General Preface
Bitumen polymer waterproofing membrane roof covers require periodical maintenance in order to ensure their high performance over a period of time. Every product’s technical properties endure an inevitable decline due to various environmental factors such as temperature (especially in the summer months). Other factors include frost/thawing and meteorological precipitation such as hail etc. In this document the most important points will be illustrated along with the best action to take in order to reduce any future problems. We would also like to underline the fact that not directly following regular waterproofing maintenance may result in the loss of insurance cover due to misuse of the product.