There are a variety of factors to consider when choosing a foundation for your Wood-Tex Certified Modular Cabin. We'll work with you and your foundation contractor to ensure that our construction and installation process is compatible with your foundation. Our design team will work with you to decide the best option based on your design, your landscape, code requirements, and other factors.
All our certified modular cabins are engineered to be set directly on a crawl space or basement. On most cabins, several posts or a weight bearing wall is required in the crawl space or basement to support the additional loading on the floor joists. A crawl space is typically 24”-48” deep, constructed with concrete blocks or a poured concrete wall, and only accessible from the exterior. A full basement with 8’ or 9’ walls will give you an abundance of extra storage or even living space. Insulated concrete forms or precast concrete basement walls are a great option if you’re considering using your basement as living space. You can also use concrete blocks or a poured concrete wall. Your Foundation contractor will need to install two Pressure Treated Sill Plates (usually 2x8). The first sill plate is anchored flat on top of the basement wall and the second plate caps the anchor bolt heads to provide a smooth surface to set the cabin modules onto. Our crew will then attach the cabin to the sill plate. Depending on the size of the cabin and the configuration of the crawl space, the cabin can sometimes be delivered directly from the delivery trailer onto the crawl space with no crane. However, for full basements, the cabins generally will require a crane.
There are many choices for Recreational Cabin foundations. Our design team will advise you on your foundation options, and work with you and your foundation contractor to ensure a smooth delivery and long-lasting stability.
Concrete slabs may be poured in (3) different styles: Floating Slab, Monolithic Slab or Footer Slab. The different styles have everything to do with the thickness of the perimeter of the slab. The entire surface area on all three styles is usually poured, giving you a solid surface to set the cabin on. Plumbing such as water supply and sewer hookups must be coordinated with Wood-Tex so everything hooks together smoothly. A solid concrete slab makes an excellent and easy site to place a cabin. Also it will make it nearly impossible for rodents to dig their way under your cabin where they can be a nuisance. Here again it is a good idea to check with your local town to find out if a floating slab is ok or if they will require frost footers.
For details on how to install a stone pad for a cabin see 'site preparation.' A stone pad works great for some size cabins, they are quick, cheap and easy to install. Also should you ever decide to move the cabin a stone pad is easy to get rid of and very non obtrusive. Stone pads are most commonly used on smaller, single story cabins with no water/sewer hookups. As far as the structural integrity of the cabin is concerned almost any size cabin with a standard wood floor will work fine on a stone pad, even most two-story cabins. If you are running water and sewer hookups to the cabin a stone pad is still possible but less popular. The case against a stone pad for some size cabins is the fact that the cabin will float and heave with the land due to natural freezing and thawing and frost. Also many town codes have a size limit for cabins that may be set on a stone pad, it is very common (depending on your location and the size of the cabin) for local code enforcement officers to require concrete piers or footers to place your cabin on.
Although we recommend concrete slab or stone pad for Recreational Cabins, concrete piers can sometimes be used when necessary. Concrete piers are generally 18" in diameter and dug into the ground 36" - 48". The cabin will need to have upgraded floor joists to set on the piers. The exact location and spacing of these concrete piers will need to be coordinated with Wood-Tex so the perimeter of the cabin rests directly on the piers. The advantages of concrete piers include the fact that it usually very reasonable and efficient from a pricing stand point. The piers extend below the frost level in the ground so your cabin will not float or heave with the frost. This can be an advantage when hooking up to utilities. Also if code requires a permanent foundation this may meet their requirements. The area in and around the concrete piers is usually filled in with clean stone to allow good drainage, be sure the stone is at the same level or below the top of the concrete piers. For any double wide cabin, the piers need to be at least 16” above the grade level to allow room to properly join the modules.