Caulking Professionals – Toronto & GTA An Insider's Guide On Caulking | Page 5

Interior Caulking
• When you are caulking the interior of a home or building, it is of
utmost importance that you ensure that the baseboards, floor trim
and door casings do not have any gaps. These gaps provide space for
insects to enter and allow heat and cool air to escape. When you are
caulking these areas, you will want to remove any door hinges or
locks before applying the product to ensure a cleaner, smoother look.
• Caulking is best used for small repairs in non-structural areas of the
wall. Interior caulking is intended for making minor repairs to
wallboards or window sills. Any larger cracks or structural damage
needs to be dealt with using much heavier repair equipment such as
stucco or plaster.
• If you are caulking a gap that is larger than ¼ inch, you are going to
need to use two layers of caulk. This is because, as caulk is applied,
it begins to shrink from its original size.
• With very large gaps, ½ inch or larger, you will need to pre-fill the
area and use a foam backer. Push the foam backer into the gap first
and then apply the caulking to the area you want covered.