Thermo Wood


Zola Thermo Wood is a classic choice for high performance homes. With R-11 glass standard in an industry-leading 18mm spacer thickness, Thermo Wood can be offered in extremely large sizes. Beautiful Meranti wood offers a warm aesthetic and great durability. FSC® certified wood options are available, including Oak, Pine, and Meranti

"Zola provides an excellent product and support for the Passive House Community. The best part, they make a daunting process simple. Love the support after installation, this is a sign of a sure winner."

Rick Milburn, Passiv Works

"Working with Zola Windows has been a stunningly positive experience. Zola offers vastly superior service and responsiveness over any other window provider I have worked with. The price is feasible, the windows are stunning, and the performance is everything a Certified Passive House consultant could hope for, not to mention the color options that come standard, it's enough to make an architect's heart sing…"

Tessa Smith, Artisans Group

"We love tilt-turn windows! And we are very happy that they are finally getting traction in the states. The versatility of the tilt-turn in is really important, allowing for a wide variety of options for air flow. Clients are not opposed to them – in the past it has been a lack of access to windows that offer this option."

Gita Nandan, thread collective

"I have used tilt turn windows for almost 20 years and I enjoy the air flow that you get through a home by the tilt feature. This provides a wonderful convection air stream and most owners are amazed at the tilt swing option of the doors."

Jarrod Denton, Signum Architecture

"It’s important to have a supplier that responds to issues and changes during installation. The Zola tech support team was always available and offered excellent support even after installation. The windows and doors are beautiful. The hardware is incredible. The Breeze Panel bi-folds for large openings operate with ease."

Rick Robertson, Six Degrees Construction

""I have to say, Zola did a great job on Laura & Robert’s windows and doors. They are very well made, and were exactly as specified for both dimension and function. As you know, their performance is a key reason that their house required - no - heating last winter, and that was a cold one.""

Louis Mackall, Architect

"The essence of the home is the connection between the architecture and the landscape, which allows natural light and fresh air deep into each space. The home's large windows and movable walls facilitate this connection and make it a place where the rhythms of the day are felt and the benefits of natural lighting and natural ventilation minimize the home's environmental impact. The solidity of the windows and doors, made possible by the oak frames and triple pane panels, enhances the durability of the home and give it a permanence that is essential to any notion of sustainability."

Mark Gillem, The Urban Collaborative

A selection of Zola Thermo Wood projects:

  • Gillem Residence

    Gillem Residence

    Residential, Zola Portfolio, Zola Thermo Wood
  • Casa Mirasol

    Casa Mirasol

    Residential, Zola Portfolio, Zola Thermo Clad, Zola Thermo Wood
  • North Michigan House

    North Michigan House

    Residential, Zola Portfolio, Zola Thermo Wood
  • Ankeny Row

    Ankeny Row

    Meranti Wood, Residential, Zola Portfolio, Zola Thermo Wood
  • techstyle house

    techstyle house

    Residential, Zola Portfolio, Zola Thermo Wood
  • 8th Street Passive House

    8th Street Passive House

    Residential, Zola American Heritage SDH, Zola Portfolio, Zola Thermo Wood
  • Right-Sized Home

    Right-Sized Home

    Meranti Wood, Residential, Zola Portfolio, Zola Thermo uPVC, Zola Thermo Wood
  • Cedar Haus

    Cedar Haus

    FSC®-Certified Pine, Residential, Zola Portfolio, Zola Thermo Clad, Zola Thermo Wood, Zola ThermoPlus Clad


Expressive Color

expressive stain options

With the Thermo Wood line, there are no limits to your expression. Zola offers a wide range of stained finishes and 300 solid custom color options to choose from, making Thermo Wood an excellent option for the classic look, bold expression, and everything in between.

Exceptional VT Values

exceptional clarity

The ThermoWood line boasts a visible light transmittance (VT) value of 73%, making it one of the clearest window/door solutions on the market.

Wood Options

luxury woods

Zola's Thermo Wood line is built in beautiful Meranti wood, known for its warm aesthetic and great durability. FSC® certified wood options are also available, including Oak, Pine, and Meranti.

Classic Wood

beauty in design

Zola Thermo Wood is a classic choice for high performance homes that want to combine the natural beauty of wood, and capitalize on the many stained finished available. A wide range of stained finishes puts a personalized classic touch to each project, along with as many as 300 color options to choose from.


Rainscreen Cladding

protect your investment

The Thermo Wood line includes a rainscreen cladding to protect the wood on the exterior and to preserve the aesthetics and durability of the wood.

Corner-Style Units

wide glass expanses

Built in triple pane for enhanced thermal performance, the Thermo Wood line is robust and versatile enough to support large glass expanses, making it an excellent choice for scenic projects where energy performance is an important consideration. Quality woods complement this attribute of the Thermo Wood line. Not only are the interiors comfortable but the beautiful woods frame your view of the exterior.

Uncompromising Efficiency

energy efficient

With R-11 glass standard in an industry-leading 18mm spacer thickness, Thermo Wood is a high-performance product line suitable for projects seeking the beautiful contribution of wood windows without compromising energy efficiency.

Thermal Seal

weather proofing

In Zola Thermo Wood, a triple gasket system provides an air and weathertight seal, increasing the thermal performance of the windows and doors, and increasing the interior comfort provided by this line.

Enabling Design

Zolini Handles

Custom cast bronze handles you can design

Besides our standard and upgraded handles, you can order your windows with Italian hand-made, solid bronze Zolini handles. The ultimate in luxury, these handles can be made per your custom design and finished in oil-rubbed bronze and antique bronze. We can also hand plate your handles with silver.

Stain and Paint

Stain and paint options to fit your design

All units come fully finished with stain or solid paint. Zola is proud to offer Zola NakedTM Wood, our proprietary finish that looks and feels like untreated wood while being fully protected (shown, pine on top and oak below). Beyond this, a wide range of stain colors is available, and if you prefer a solid paint, you can make your selection from over three hundred shades.

Our woods

Our woods make our windows

Careful wood selection is paramount to making a great window. We use pine, fir, larch, European white oak, meranti (asian mahogany) and sapele (african mahogany) to make our windows. All our European woods are dense grain, northern species. Each frame is made out of three to four laminations of wood for unsurpassed durability, fit and finish.

Explore our options:

Hardware options

Zola offers a wide selection of hardware options to match your style. Our standard handles are aluminum handles with a metallic finish of your choice. Many customers upgrade to our modern stainless steel handle or our timeless chrome handle. For the very finest selection, consider our Zolini handles. These hand crafted handles are made in Italy, of finest Bronze cast in a traditional mold. Designs span from classic to modern, and finishes can be rubbed (a customer favorite), plated in real silver, or aged. The Zolini designs shown here are only a small selection of what is available. In fact, you can even design your own handles and we create a mold for you.

Hinge options

Zola strongly recommends concealed (hidden) hinges for tilt&turn windows. If 180 degrees of opening angle are required, we need to use classic hinges with a plastic hinge cap. For very large openings, typically over 28sqft, a heavy duty hinge system ,as shown, is required. This hinge does not utilize hinge caps and is crafted from metal in a modern design, available in silver only.

On doors, we typically use three to four hinges, hinge caps allow you to adjust the color to match your decor. Stainless steel hinges or hidden hinges for doors are available on request.

Divided lites and simulated divided lites

Zola offer a wide variety of simulated and actual divided lites. True divided lites separate the glass. Simulated divided lites do not actually divide the glass, but are a glued on bar on the inside and outside (in the case of an aluminum clad window, it would be an aluminum profile on the outside and a wood profile from the inside) as well as a spacerbar between the glass panes, giving the illusion of a true divided lite. This is the most common option. Note that in some high altitude locations and window sizes the spacer bars have to be omitted.

Divided lites, whether true or simulated,  add significant cost to your window package, depending on frequency and layout. Cost increases of 30% are not uncommon. Consider using less or no divided lites and enjoy an uninterrupted view out of your window. A lower cost alternative is to use stick on bars (same as divided lite bars but without the spacer) or dividing bars solely between the glass panes, however, these solutions do not look as good as true or simulated divided lites.

Wood species

Zola offers a wide selection of fine woods for your window and door package. Many of them come standard with 100% FSC ® certification (FSC-C112130). Ask about our FSC® availability. For upgraded wood options, we offer Larch, Meranti, European Oak and Sapele. If you have custom wood needs, please contact our team.


wood species


wood species
Wood stains

Zola ships all windows fully finished, either stained or painted. This way, we can make sure to protect every nook and cranny, as we spray in a temperature controlled booth prior to installing hardware, cladding or glass. The result is a superior, even and highly durable finish. If you choose to have your windows painted, you can select any RAL color or submit a chip for a custom color. For stains, please select any of Zola’s beautiful water based stains below. We especially recommend the Zola Naked TM stain for a matte, unfinished look that offers full protection.


For Tilt & Turn windows, we recommend our snap in, aluminum framed screens.  The frame will be color matched to your cladding (it is shown in white in the picture for clarity), and the corners are miter cut and precision jointed, eliminating plastic connectors that break easily.  The screen is easy to remove in winter from the inside. Seen from the inside, the screen frame does not impede on the glass area, except in the Panoramic View line of windows. For the screen mesh we use Phifer UltraVue, the clearest mesh we can find on the market today.


For single or double swing doors we recommend either our roll-to-the -side or pleated screen system. The pleated system is more expensive, but preferred by most customers, because the threshold added to guide the screen is only approximately 5/16″ high, and the look matches the lift slide pleated screen better.  Because either system stashes to the side, you never need to see the screen mesh when you don’t need it, which makes these screens much more desirable than a screen door.


For Lift and Slide doors we can also offer our factory fitted rolling screen frames. These frames are the size of a door panel, and roll over the fixed part of the sliding door when not in use. The screen mesh is Phifer Ultravue, the clearest mesh we can find on the market today. If you prefer to not see your screen mesh unless it is in use, we instead recommend our pleated or electrically operated roll down screen detailed below.


The pleated screen system for Lift and Slide doors, BreezepanelTM folding wall systems, and large swing doors. This pleated screen can be up to 11′ high, and stows in a small pocket to the side. Up to 16′ of screen can disappear into one side, allowing for a total of 32′ of opening if screens are stowed both to the left and right. These screens are fitted by our technicians after install. Purchase of a Zola Tech service visit with your window package is required if you opt for these screens. Smaller lift slide or Breezepanel openings that are up to 8′ high and 10′ wide are shipped pre-mounted and feature a low profile, 5/16″ threshold.


The electrically operated, Zola roll down screen provides utmost luxury and flexibility. The screen can be up to 10’6″ high and 15′ wide, and the frame pieces will be color matched to your window.  When ordered at the time of placing your window order, these screens can be installed on your window units at the factory (please note that oversized doors that ship as knock-down kits may require partial assembly of the screen system as well).

Safety Glazing

Safety glazing refers to glass that minimizes bodily injury in the case of breakage. This can be achieved by either tempering glass, or laminating glass. Tempered glass is incredibly strong, and if it breaks, breaks into thousands of small crumbles. A good example of tempered glass are the side windows of a car. Laminated glass consists of several sheets of glass, glued togehter with a plastic film in between. If broken, it shatters but stays in place (think windshield of a car). As a standard, Zola recommends and uses tempered glass where required. In a safety glass package, all panes must be tempered or laminated.

Sound proofing

Your home should be your sanctuary. Our high quality, European-manufactured glass and triple sealed frames provide a level of sound dampening of outdoor noise pollution that is exceptional on the North American market. Noise mitigation is particularly important inbuildings near busy streets or highways, train stations, and airports. Whether you are concerned with minor sound dampening or you live in an urban environment where the highest acoustical performance is required, we are sure to have a glass solution that fits your needs.

We use asymmetrical glass assemblies containing one or more laminated glass panes to tailor the sound dampening to your needs.


Security in windows and doors against break ins requires strong hardware and burglar resistant glass. Even our standard multi point locking packages are no match for most thieves, but we can upgrade your window packages with even more locking points and highly crowbar resistant interlocking hardware assemblies at a low upcharge. Glazing can also be customized to prevent break ins and many types are tested to withstand specific tools or even firearms.

Privacy glass

Please find our selection of privacy glass options below. Custom designs in matte glass are also available. Please note that not all privacy glass options are available in oversized glass.

Download CAD details, install details and certifications:

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