In the current booming construction industry, roof synthetic underlayment, serving as a crucial material safeguarding key properties

like waterproofing and wind resistance for houses, is entangled in numerous misunderstandings. Recently, journalists have carried

out in-depth visits to building materials experts, construction teams, and a vast number of actual project sites to probe into what

exactly the biggest misconception about roof synthetic underlayment is.

After extensive investigations, it has been discovered that the most prevalent misconception in the market currently is that “the

thicker it is, the more durable it will be”. Many homeowners and even some small construction crews often judge the product

quality merely based on the intuitive thickness when choosing roof synthetic underlayment. They presume that the thicker the

underlayment, the better it can withstand wind and rain erosion and the longer its service life will be. However, this is far from

the truth.

A building materials expert pointed out: “The durability of synthetic underlayment is not determined solely by its thickness. The

molecular structure of the material, the waterproof and breathable performance indicators, as well as the application of anti-aging

additives are the decisive factors.” Some inferior thick underlayments on the market simply add filling materials to increase the

thickness, but in fact, they have serious deficiencies in core aspects such as waterproofness and flexibility. Once confronted with

heavy rain and water accumulation, these “puffed-up” thick underlayments are highly prone to leakage, and due to insufficient

flexibility when the temperature changes, they are liable to crack and break, shortening the lifespan of the roof instead.

At the renovation construction site of an old building, the person in charge, Oscar, also reported to the journalist: “In some

renovation projects I took over before, the original roofs were equipped with thick underlayments, but problems emerged frequently

just a few years later. After careful inspection, it was found that the internal fiber structure of the underlayment was loose and the

waterproof coating was of poor quality, completely unable to endure daily wind and rain. In contrast, some synthetic underlayments

produced in accordance with formal standards and with a moderate thickness, relying on advanced polymer formulations, have

remained intact for over ten years on multiple buildings.”

The widespread existence of this misconception not only causes consumers to waste money on inappropriate products but also

poses significant hidden risks for subsequent house maintenance.  so that roof synthetic underlayment can truly fulfill its due

protective functions and provide a solid “protective umbrella” for each building. In the future, with the gradual elimination of

cognitive misunderstandings, the roof synthetic underlayment industry is expected to move towards a more standardized and

efficient development stage.