Self-Fit Guide

3.3 Installing Bay Window Assemblies Structural or Load-Bearing Bay Windows require that individual window segments DO NOT carry any loading.

Support must be achieved by the use of Jack Bay-Poles, which are directly fitted between head and sill, avoiding any question of frame support.

• All Bay Window assemblies are supplied with adjustable jack bay-poles.
• Welded sub-sills are pre-drilled to accommodate the insertion of jack bay-poles through sub-sill.

Bay pole passes through sub-sill

3.4 Sealing & DPC’s
• The purpose of external sealing is to prevent water and air leakage into the property.
• The perimeter gap (see Deduction Differences) should be no less than 5mm to allow for profile expansion and contraction.
• Appropriate sealant materials applied correctly take account of movement between frame and external brick work. For all supplied orders, appropriate sealant is included in the supply pack.
• It is advisable to apply masking tape to the frame and brick work to facilitate a clean ribbon line of sealant. Subsequent tape removal reveals a neat finish.
• When sealing gaps between 6mm and 15mm, the use of a backing material is required.
• Care must be taken to avoid the use of sealant in lintel, sub-sill or face drainage channels.

Joint gaps up to 6mm


Joint gaps from 6mm to 15mm

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