We offer 3 types of service
Installation at the construction stage — we set and seal the joinery in layers before the plaster and façade go on. Ideal for houses under construction.
Replacing old joinery in an occupied building — quickly and cleanly, usually in a single day, taking the old windows away.
A turnkey service — full reveal finishing, sills and detailing inside and out. Ready to use.
Installation is the key to windows that really protect
Installation is one of the most important stages of replacing windows and doors. Badly fitted joinery — whatever its class — can let in cold, damp and noise. At DOR-JAN we install to the PN-B-13420 standard, using three-layer systems: an internal seal, thermal and acoustic insulation, and a vapour-permeable external membrane. We take care over every detail, because we know the end result is what counts.