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A 1/4" gap has opened up between a 1-1/4" granite counter top and the granite backsplash in a new house. Backsplash is on exterior furred block wall. There is no evidence of floor movement. Is this a common problem? Know of any articles addressing it?
(Cabinet and Millwork Installation Forum)
From contributor A:
Put a straight-edge on things. Something had to have moved.
• All our work is stored and processed in a climate controlled environment to closely match the existing conditions of the average residence in our area. All new home construction with any type of heating and cooling system and any existing homes with forced air heat and/or central air conditioning must have an automatic humidification/dehumidification system to keep humidity and temperature at consistent levels before and after we deliver. We suggest running the heat and/or air conditioning along with your humidification/dehumidification system for a minimum of 4 weeks before new work is installed. Site conditions need to be 25%- 55% relative humidity and temperature range of 63-78 °F for a minimum of one week before we deliver. Large changes in humidity and temperature will affect the residence and our woodwork. This may cause movement and settling of framed structures and woodwork, causing racking of woodwork or gaps to open between installed woodwork and existing home and within the woodwork itself. Problems caused by this are not covered under our warranty and repairs will be charged on a time and materials basis at a minimum rate of $75 an hour.