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    • 4. 发明专利
    • Weight saving hot tub cover
    • GB2466007A
    • 2010-06-09
    • GB0822211
    • 2008-12-05
    • COOPER JEREMY BERNARD
    • COOPER JEREMY BERNARD
    • E04H4/08
    • The invention relates to a cover or lid for a hot tub or spa and comprises a slab of insulation 9 enclosed with a water vapour barrier layer 10 with a gap 13 in the vapour barrier layer. The gap is at a position where the temperature is normally less than that within the insulation. The gap allows water vapour to escape and prevents weight gain due to the build up of condensation and subsequent waterlogging of the insulation material. By allowing water vapour to escape, the life of the cover or lid is substantially extended. The barrier layer may be bonded to the insulating slab and thereby forms a seal to prevent water from entering between them. The insulation is preferably expanded polystyrene and the barrier layer a high-density polyethylene, A channel 12 may also be formed in the underside of the slab to increase ventilation between the corner of the cover or lid and the vapour space (11 figure 2).