Roof Nails Sweating

Before hurricane andrew devastated south florida in 1992 roof sheathing was generally attached using 6d nails spaced at 6 inches along the edges of the sheathing and at 12 inches along interior.

Roof nails sweating.

Condensation is more apt to occur in climates where the average temperature is 35º f or colder. Although moisture problems in the roof assembly can be due to waterproofing deficiencies don t neglect the effect of condensation. It can lead to roof leaks even if rain has not occurred for several days. If your roof deck or insulation is developing water droplets chances are your forehead is too.

These nails will eventually rust. Roof nail leaks can happen when roof nails have been loosened slightly from high winds or have simply pulled out over time. Roof sheathing panel spacing hints. Remember the last hot and humid day you were sitting outside drinking a cold beer iced tea soda or glass of ice water.

It should to a degree. Condensation happens when moisture filled air contacts anything that is below the dew point temperature. Use a 10d box 0 128 inch by 3 inch nail as a spacer to gauge 1 8 inch edge and end spacing between panels. Condensation is a common sign of inadequate insulation and or ventilation.

Condensation is usually first noticed on your windows and skylights because they are the most visible areas of your house. Frost on nails in attic spaces may frighten you. Metal gets cold faster than other items so condensation begins on metal first. Moisture that escapes into the cold attic from the rooms below often condenses on cold nails.

If shingles get lifted or torn from high winds the damaged shingle exposes nails holding the shingle below it. Sometimes you can spot this if you climb up into your attic on a cold night. And just one rusted out nail can cause your roof to leak every time it rains. Spacer type panel edge clips are available from some manufacturers.

Frost on nails is frozen condensation. Edge clip requirements depend on the relationship of the panel span rating to the actual distance between roof framing. It s important to realize frost is in your attic for a few reasons. But with proper design and maintenance principles you don t have to sweat roof condensation issues.