Timber frames are butt jointed and fixed with nails. Atmospheric conditions will cause timber to warp and move, resulting in unsightly nail popping and potentially unsafe wall and roof structure. Timber, being a water based cellulose product, shrinks and expands according to environmental conditions at a rate the conflicts with claddings and plasterboards, causing lining surface to crack, peaking of ceiling joints and cracked cornices. Steel framing, on the other hand, is strong, safe and silent, and is riveted and bolted into place, ensuring virtually no movement for the lifetime of the house.