Caulking Cement Siding

Dap alex plus 12 pack 10 1 oz white paintable latex caulk.

Caulking cement siding.

Well i ve got cement board siding and occasionally a crack appears. And it just kind of swells and shrinks with the weather and it shows after you paint it. Fiber cement siding gap clearance caulking specifications. Flashing acts as a waterproofing layer for this type of siding and caulking will prevent the flashing from doing its job.

When james hardie siding products butt into wood based materials a 1 8 gap will allow for expansion and contraction of the wood based product. Also avoid caulking tongue and groove siding boards together. Good for gutters siding and concrete. And i m wondering i ve tried a couple different caulks.

Siding nails should not be caulked another item that needs room to play is siding boards themselves. It s available in many styles and widths both smooth and wood textured and you still get the crisp joints and details that ll make your home s exterior stand out. The best exterior caulk for roofing construction and repairs since it can withstand extreme temperatures and creates a strong insulating and water tight seal. Is there anything out there you could help me with to repairs cement board siding.

Cleanup can be difficult if you get this caulk on clothing gloves shoes or skin. Fiberglass cement siding is a composite made of portland cement silica and wood fiber. Metal flashing or any metal to wood joint should not be caulked another water exit pathway that should never be sealed. The following information is adapted expanded a bit from certainteed corporations installation instructions for the company s fiber cement siding products as this is the most comprehensive guide we could find for caulking clearance instructions when installing fiber cement siding.

The nails holding up the siding should not be caulked. Once painted it looks almost identical to wood. Item 157140 model 11532.