Covers for Intentional Slab Penetrations

Select sealants that:

are compatible with their intended surfaces,

allow for differential expansion and contraction between dissimilar materials,

meet the requirements of the applicable fire safety code (e.g. thermal or ignition barriers), and

for use inside the pressure boundary select low volatile organic compound (VOC) sealants that meet independent testing and verification protocols

Select materials that:

adequately support applied load and are permanent air barriers,

meet the requirements of the applicable fire safety code (e.g. thermal or ignition barriers),

for use inside the pressure boundary select low volatile organic compound (VOC) materials that meet independent testing and verification protocols, and

pest-resistant materials that are rated for ground contact anywhere they are in contact with the exterior foundation walls, piers, or bare earth

Remove any material from the sealing area that will prevent full adhesion of the selected sealant

Cover sump pump wells or pits with an airtight cover that allows for all necessary penetrations to be tightly sealed

Sump pump covers must allow bulk moisture to drain from above the cover utilizing trapped or one-way ball valve fittings, or equivalent

Cover all exposed water sources with an operable (able to be opened for maintenance) access

Covers must be rigid, durable, and suitable for high-moisture exposure

Required cap penetrations will be close fitting (do not have to be airtight) and not interfere with drainage of water from above or below the basement floor