The water proofing work comes with a Wykamol 30 year membrane system guarantee. We also offer a 10 year guarantee from Construction Guarantee Solutions. This guarantee can be insured, this means in the unlikely event that there is a problem with our work and the unlikely event that Waterproof Systems Ltd go out of business the work is still guaranteed. The Wykamol Group ( their website )has been established for 70 years and is a market leader in damp proofing and waterproofing products. Waterproof Systems Ltd is one of only a two companies in Sussex to have been awarded with Wykamol Approved Contractor status.