Water absorption and transference must be stopped to maintain interior air quality. * always coat the exterior and interior of your walls with waterproofing. You can do a finish coat of stucco to attain a particular texture, though, or use a synthetic stucco mixture. * interior walls are surface bonded, so there is no need to stucco or drywall. Removing air pockets from structural concrete filled cores is very important for ultimate wall strength. These tools are relatively inexpensive from companies like Harbor Freight Tools. * vibrate the newly poured wall cores thoroughly to avoid air pockets. The empty cores should be filled with concrete, sand or some other solid thermal mass material. This is counter to what you are trying to achieve. * do not fill block cores with insulation or foam. With any surface bonding cement, conventional mortared block, or poured-in-place cement wall, key is: While possible in theory to rely upon SBC for flexural strength in excess of standard mortared cinder block wall construction, it is rare to see an engineer pursue that opportunity for a client and scale back rebar reinforcement. SBC is much easier for unskilled homeowner builders without any experience laying block and can make excellent use of large volunteer work crews for a 'barn raising' to speed construction. Once your block walls have been surface bonded, hollow vertical cores (minimum every four foot and alongside every opening) are filled with ready-mix concrete grout and a #5 rebar for an exceptionally strong heat storage mass. Applied 1/8 inch thick minimum to both sides, surface bonding cements have strengths that are superior to conventionally mortared block walls and they look a lot better too without any grout lines. You simply stack the concrete blocks in a running bond pattern and then parge coat both sides with a single layer of fiber reinforced, surface bonding cement.
#Interlocking shooting blocks how to#
They don't have to interlock, and best of all you don't have to know how to lay block. Engineering can be identical to mortar block walls common to commercial buildings, with SBC adding waterproofing and a great deal of torsional strength.īlocks for dry stacking with surface bonding cement do not need to be of any special design. SBC is featured here given its ease of construction and better acceptance among engineers, building officials, mortgage brokers, and insurance companies.
Other thermic wall building materials are functionally as effective: concrete, rammed earth, adobe, superadobe, and slag, stone, or bag walls. Locally sourced common concrete or cinder blocks are fine.ĭry stack block with SBC was never the primary focus of our HTM design, simply an economical construction option for homeowner-builders. No need for importing expensive special 'interlocking dry stack blocks' when you are dry stacking with SBC. Should you have poor quality block in your area, a thin coat of mortar can be added wherever needed to bring wall back to plumb. The rest of the dry stack block courses are laid without need for any mortar between blocks as long as they are of uniform size. With dry stack construction, only the first course is bedded in grout on the footer to establish plumb and level for the wall.
#Interlocking shooting blocks code#
SBC is commonly required by local building code for sub-grade mortar block walls to ensure integrity. So it should be nothing 'new' to an experienced engineer. SBC 'stucco' with horse hair and calcium carbonate was used hundreds of years ago to build huge water storage cisterns. Dry stack concrete block (cinder block) technique uses surface bonding cement SBC instead of mortar for high thermal mass HTM thermic walls that are waterproof and much stronger than conventionally laid mortar block walls.
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