Well-built Spalock 280.7 x 231.1 cm Brown from Sannra™ , with high thermal insulation.
Constructions consists of insulating blocks with a density of 25 kg per cubic metre. Reinforcement is via a galvanised steel U-beam.
(steel is superior to aluminium in strength and torsional stiffness) which is embedded in the insulation block so that it does not risk damaging the moisture barrier.
The moisture barrier is in turn vacuum-sealed, hot-welded and made of aluminium-coated plastic film. Thickness and density are extremely important for insulation.
Our Sannra™ Lids therefore have a maximum thickness of 127mm at the centre and 102mm at the sides for effective water drainage. For the lid to remain well on the bath, it comes with a skirt that prevents the wind from grabbing it. It also comes with buckles to attach it to the bath.
The function of the vapour barrier and importance of a spalock is worth commenting on further. One of the most common problems with spalock
is that the vapour barrier gives way and the cover takes in condensation and therefore soon weighs 100 kg. The quality of the vapour barrier is therefore extremely important. We therefore decided to offer the most reliable vapour barrier on the market and we are convinced that we have now achieved this. The moisture barrier is made of Mylar, which is a material made of specially treated polyester and aluminium foil.
Marine vinyl which surrounds the entire structure is of the highest quality and is anti-UV and anti-mildew treated at the factory.
Finally, for maximum durability, the joint of the vinyl is insulated along the entire length of the spalock with 2 small and one long cushion to create the
sustainability and minimise heat loss.