We recommend 100% Pure Hydro-Shield Polyurea to be applied at 2mm DFT on all end-laps. Polyurea has a high Tensile Strength of >2000psi and can withstand the movements. The common notion that Elongation of the coating will prevent joints from cracking open is so WRONG!
Once the roof is sealed water-tight, the rising Hot Air has to go out, if there are no ridge vents, the hot air will continue to push the roof cladding. Horizontal joints are the most vulnerable under tremendous pressure. 100% Polyurea is an excellent solution to deal with this issue. There's no need to do structural hara-kiri as seen on many roofs!
The Key Performance needed on End-Laps is Tensile Strength and not elongation. Do not trust contractors who claim that thermal shocks are the reason for the movements.
Do not believe anyone who blames the failure of waterproofing on Thermal Shocks. When Thermo-Shield Cool Roof Coat is applied on metal roofs, movements caused by Thermal Shocks can be completely ruled out.
It is the upwardly mobile hot air, which causes the significant movements. Call us, to discuss the Technical Details of Polyurea, Tensile Strength, and Waterproofing. Trust physics and nothing else when it comes to waterproofing.
Waterproofing Gutters
We also recommend 100% Pure Hydro-Shield Polyurea Application in metal gutters as most gutters in the region have water ponding issues. Polyurea coatings go through no changes in ponding water and retains its water-tightness.
