Construction of Giresun Wastewater Treatment Plant  Tender Dossier Volume 3 Employer’s Requirements Section 09: Building Works  9 of 24 Particular care shall be taken to cure newly applied rendering as specified herein for concrete.  Each coat shall be allowed to dry completely before the next coat is applied.  The finishing coat shall have a wood float finish to true planes and regular curves and to an even sur- face. Arises shall be rounded and in true alignment and a hollow fillet shall be run at internal angles.  Cement mortar rendering with a Tyrolean finish coat for use on external surfaces shall be carried out  as three coat work and shall be applied in accordance with the manufacturer’s recommendations sub- ject to the approval of the Engineer.  Render shall contain a waterproofing agent to the approval of the Engineer.  The Tyrolean finish coat shall be of materials and colour to the approval of the Engineer and shall be  applied by machine.  Surfaces to be rendered shall be prepared and cleaned as specified in the relevant sub-section herein  entitled "Rendering with Plain Finish". Tyrolean finish shall also include plastering and painting work  and on other payment shall be done.  Particular care shall be taken to cure undercoats as specified herein for concrete.  The application of tyrolean or similar finish coats shall be carried out on surfaces shaded from direct  sunlight.  Before commencing work, the Contractor shall submit samples of all types of timber to be used in the  works for the approval of the Engineer. Timber, or carpentry and joinery units of which the material  on delivery to the site does not conform to the standard of approved samples will be rejected and re- placed by the Contractor at his own expense.  External windows and doors shall generally be double glazed in (4+4) mm thick bronze solar control  thermal glass.  Obscure panels to window frames shall be formed in 6 mm thick toughened opaque float glass in ap- proved colours.  Internal screens, doors, inspection panels and aluminium framed glass doors shall be in 6 mm thick  Georgian wired plate glass, or approved equivalent.  All glass shall be cleaned at the completion of construction and any broken glass replaced. The glazing  shall be maintained in a clean condition until the date of handing over the works.  9_Vol3_d4.3_Section 9 building works_en_GIR_rev6.docx  9.1.14.2 Rendering with Tyrolean finish  9.1.15 Timber Works  9.1.16 Doors and windows  9.1.16.1 Glass 