The United Union of Roofers, Waterproofers & Allied Workers, AFL-CIO, represents workers in all facets of the roofing and waterproofing industry. We provide highly skilled, professional craftspeople to our contractors across the nation. Apprenticeship training is available through our locals' Joint Apprenticeship Training Committees, so you can earn a living while learning the trade.

Hoff Heating and A/C offers complete solutions for all of our customers. Our service department will diagnose, repair and maintain your home's heater, furnace, air conditioner, and air quality equipment of all makes and models. Our replacement department offers equipment that will answer all of your indoor comfort needs. Whether you are building your dream home or you are a contractor developing a subdivision, our new construction department will provide you with heating and cooling solutions for every situation.

In business for more than 40 years, Langendorf Supply provides customers with exceptional HVAC systems knowledge to meet their project requirements. Representing global HVAC manufacturers, Langendorf’s product lines support the latest energy, sustainability, and comfort standards. Sales and application engineers focus on customers’ needs and industry changes—building codes, energy-efficient technology, human health and safety, and capital and operational costs. Langendorf Supply offers prompt, problem-solving expertise for design and construction professionals. Langendorf Supply products include grilles, registers, diffusers, VAV and fan terminal units, chilled beams, fan coils, blower coils, custom air handlers, fire dampers, fire/smoke dampers, louvers, control dampers, air measuring systems, controls, rooftop package and split systems, VRF systems, spiral duct and fittings and many other related products. Langendorf Supply serves Mid and Eastern Missouri, Central and Southern Illinios, and Indiana.

WINDOW WORLD OF ST. LOUIS, INC. is a company based out of 13892 ST CHARLES ROCK ROAD, BRIDGETON, Missouri, United States.

Air Comfort Service, Inc. is a family owned and operated residential and commercial heating and cooling company celebrating our 50th Anniversary of serving the Greater St. Louis area! We offer the following services: -heating -cooling -indoor air quality (humidifiers, air cleaners, uv lights) -ductless systems -water heaters -maintenance plans -Aeroseal duct sealing We provide: -24 hour emergency service -service for all makes and models -free estimates for new equipment -0% financing for those that qualify Get in your comfort zone with Air Comfort Service, Inc. Heating & Cooling!

CS Flooring is the largest, most experienced commercial flooring service center in the St. Louis area. We have been providing quality flooring with expert installation to commercial offices, multi-family properties and senior living facilities since the early 1970’s. We offer a wide selection of carpet, vinyl, ceramic, laminate, luxury vinyl and tile flooring products suitable for any application. No job is too big or too small for your hometown flooring experts at CS Flooring.

Builders Bloc Contracting is a construction company based out of 707b Davis Rd, Elgin, IL, United States.

At Karsten International, we aim to create products and brands that make life smarter, healthier and sustainable. We accomplish this by combining over ten years of knowledge and experience, with a talented and ambitious team specialized in logistics, product & brand development, private labeling, e-commerce and after-sales. As a full-service provider we remove thresholds. This can concern handling logistics, taking care of financial concerns, or providing additional services beneficial to the product's life cycle. We can do this for your private label or for one of our independent brands. Whether you are a manufacturer seeking new opportunities within the competitive European market or a retailer searching for best value consumer products, we can bridge that gap with you by delivering tailor-made solutions. Karsten International is a Dutch scale-up located in the center of Amsterdam.

Electric Controls Co is an electrical/electronic manufacturing company based out of 2735 Mercantile Dr, St Louis, MO, United States.

National Glass & Glazing (NGG, Ltd., Inc.), a full service curtain wall design, fabrication and installation contracting company was established in St. Louis, Missouri in 1982, Our focus in the industry is larger construction with custom curtain wall applications. NGG, Ltd., Inc. designs, manufactures and installs all of its own wall systems. Our scope of work includes unitized pre-glazed curtain wall, composite metal panels, stone and pre-cast panels, ceramic tile panels and customized sunshades and trims. Although this is our main focus, we also collaborate with key suppliers of proprietary curtain wall systems to suit the demand of any project. Our customer base spans from commercial building high rises, hospitals, academia, state, local and federal buildings that meet the latest blast/ ballistic, hurricane and tornado protection requirements. Over the history of NGG we have created strategic relationships with other similar companies and utilized their strengths as subcontractors to supplement capacity and compatibility needs of NGG, Ltd., Inc. in the execution of our projects. Some of the work we use these subcontractors for includes perimeter sealant, insulation, custom entrances, skylights, clerestory and numerous other compatible glazing solutions.. Through the years NGG, Ltd., Inc. has serviced general contractor clients in Texas, Illinois, Missouri, Washington, Mississippi, Oklahoma, Tennessee, Virginia, and Kansas in glass integration and exterior wall solutions.

Kay Bee Electric Company Inc is a construction company based out of 250 Rue Saint Francois, Florissant, Missouri, United States.

The PaintSmiths of St. Louis, Inc. is a family-owned, union painting contractor based in St. Louis, Missouri. Established in 1963, PaintSmiths is now in its second generation of leadership with 50 years of quality and experience. Today, PaintSmiths competes in the commercial, industrial, high-end residential, special finishes, and wallcovering sectors of the finishing industry across the United States, with job locations including Alaska, Hawaii, Maine, and even Puerto Rico. This company finds pride in offering a variety of services while holding both safety and quality as priorities.