Obviously, materials with poorer isolation cause higher losses and therefore higher costs of energy. It is beyond discussion that wood windows and doors have better insulation values than their artificial alternatives. Arbor has improved this inherent superiority of natural wood to even higher levels by its original details.

The construction, hardware and seals of Arbor products are designed to guarantee a full isolation of heat and water. The difference of pressure between external and internal spaces are balanced by weather resistant passages with rounded edges. Draining holes with proper cross-sections deal with water in a controlled way.

None of these measures of insulation overrides the natural "breathing" of wood material used in Arbor products. Our finishing materials, unlike ordinary paints, penetrate into the wood upto an extent and does not form an impermeable film on the surface. The breathing property of our products is easily observed by users, by the moisture inhalation and exhalation of wood material. The users of our products, in a way, breathe the same air with wood.

Enforced sash construction, stronger hardware, special glazing alternatives, stronger glazing beads, extra-secure locking mechanisms, special sash-frame spacing and special assembly procedure do make Arbor one step a head of its international competitors.