Tight Knot Design Build services southern New Hampshire with design and construction of high quality outdoor wood decks. In addition to decking, we also install paver patios and hardwood flooring. At Tight Knot the mission is to create projects that integrate craft and design. The Tight Knot team includes a trained architect, skilled carpenters, and experienced project managers. This unique team structure allows clients access to the services of both an architect and contractor in one place. Streamlined communication under the same team means a greater understanding of project and client needs, saving time and money.