Hey there! In this episode of MAN about TOOLS, Kent takes us through the process of building a post and beam greenhouse with a poured concrete foundation. He starts off by covering the excavation, concrete forms, and pouring the foundation, and then moves on to cutting, notching, and preparing the posts, beams, ties, and rafters. Kent takes you through every step of the construction process, from installing the twin wall polycarbonate glazing on the walls and roof to building and installing a light-weight cedar door. He also includes custom cedar louvered vents and a fan for proper air circulation. Make sure to stay tuned for the follow-up series with more detailed information, and don’t forget to check out Kent’s greenhouse plan, available for purchase. You can find him on Instagram, Twitter, and Facebook, as well as support him on Patreon. Just remember, some of the links in the video are affiliate links, which means Kent will receive a commission if you purchase any tools through them. Enjoy building your very own post and beam greenhouse!
Materials
Posts and Beams
The greenhouse is constructed using 6×6 Western Red Cedar posts and beams. These sturdy materials provide the foundation and framework for the structure. The posts are cut to length and notched to fit into galvanized post saddles embedded in the poured concrete foundation. The beams run north to south and are made from two sections bolted together, providing additional strength and stability to the greenhouse.
Ties and Rafters
Cross ties are installed between the north-south beams to reinforce the structure and provide support. These ties are made from 6×6 Western Red Cedar and are notched to fit into the beams. The rafters, which form the roof of the greenhouse, are made from 2×6 lumber and are cut to length and attached to the posts and beams using screws. These components work together to create a strong and durable framework for the greenhouse.
Polycarbonate Glazing
Twin wall polycarbonate glazing sheets are used for the walls and roof of the greenhouse. These sheets are lightweight, durable, and provide excellent insulation and UV protection. They are cut to size and attached to the framework using screws, creating a watertight and weather-resistant enclosure. The polycarbonate glazing allows ample sunlight into the greenhouse while minimizing heat loss, creating an ideal environment for plants to thrive.
Cedar Louvered Vents
To ensure proper airflow and ventilation, custom cedar louvered vents are installed in strategic locations throughout the greenhouse. These vents allow hot air to escape and cool air to enter, creating a well-ventilated and comfortable environment for plants. The vents are carefully designed and constructed to blend seamlessly with the overall aesthetic of the greenhouse and provide both functionality and visual appeal.
Fan
In addition to the louvered vents, a rear exhaust fan is installed to further enhance airflow and ventilation in the greenhouse. The fan helps to circulate fresh air and maintain optimal temperature and humidity levels, creating the ideal conditions for plant growth. The fan is strategically positioned to ensure proper air circulation and can be adjusted to meet specific needs and preferences.
Cedar Door
A lightweight cedar door is built and installed in the greenhouse to provide easy access and convenience. The door is made from high-quality Western Red Cedar and is carefully crafted to match the overall design and aesthetic of the greenhouse. It is designed to be weather-resistant and durable, ensuring long-lasting performance. The cedar door adds both functionality and visual appeal to the greenhouse, enhancing its overall charm and elegance.
Ridge Cap
The roof of the greenhouse is finished with a two-part ridge cap. The first part is a custom wooden cap that is carefully crafted and attached to the ridge beams. This cap provides additional structural support and helps to seal the roof. The second part is a galvanized pre-formed top cap that is installed over the wooden cap. This top cap adds an extra layer of protection and ensures that the greenhouse is watertight and resistant to leaks. The ridge cap not only enhances the durability of the greenhouse but also adds a finishing touch to its overall appearance.
Tools and Equipment
The construction process requires various tools and equipment to ensure accuracy, efficiency, and quality. Some of the essential tools and equipment used in the greenhouse project include excavating tools, concrete forms, concrete pouring equipment, saws, drills, screwdrivers, clamps, measuring tools, and safety equipment. The video creator mentions that all the tools and equipment used in the project were personally purchased, highlighting the commitment and dedication to producing a high-quality greenhouse.
Construction Process
Excavation
The first step in the construction process is excavation. The area where the greenhouse will be built is marked and prepared for excavation. The topsoil is removed, and trenches are dug for a perforated drain pipe. This pipe will collect water from under and around the greenhouse and redirect it away from the structure. After the trenches are dug, they are lined with landscape fabric and filled with drain rock. This helps to ensure proper drainage and prevents water accumulation around the greenhouse.
Concrete Forms
Once the excavation is complete, concrete forms are built to create the foundation for the greenhouse. The forms are constructed using stacked 1×8 boards, with additional 2×4 supports for stability. Rebar is bent and suspended within the forms to reinforce the foundation. The formwork is carefully positioned, leveled, and squared before being secured in place with stakes and braces. This ensures that the foundation will be even and properly aligned.
Foundation Pouring
With the forms in place, the concrete is mixed and poured into the foundation. The video creator mentions using a small concrete mixer capable of handling two bags at a time. This allows for efficient mixing and pouring of the concrete. After the concrete is poured, galvanized post saddles are embedded in the wet concrete at each corner, along with additional saddles on each side of the doorway. These saddles will provide stability and support for the posts and beams.
Preparing Posts, Beams, Ties, and Rafters
With the foundation in place, the focus shifts to preparing the posts, beams, ties, and rafters. The 6×6 Western Red Cedar posts are cut to length and trimmed at the bottom to fit into the post saddles. The edges of these components are chamfered with a power plane and sanded to ensure smoothness and aesthetics. The surfaces of the posts are then stained with multiple coats for added weather resistance.
The beams, ties, and rafters are also cut to length from the Western Red Cedar lumber. These components are chamfered in the same manner as the posts to create a cohesive look. The video creator highlights the importance of chamfering the edges to provide a finished appearance and prevent sharp edges.
Assembly
Once all the components are prepared, the assembly of the greenhouse begins. The posts are stood upright and secured with screws, temporary braces, and stakes. The beams and ties are then placed on top of the posts and secured with bolts. Careful attention is paid to ensure that the structure is level, square, and properly aligned. Temporary braces are added to support the ridge beam and ensure stability during the construction process.
Once the main framework is assembled, the rafters are attached to the beams using screws. Temporarily supports and blocking are added to strengthen the structure and provide additional stability. Fascia boards are then screwed to the rafter tails, completing the basic framework of the greenhouse.
Installing Polycarbonate Glazing
After the framework is complete, the next step is to install the polycarbonate glazing sheets on the walls and roof of the greenhouse. The twin wall polycarbonate sheets are cut to size and attached to the framework using screws. Special care is taken to ensure that the sheets are properly aligned and securely fastened.
Building Cedar Louvered Vents
To promote airflow and ventilation within the greenhouse, custom cedar louvered vents are built and installed. These vents are strategically placed to allow hot air to escape and cool air to enter, creating a well-ventilated environment for plants. The vents are carefully designed and constructed to blend seamlessly with the overall aesthetic of the greenhouse while providing optimum functionality.
Installing Fan
In addition to the louvered vents, a rear exhaust fan is installed to enhance airflow and circulation. The fan helps to maintain optimal temperature and humidity levels within the greenhouse, creating an ideal environment for plant growth. The fan is strategically positioned to ensure proper air circulation and can be adjusted to meet specific needs and preferences.
Building Cedar Door
To provide easy access to the greenhouse, a lightweight cedar door is built and installed. The door is carefully crafted from high-quality Western Red Cedar to match the aesthetic of the greenhouse. It is designed to be weather-resistant and durable, ensuring long-lasting performance. The cedar door adds both functionality and visual appeal to the greenhouse.
Finishing with Ridge Cap
The construction of the greenhouse is completed with the installation of a two-part ridge cap for the roof. The ridge cap consists of a custom wooden cap followed by a galvanized pre-formed top cap. This combination provides structural support and ensures the watertightness of the roof. The ridge cap adds a finishing touch to the greenhouse, enhancing its durability and overall aesthetic appeal.
Additional Resources
Follow-Up Series
The video creator mentions a four-part follow-up series that provides more detailed instructions and insights into the construction process. This series is designed to offer in-depth guidance for those interested in building a similar greenhouse and delves into specific steps and techniques involved in the project.
Greenhouse Plan for Purchase
For those looking for a complete greenhouse plan, the video creator offers a 14-page greenhouse plan that is available for purchase. This plan includes detailed drawings, measurements, and instructions to guide DIY enthusiasts through the construction process. The greenhouse plan provides a comprehensive roadmap for building a post and beam greenhouse similar to the one showcased in the video.
Social Media Accounts
To stay connected and informed, the video creator has various social media accounts. These accounts include Instagram, Twitter, and Facebook, where the creator shares updates, insights, and additional content related to the greenhouse project and other DIY endeavors. Following these accounts allows enthusiasts to stay engaged and gather inspiration for their own projects.
Patreon Page
To further support the video creator and gain access to exclusive content and benefits, enthusiasts can visit the creator’s Patreon page. By becoming a patron, individuals can contribute financially to the creator’s projects and gain access to behind-the-scenes footage, exclusive tutorials, and early access to videos and content. The Patreon page serves as a platform for supporters to connect and engage with the video creator on a more personal level.
Affiliate Links
Some of the links mentioned in the video are affiliate links. This means that if tools or equipment are purchased through these links, the video creator will receive a small commission at no additional cost to the buyer. By utilizing affiliate links, viewers can support the video creator’s work and ensure the continuation of valuable content and projects.
Kent’s Project
Building in Kent’s Garden
Kent, the individual featured in the video, is constructing the post and beam greenhouse in his garden. The greenhouse is carefully positioned to maximize sunlight and accessibility, making it a convenient addition to Kent’s gardening routine. The location of the greenhouse is directly across a pathway to a potting bench that Kent built previously, enhancing the functionality and practicality of the garden layout.
Poured Concrete Foundation with Anchor Bolts
Kent’s greenhouse features a poured concrete foundation with embedded anchor bolts. The foundation is constructed using concrete forms and is carefully leveled and squared to ensure stability and durability. Post saddles and anchor bolts are installed in the wet concrete, providing robust support for the posts and beams of the greenhouse. The poured concrete foundation with anchor bolts reinforces the structure and ensures its long-term integrity.
Timber Frame Look
Kent’s project embraces a timber frame look, which blends seamlessly with other structures on his property. The use of Western Red Cedar posts, beams, and other components contributes to this aesthetic, providing a natural and rustic feel to the overall greenhouse design. The timber frame look adds character and charm to the greenhouse, creating a visually appealing and cohesive garden structure.
Detailed Steps and Instructions
Kent provides detailed steps and instructions throughout the entire construction process. He highlights essential techniques, tools, and materials, ensuring that viewers can understand and replicate the building process. Kent’s attention to detail and comprehensive explanations offer valuable guidance to DIY enthusiasts interested in constructing a similar greenhouse. His thorough explanations and insights make the project accessible and achievable for individuals of varying skill levels.
Greenhouse Features
6×6 Posts, Beams, and Cross Ties
The greenhouse utilizes robust 6×6 Western Red Cedar posts, beams, and cross ties. These substantial components provide a solid and reliable framework for the greenhouse. The 6×6 size ensures stability and longevity, creating a durable structure that can withstand changing weather conditions and environmental factors.
2×4 Stud Walls
The east and west sides of the greenhouse feature 2×4 stud walls. These walls provide additional support and enclosure, maintaining the integrity of the structure. The stud walls are built using high-quality lumber and are carefully positioned to enhance the stability and overall design of the greenhouse.
Curved Corner Braces
To reinforce the structure and add visual interest, four curved corner braces are installed. These braces are flush-mounted with lag bolts, creating a seamless and secure connection between the beams and posts. The curved design of the braces adds an element of elegance and sophistication to the greenhouse, elevating its overall aesthetic appeal.
Framed Doorway
The front of the greenhouse is highlighted by a framed doorway. This doorway is constructed using 2x4s and is carefully framed out to provide a clear entry and exit point. The framed doorway adds a touch of architectural detail to the greenhouse, making it both functional and visually pleasing.
Galvanized Drip Edge Flashing
To ensure proper water drainage and protection, galvanized drip edge flashing is installed at the bottom of each stud wall. This flashing prevents water from seeping into the greenhouse and helps direct it away from the structure. The galvanized material adds durability and longevity to the greenhouse, ensuring that it remains resistant to water damage and leaks.
2×6 Rafters
The roof of the greenhouse is supported by 2×6 rafters. These rafters provide structural support and stability, ensuring that the roof can withstand various weather conditions. The 2×6 size is chosen for its strength and load-bearing capacity, guaranteeing the long-term durability of the greenhouse.
Polycarbonate Glazing Sheets
Twin wall polycarbonate glazing sheets are used for the walls and roof of the greenhouse. These sheets offer excellent insulation and UV protection, creating an ideal environment for plant growth. The polycarbonate material is lightweight and durable, ensuring longevity and resistance to damage. The glazing sheets allow ample sunlight into the greenhouse while minimizing heat loss, creating optimal conditions for plants to thrive.
Louvered Vents for Airflow
Custom cedar louvered vents are installed throughout the greenhouse to promote proper airflow and ventilation. These vents allow hot air to escape and cool air to enter, maintaining a well-ventilated and comfortable environment for plants. The louvered vents are designed to seamlessly blend with the overall aesthetic of the greenhouse while providing functional benefits.
Rear Exhaust Fan
In addition to the louvered vents, a rear exhaust fan is installed to enhance airflow and circulation. This fan further contributes to the optimal conditions for plant growth by ensuring proper ventilation and temperature control. The rear exhaust fan is strategically positioned to facilitate efficient air circulation and can be adjusted to meet specific airflow requirements.
Overall, the post and beam greenhouse described in the video and article offers an excellent gardening solution for DIY enthusiasts. The use of high-quality materials, careful construction techniques, and attention to detail result in a sturdy, functional, and visually appealing structure. Whether one is a seasoned gardener or just starting out, this greenhouse provides an ideal environment for plants to flourish and thrive. With detailed instructions, additional resources for guidance, and the opportunity to support the video creator, building a post and beam greenhouse becomes an achievable and rewarding project.
