Where’s the job?

Scope of Works

• inspect external and internal window seals, frames and adjacent fabric to locate leak source

• remove failed silicone, glazing tape or loose sealant and prepare surfaces for resealing

• replace damaged glazing beads or minor sections of timber cill/trim where necessary

• apply appropriate external or internal sealant (silicone/polyurethane) and reinstate beads or foam tape

• carry out a basic water test and drying where safe to do so and check for mould or hidden timber rot

• use appropriate PPE and containment for dust or mould and advise on further works such as scaffold or frame replacement

Typical Cost

Time on Site

Most simple resealing jobs take 1–3 hours on site; replacing timber cills or several windows typically extends to half a day or 1–2 days. Factors that extend time include restricted access, need for scaffolding or MEWP, discovery of rot or internal damp, and adverse weather for external work

Questions to Ask Your Tradie

• how will you identify the exact leak source and what diagnostics do you include in the price

• do you provide a written estimate and what is included (labour, materials, disposal, access equipment)

• what warranty do you offer on sealant and workmanship and how long does it last

• will you need scaffolding or a MEWP and how will that affect timing and cost

• are you insured for public liability and accidental damage and can you show certificates

• do you include removal of old materials and will you tidy and vacuum internal work areas

How to Avoid Surprises

• clear access to the external side (garden, balcony or neighbour notification) and advise if keys or fobs are needed

• reserve a nearby parking space for the van and any scaffold deliveries to avoid delays

• check with freeholder or building management about scaffold/working‑at‑height permissions for flats

• move fragile items and cover floors near the work area and tell tradie about pets or occupants with mobility needs

• have photos of internal stains and note when leaks occur (after rain, only at high wind) to speed diagnosis