Grade beam, strip footing and ICF foundations are foundation techniques typically used where soil condition, slope or other consideration does not favour the usually more economical pole building.
The Grade Beam is continuously poured, supported at intervals, usually by drilled piles. The Strip Footing is also continuous poured, supported solely by soil below the prevalent frost line. The ICF system is basically a conventional full-depth concrete foundation using Polystyrene Foam forms intended to stay in place after pouring, to provide thermal insulation.
In each of these cases, as in the use of poured slab foundations, the building above ground will usually be stick-framed . We have ample experience of stick-framing, but it does tend to take considerably longer than a pole frame. Truss attachment is somewhat different, and trusses are spaced closer together than in pole framing. Bracing, however, is still crucial.
Pole frame trusses are spaced at anything from 2 ft to a more typical 6 ft apart, depending on wall height, truss span and snow and wind loads anticipated. Small groups of trusses are assembled on ground as one module, then lifted into place and secured to the posts and to adjacent modules.
Extensive bracing is virtually our trademark. It disperses localised stresses (ie. high wind/snow loading) over as large an area as possible, to diminish the effect, and minimize the possibility of structural damage.
Metal cladding and roofing is typically 29 ga., rolled in a 9/36 profile, factory coated, primed and painted in a choice of 14 colors. It comes in 3’ width, and is factory-cut to length for us. Trim is supplied in 10 ft. lengths in 26 ga., as we find this less likely to distort when fastened.
Increasingly we are being asked to include insulation and interior cladding in our new buildings. We apply Typar exterior wall wrap, R20 or R28 batts in the wall, polyethylene vapour barrier on the inside and ceiling, and blown R40 Atticat insulation overhead. Interior cladding is then done with metal and trim of the same profile and gauge as the exterior. Gable vents on both ends and an attic hatch in the ceiling round off the job. and we’re really proud to put our little metal builder’s plate on the gable end.