IS 4913:1968 is the Indian Standard (BIS) for selection, installation and maintenance of timber doors and windows. This standard provides comprehensive guidelines for the proper selection, safe storage on site, accurate installation, and routine maintenance of timber doors and windows to ensure their longevity and proper functional performance.
Code of Practice for Selection, Installation and Maintenance of Timber Doors and Windows
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Fixing to Structure | Wrought iron holdfasts (min. 3 per jamb), 40x6 mm section, 23 cm long, grouted in cement concrete. | Mechanical fasteners (corrosion-resistant screws) through the frame jambs or using fixing lugs/straps into the structural opening. | ASTM E2112-19 |
| External Weather Seal | Pointing the gap between frame and masonry with cement mortar (1:3) or a specified mastic. | A multi-layer system of flashing, backer rod, and high-performance sealant (e.g., silicone) integrated with the Water-Resistive Barrier (WRB). | ASTM E2112-19 |
| Frame-to-Wall Clearance Gap | Suggested as approx. 6 mm for filling with mastic. | Typically 10-15 mm (3/8" to 5/8") to accommodate shims, movement, and proper sealant application. | General practice in ASTM E2112 / BS 8213-1 |
| Installation Tolerance (Plumb) | Not explicitly quantified; states frame should be 'truly in plumb'. | Typically specified as within ±2 mm per metre of height, or within 3 mm over the full frame height. | BS 8213-1:2004 |
| On-Site Storage | Stack flat on level bearers, not more than 6 units high, in a dry, covered place. | Store off the ground on level bearers, protected from weather. Often recommends storing upright or as per manufacturer's instructions. | BS 8213-1:2004 |
| Maintenance (Repainting Cycle) | Advises repainting 'normally once in 3 to 5 years' for external surfaces. | Guidance is provided by the manufacturer based on the specific coating system used; not typically specified within an installation standard. | General (Manufacturer's Instructions) |