood Innovations Grant program. The federal grant assisted with the testing needed to prove mass timber’s ability to perform as well as traditional building materials like concrete and steel to meet U.S. building codes.

Plans for the project were unveiled in 2018.While the initial design included 21 floors,updates and subsequent approvals brought the total to 25 floors in March of 2020.

The project had been presented at the 2018 international CTBUH conference in Dubai, the 2019 international CTBUH conference in Chicago, and the 2019 International Mass Timber conference in Portland.

The Ascent development was constructed using a digital twin model, allowing for materials, such as beams, columns, and panels, to arrive on site ready to use with holes pre-drilled to within 1/16-inch accuracy. According to CTBUH, it is estimated that using mass timber for the project decreased construction time by approximately 25 percent compared to a conventional, similarly-sized concrete building.

Building Location, Fire-Rated Construction, and You

Everyone wants to make the most out of their property. Maximizing your open space is the most common approach, and locating your buildings (including accessory structures) as close as possible to your property line is one way to increase the open space between – and thus maximize the usable square footage of – those buildings. However this can come at one fairly big price: fire resistant requirements. This post will explain what has to be fireproofed, what that means, and what that means to you.

Vinyl vs. Wood vs. Fiberglass vs. Aluminum Windows

Getting your house some windows but not sure which one to get? Let us help you decide among vinyl, wood, fiberglass and aluminum windows with our gallery of their differences and advantages and see the best fit according to your needs. Picking windows can be a real challenge. If you find yourself in this situation, read on to learn everything you need to know about vinyl, wood, fiberglass, and aluminum windows.

Slab-on-Grade vs. Crawl Space: Which Foundation System is Best?

Is it better to have a crawlspace or slab-on-grade foundation system? This is a common question among those planning to build or add onto their house. A crawlspace continues to be the more common type of foundation, but slab foundations are becoming increasingly popular. While there are advantages and disadvantages to each type of foundation, the choice ultimately comes down to a combination of personal preference, costs/benefits analysis, short-term vs. long-term advantages, and site-specific conditions accruing to where the new addition or custom home is being built. Continue reading this crawlspace vs. slab comparison to learn which one will best suit your needs.

Wood Flooring 101: Types of Wood Flooring

Wood flooring is a long-lasting, aesthetically pleasing, and affordable interior floor covering. According to the National Wood Flooring Association (NWFA) in a national survey of real estate agents, 90% said that houses with wood flooring sell faster and for higher prices than houses without wood floors. That being the case, who wouldn’t want a wood floor? Prior to racing out and purchasing wood flooring, we need to understand what is available and keep in mind that all wood floors are not created equal.

All About Linoleum Flooring

When the RMS Titanic set sail in 1912, many of its public spaces featured linoleum flooring, and nearly 100 years later, an expedition to the famed wreck discovered those tiles—still intact. Patented by Frederick Walton in 1863, linoleum remains one of the longest-wearing and most versatile of flooring materials.

A Simple Guide to Attic Ventilation

Spending time pondering your roof ventilation system is likely something that you haven’t done. Most homeowners probably haven’t thought about their roof ventilation at all. But when the time comes that you start thinking about it, you’ll want to ensure that it’s properly taken care of and working well. Your roof’s ventilation is essential for the health of your home.