Frequently Asked Questions
Why does composite decking need specific expansion gaps in Chapel Hill's climate?
Triangle temperature swings cause composite materials to expand and contract more than wood. Proper spacing between boards compensates for thermal movement that occurs between summer heat and winter cold. Incorrect gaps lead to buckling in summer or excessive spacing in winter.How does clay soil in the Triangle area affect deck foundation planning?
Clay soil expands when wet and shrinks when dry, creating foundation movement that stresses deck structures. Proper foundation techniques account for this soil behavior to prevent settling and structural shifts. Durham and Chapel Hill properties with clay require deeper footings and specific drainage planning.What's the difference between sanding peeling stain and stripping it completely?
Sanding removes loose material while preserving well-adhered stain, creating a smooth surface for new coats. This approach saves preparation time and avoids harsh chemical strippers. The deck surface is prepped through pressure washing, sanding, then proper drying before stain application.Why do you need a moisture meter before staining a deck?
Triangle humidity keeps wood moist even days after rain, and stain won't adhere to wet lumber. Moisture meters confirm wood has dried to proper levels, typically below 15% moisture content. Applying stain to damp wood causes peeling and premature failure within months.What does joist inspection involve before replacing deck boards?
The framework underneath boards gets checked for rot, insect damage, and structural integrity before new surfaces go down. Replacing boards over compromised joists wastes money because the deck will fail structurally. This inspection catches hidden damage that surface assessment misses.How do cable railings need to be tensioned differently in humid climates?
Humidity causes cable systems to expand slightly, so initial tension must account for seasonal weather changes. Threaded tensioners allow adjustment as cables settle and respond to Triangle's moisture fluctuations. Proper installation prevents sagging during humid summers while avoiding over-tension in dry periods.When should you call 811 before deck construction?
Utility marking must happen before any digging for footings or posts to avoid underground lines. Call at least two business days before excavation starts so electric, gas, and water lines get marked. Hitting unmarked utilities causes dangerous situations and expensive repairs.What's involved in deck structural inspection beyond visual assessment?
Inspections include ledger board examination where the deck attaches to the house, support post evaluation, and strength testing of questionable areas. Hidden damage behind fascia boards and inside joist pockets gets checked because surface appearance doesn't reveal structural compromise. This approach identifies problems before they cause safety failures.How does aluminum railing installation differ from basic hardware mounting?
Reinforced mounting points get installed where posts connect to deck framing, not just surface-attached brackets. Proper installation accounts for Triangle temperature changes that affect aluminum expansion. Posts must be secured to structural members with through-bolting rather than surface screws.What makes deck add-ons structurally different from building a separate new deck?
Additions integrate with existing framework through ledger connections and shared support systems rather than independent structures. The expansion must match existing deck height, match joist spacing, and tie into current framing without creating weak connection points. This approach creates one unified structure instead of two decks pushed together.