Make sure to check for leaks and any visible cracks in the concrete, the floor-to-wall joints, expansion control joints in the floor, and all penetrations.You can test for moisture transmission through the concrete by placing a foot-square of plastic or aluminum foil on the floor or wall, seal the edges with duct tape, and check after a couple of days for drops of water. How to Check for Moisture TransmissionMany home sales get re-negotiated or even canceled when the building inspector discovers moisture in the basement. Water may take years to start seeping through concrete but nothing holds back gases - invisible water vapor and radon gas flow right through the pores. RadonSeal will not inhibit the bond of mortar, adhesive, thin set, paints, tiles, etc.How To Seal A Brick Foundation Wall – RadonSeal is best used on concrete. Afterwards, tuck point the mortar where needed. Remove crumbling mortar then, seal with RadonSeal.

Let the concrete dry out for a couple days and then, seal the other side.STEP 4: Make any repairs to foundation cracks, floor cracks, gaps, control joints, floor-to-wall joints, etc.How To Seal An Stone Foundation Wall – RadonSeal will strengthen and waterproof old mortar as well as limestone. You can move all your 'stuff' to one side of the basement and seal the other side first. Follow this basic step-by-step approach for drying out your damp basement:STEP 1: Remove any paints, sealers, tile adhesive, efflorescence, and oils from the concrete.STEP 2: Shop-vac the surface of the concrete removing loose or crumbling concrete, mortar, dust, and dirt.STEP 3: Seal the concrete walls and floor against moisture with RadonSeal®. How To Waterproof Your Basement in 4-StepsTackling a basement waterproofing project can prove to be daunting task but the labor involved may not be as strenuous as you thought.

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