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Click on a circle to reveal technical specifications about the detail. Click on the small conservatory to enlarge and view further technical details.


Over the past 30 years Bartholomew have selected the most suitable materials and developed a range of unique design details that now comprise a tried and tested high quality specification. Although our conservatories are always custom made to suit a particular site and client, and often include innovative detailing, generally they incorporate many of these standard features.

Various hardwoods are used including Utile for durability and Tulip wood for stability.
Composite boards are used for insulated panelling and wide jointless window boards and seats.
American and European Oaks are used when specified.

Any BS or RAL colour finish can be provided along with a variety of natural stain finishes.
Normally joinery material is 2 coat sprayed prior to leaving the factory with non-toxic water based microporous paint or stain.
A final coat is applied on site after completion of the installation.

All double-glazed units incorporate safety glass and conform with BS 6262, and the latest L regulations.
Specifications vary according to site conditions, location and orientation.
Glass types available include the following:
• 4 or 6mm Toughened (for safety and security).
• Soft Coat Low Emissivity (for improved insulation) as standard*.
• Self Cleaning Glass- Pilkington Activ or St. Gobain Bio-clean.
• Bronze, grey or green Anti-sun (for solar control and glare reduction).
• Opaque glass (for privacy and security).
• 15mm and 22mm Pyrostop (for 30/60 and 60/60 fireproof glazing).
• 16 or 20mm bronze or silver spacer bars are used in sealed unit construction.
*U value 1.4W/M2K as standard. U value 1.2W/M2K when Argon filled.

A maintenance free roof is provided by our unique aluminium glazing bars. These are finished with a white or bronze electrolytic coating and incorporate Neoprene weather-tight seals. RAL, or other colours can be powder-coated if possible to match the timber finish.

Opening windows are preferably side hung to give the best uninterrupted view and maximum ventilation. Alternatively, windows can be top hung.
Roof ventilators of the fanlight type can be single or double width. Operation can be controlled manually by cranked winding pole.
Electrically operated openers can be simply switched to open and close or be controlled by room thermostat.
Antisun solar control glass can be incorporated to reduce heat gain and glare.

Doors are hung on 100 x 100mm or 100 x 150mm projection butt hinges to maximise clear opening.
Polished brass handles, fasteners, bolts, stays and cabin hooks are fitted as standard but alternatives including chrome and black iron can be provided as specified.
Windows are fitted with mortice security locks if required.
Doors are fitted with insurance rated 5 lever mortice locks.

Extruded aluminium gutter system - flush-jointed components in various profiles.
Extruded aluminium downpipes with collared joints bring rainwater to ground level.
Paint-finished or powder-coated where possible to match the joinery.
Black or white PVC and other systems to match existing can be provided as specified.

Roof junctions with other structures are flashed with lead (Code 4). Box and valley gutters are lined with either lead or EPDM as conditions require.