Caulking Cement Siding

Many professionals like those at james hardie also agree that you should not use caulk on fiber cement siding unless there is no metal flashing underneath.

Caulking cement siding.

Fiberglass cement siding is a composite made of portland cement silica and wood fiber. The last one was quad. 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. Well i ve got cement board siding and occasionally a crack appears.

Also avoid caulking tongue and groove siding boards together. And i m wondering i ve tried a couple different caulks. Caulking around windows doors eaves and trim edges gives added insurance that leaks will not occur. Dap alex plus 12 pack 10 1 oz white paintable latex caulk.

Is there anything out there you could help me with to repairs cement board siding. The nails holding up the siding should not be caulked. The best exterior caulk for roofing construction and repairs since it can withstand extreme temperatures and creates a strong insulating and water tight seal. And it just kind of swells and shrinks with the weather and it shows after you paint it.

Flashing acts as a waterproofing layer for this type of siding and caulking will prevent the flashing from doing its job. Once painted it looks almost identical to wood. Cleanup can be difficult if you get this caulk on clothing gloves shoes or skin. 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 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. Siding nails should not be caulked another item that needs room to play is siding boards themselves. Good for gutters siding and concrete.