Caulking Where Siding Meets Concrete

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 where siding meets concrete. Fill the crack with urethane caulk similar to what you would use for driveway caulk. Applying concrete caulk is easy with just a few simple tips and tricks to get you started. Concrete caulk this type of caulk should be used where concrete slabs meet or where they meet with a building. Best for use with aluminum metal concrete mortar plastics rubber stone vinyl and exterior wood.

Concrete caulk comes in several different varieties. Use a smooth even motion filling the crack flush with the surface beveling it if it s against the house. In other words caulking is applied where moisture would otherwise penetrate and cause deterioration. But urethane squirt foam is subject to uv degrada.

Snip the opening of the tube at a 30 degree angle making the opening the same size as your gap. It works perfectly as a concrete expansion joint sealant. Caulking is a sealant that fills gaps cracks nail holes and similar imperfections on the surface. If you use sashco s acrylic latex caulking sealant you can have any interior or exterior as good as new.

But here the main problem is people usually don t find the right type of caulk for their works. Good for gutters siding and concrete. But if the joint is going to be buried behind other finish surfaces and the gap is 1 2 ish or bigger then squirt foam is a good choice. 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.

Flashing acts as a waterproofing layer for this type of siding and caulking will prevent the flashing from doing its job. The best exterior caulk for roofing construction and repairs since it can withstand extreme temperatures and creates a strong insulating and water tight seal. Mostly what kent said. There s a gap along the bottom edge of the siding where it meets the cement foundation about 4 off the ground.

You need to have the best caulk for hardie siding to help your walls and wooden surfaces to get rid of open cracks and thin spaces between joints. It depends on the exact situation. I d like to seal this to make the house more airtight and keep cold air out. I have a cement slab foundation and shiplap board siding attached diagonally.

A polyurethane caulk works best here but silicone will also do.