Protect Your Home With Our Premier Interior & Exterior Basement Waterproofing Services When it comes to safeguarding your Boston home against basement water damage, there's one name you can trust: K&W Waterproofing. With a proven track record since 1972, our expertise in interior and exterior basement waterproofing is unmatched. We prioritize the longevity and security of your home, which is why we offer a lifetime transferable warranty on our services.