The hatch access roof domes feature the following specification:
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Triple glazed clear polycarbonate sheeting. This gives:
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Great visibility and light transmission.
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Great insulation (U value) to comply with Part L Building regulations.
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Security and impact resistance.
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Fire retardant (British BS476 and European fire classification Class B-s1, d0 to BS EN 13501 Part 1.)
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Structural insulated tapered PVC upstand which gives it strength, heat retention and makes installation easier.
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Lockable internal handles to allow the opening of the hatch dome from the inside, and to securely lock it to from others getting in.
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Hinged lid with gas ram supports
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This lid will open at 90 degrees for easy access, and neatness.
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The gas rams allow for a more controlled opening and shutting.
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The gas rams prop the lid open stopping the wind from blowing it shut / around.
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Trickle vents.
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Allow ventilation without the lid open, for example it might be raining.
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Help to maintain a comfortable indoor environment.
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To help prevent condensation.
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To help stop could growth attributed to condensation.
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The vents meet BS EN 13141 Part 1 2004 for air flow, air leakage and weather tightness.
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Fully Weathertight, the access hatch domes comply to the requirements of BS EN 1873:2005 ensuring reliable all weather performance
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Fully BBA accredited – Certificate No 06/4385.