It s not uncommon for a gap or crack to exist where the two doors come together.
Hot to weatherproof french doors.
Unlike the traditional single pane wooden patio doors which lost heat through poor insulation and design modern timber patio doors retain internal heat through sealed doubled glazed units and draught exclusion whilst retaining all the charm of traditional french doors.
The french door may be sticking because of wood expansion or swelling.
The sills for hinged doors can usually be adjusted with a screwdriver in just a few minutes.
Upvc doors are more likely to discolour over time and it s harder to give them a fresh lease of life when that happens.
Check the amount of debris to establish the tightness of the seal.
Put a piece of white paper between the bottom of the door and the threshold close the door then pull the paper out slowly.
Remove old torn gaping weatherstripping foam.
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You can create a double seal by putting tube baskets with metal backing on the outside of the door.
If using v seal weather strip cut them with.
Tack the strips in place and open them slightly to create a tight seal.
Clean the door frame with all purpose cleaner and a rag.
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Install weatherstripping by pushing it against the door to make a snug seal and adhering it to the outside frame.
Cut them to length.
Because one or both of the french doors are moving many traditional weatherstripping solutions just don t apply.
Install adhesive weatherstripping foam around the door frame where the french doors touch the frame.
With the door closed take measurements of the top and side of the door from the outside and cut adhesive backed plastic polymer weatherstripping to these lengths.
Cut weatherstripping foam to the length of the sides and top of the door frame then peel off the adhesive backing.