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CONCRETE SLAB requirements:
The 6" perimeter of the slab should have no pitch to it as the 6x6 pressure-treated base of the building must sit flush against the foundation and there should be no pitch where the interior support walls come together and rest on the foundation. That said; you can pitch the center and you can pitch near the overhead door entries if it's code in your area to do so. There should be no pre-affixed anchors, hooks or obstructions of any kind implanted in the slab prior to delivery. The slab should be no more than 4" above the surrounding ground. The slab photos shown above are perfect as we must be able to drive up and on the concrete slab during the delivery process. Please refer to our Site Preparation page for further information and requirements. We cannot place our buildings on raised foundation walls, cinder blocks, over basements or any other hollow center. FOR BEST RESULTS; we recommend having the concrete slab dimensions equal to OR just slightly less than the true footprint of the building you purchase. The actual footprints are listed on the drawings or just ask us what your footprint will be. Different buildings have different footprints. **A Blacktop foundation is NOT recommended. In fact, we highly discourage it and in most cases, this would void the warranty**
NOTE: All measurements are outside and approximate. Due to highway travel; measurements are from overhang to overhang. The actual footprint of the building may be less than the purchased dimensions. Please inquire upon order. No building will be higher than 13' 6" on the trailer.
ANCHORING and MOISTURE-PROOFING is the customers responsibility.
Anchoring: Floorless units always require some sort of anchoring. It certainly won't blow away; it's just code requirements. The actual method of anchoring will be determined by your local town building code. There are many anchoring solutions and most are fairly easy. However; we cannot tell you what to use or how to do it. For this reason, we do not offer anchoring services. However; many of our customers have hired the concrete slab contractor to return and anchor the building for them once it's been installed by us. You can also do it yourself; the following web sites may be helpful for guidance purposes and anchor supplies:
STONE/GRAVEL Pad anchoring: American Earth Anchors www.americanea.com or 866-520-8511
CONCRETE anchoring: Concrete Fastening Systems or www.concretefasteners.com or 800-966-9617
Moisture-proofing: Our floorless unit has a 6x6 pressure-treated base which is meant to sit flush right on top of the concrete slab but this does not mean it is automatically water-tight. Water may trickle under if the foundation is a bit off level and specifically if the slab is larger than the building since the rain can't flow away from the base. If your slab is no bigger than the building footprint, as recommended; you shouldn't have much issue with water and any further waterproofing may not be necessary. Obviously, we can't make any 100% guarantee on this since the foundation is out of our hands. You are ultimately in charge of your own success by choosing a quality foundation contractor and a quality sealant if needed. Here are some recommendations for waterproofing:
Solution #1: We recommend running a good long-lasting exterior grade silicone/caulk along the interior and the exterior of the 6x6 pressure-treated base where it meets the concrete slab. Keep in mind that fluctuating temperatures may cause the caulk to contract and expand so more than one application may be needed and it may need to be resealed over time. Many of our customers have had great success with this method. Solution #2: If your concrete doesn't extend out past your building; you can adhere aluminum or vinyl flashing (aka coil stock) around the perimeter. This is sold at any home improvement store and it is available in several widths, many colors and it usually comes in 50' lengths plus it has a 20 yr warranty and generally isn't costly. This would be attached to the 6x6, just below where the siding ends and ideally hang down slightly past your concrete slab edge so water is diverted away from the building foundation.
Unlevel Concrete Slabs/Stone Pads: Unfortunately, not every concrete slab we've worked with has been 100% dead level, so there is a possibility that once the building is set, it won't sit completely flush around the entire perimeter. If there is even a slight dip in the slab, the 6x6 won't sit flush in that space; strategic anchoring usually helps eliminate this problem if it isn't severe. You can also try filling in this 'air space' with spray foam insulation, trimming it flush and even painting it if necessary and then moisture-proofing the base as described above. (Of course, there is the occasional concrete slab contractor who would like to say it's the building and not their slab that's off level until we set our level and prove to them that's just not the case!:>) Unlevel pads can also cause some issues with the pre-hung house doors hanging and working smoothly. 99% of the time, if there is a door issue, it's not the door at all, it's the pad! Dealing with an unlevel, soft, improperly prepared stone pad is a more difficult situation. We do not recommend a gravel stone pad for a floorless structure unless it's for housing animals. In all likelyhood, if it's a garage, your town code will dictate that you need a concrete slab of some sort anyway.
FINALLY, PLEASE CALL OR EMAIL IF YOU OR YOUR CONTRACTOR HAVE ANY FOUNDATION QUESTIONS! IT'S NOT WORTH TAKING A CHANCE AND HOPING IT WILL BE RIGHT WHEN A 5 MINUTE PHONE CALL CAN RESOLVE ANY UNCERTAINTY. MANY CONTRACTORS AREN'T FAMILIAR WITH THE PRE-FAB AMISH GARAGES, THE DELIVERY, OR THE ASSEMBLY PROCESS. THEY LET PRIDE STAND IN THE WAY OF JUST 'ASKING' US. WE'VE SEEN MANY QUESTIONABLE FOUNDATIONS DONE BY SUPPOSED 'PROFESSIONALS WITH 25 YRS IN BUSINESS'. WELL, GUESS WHAT? IT'S YOU, THE CUSTOMER, WHO'S LEFT WITH THE CHANCE OF A VOIDED WARRANTY AND A BUILDING THAT ISN'T SUPPORTED PROPERLY OVER THE LONG HAUL IF THE FOUNDATION ISN'T PROPERLY PREPARED.
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