em.vault Barrel Vault
em.vaults are high quality continuous barrel vault rooflights designed to maximise natural light.
These flat roof windows are suitable for flat roofs including single ply, felt, hot-melt, asphalt, liquid, GRP and lead, em.vaults can span widths up to 6m wide and unlimited length. em.vault purpose made continuous rooflights come in a wide range of profiles and glazing options to meet virtually any specifier and client requirement. em.vault skylights are also deemed a non-fragile rooflight in accordance with (HSE) Health and Safety in Roofworks.
Profiles and sizes
The standard rooflight profile is a rise 1/6 of the width although a higher rise and bespoke profiles are also available on certain sizes.
em.vaults are purpose-made and available in widths from 0.6m (Multiwall 1.5m) to 6.0m and in unlimited length.
em.vaults are constructed from polycarbonate sheet and are available in single, double and triple skin solid polycarbonate and in multiwall construction. Polycarbonate is virtually unbreakable, with an impact strength up to 250 times greater than glass. Aerogel is a multiwall polycarbonate filled with translucent aerogel granules, giving an even spread of diffused light and excellent thermal properties.
Barrel vaults are also available with GRP glazing – our T-Vault range. Click here for more details.
em.vault continuous rooflights can be supplied in Clear, Opal Diffused, Bronze or HeatReflect (which reflects up to 68% of the heat radiation) glazing.
Glazing Specification Table
All polycarbonate em.vaults have a minimum 3mm thick glazing. Inner skin thickness varies may vary.
|Glazing||Light transmission (LT%)||Solar heat gain factor (g%)||Thermal transmission (W/m2K)*|
|Single Opal Diffused||58%||60%||5.36|
|Double Opal Diffused||53%||49%||2.95|
|Triple Opal Diffused||46%||40%||2.03|
|Multiwall 16mm Clear||59%||58%||1.88|
|Multiwall 16mm Opal Diffused||51%||52%||1.88|
|Multiwall 25mm Clear||57%||65%||1.51|
|Multiwall 25mm Opal Diffused||49%||54%||1.51|
*Thermal transmission refers to U-Values. For Ud-Values, please contact us.
em.vault barrel skylights are normally specified to fit to a site formed builder’s upstand although they can, subject to loading calculations, be supplied with the em.curb uPVC range of upstands.
For wide and multiwall em.vault units, we would recommend that a builder’s upstand is formed, rather than a proprietary uPVC curb.
All em.vaults have fixed glazing as standard. However, the options listed below can be incorporated in most permutations of em.vault installations.
|Fire rating to BS 476: Part 3||AA|
|Fire rating to BS 476: Part 7||Class 1 (Class 0 for Building Regulation purposes)|
|Fire rating to 1991 Building Regulations||Tp(a)|
|Service temperature||-50°C to 120°C|
em.vaults have been tested with Vertical and Horizontal forces to enable reliable performance.
em.vaults use polycarbonate glazing and may be independently tested and certified according to EN 14963: 2006: 1200 Joules, and ACR(M): 001: 2005 Class B and be deemed non-fragile in accordance with (HSE) Health and Safety in Roofworks.
All em.vault barrel vault rooflights are guaranteed for a period of ten years. For further information, extended guarantees, or specific project guarantees, contact us.
Operation & Maintenance
Whitesales skylights and rooflights can generally be regarded as ‘maintenance free’. However, the following guidelines should be followed to optimize their usefulness. Any maintenance of rooflights must of course be carried out strictly in accordance with the relevant ‘Health and Safety’ regulations.
em.vaults are fixed at installation stage to the relevant upstand, and are a means of allowing natural light into the area below. Polycarbonate rooflights are available as ‘Non-Fragile’, but should not be trafficked.
Wash only with warm soapy water. DO NOT USE strong detergents or abrasives. Physically check Barrel Vaults annually to ensure fixings are secure.
Electrically operated ventilation is operated by means of 24V DC or 240V AC electric actuators. Electric actuators must be installed by a qualified electrician. Test annually by an Approved Electrical Installations Testing Company. Physically check fixing brackets to ensure fixings are secure.
These are fitted to the relevant skylight component and connected to an unswitched Fused-Spur. A switched electrical supply should be connected by a qualified electrician. Test annually by an Approved Electrical Installations Testing Company.
For more detailed Operation & Maintenance manuals, visit our Download area.
Find out more
Would you like further information? We are here to help. Send us an enquiry with your project details. Direct purchases can be made through our national network of building and roofing merchants. Use our ‘find a merchant’ resource to find a branch in your area.