Sub-sill on timber projects


1. Prepare the window opening
Preparatory step for window installation on timber construction projects
Tape and seal the structure surface, window reveals and all joints so that they are airtight and watertight against driving rain.
1. Prepare the window opening
Preparatory step for window installation on timber construction projects
Tape and seal the structure surface, window reveals and all joints so that they are airtight and watertight against driving rain.


2. Side details
In the case of reveal plates or a rear-ventilated structure, allow EXTOSEAL ENCORS to run approx. 10 to 15 cm up each reveal side. If the reveal surfaces are to be plastered, run the sill tape up approx. 6 cm or else to the upper edge of the window sill profile.
2. Side details
In the case of reveal plates or a rear-ventilated structure, allow EXTOSEAL ENCORS to run approx. 10 to 15 cm up each reveal side. If the reveal surfaces are to be plastered, run the sill tape up approx. 6 cm or else to the upper edge of the window sill profile.


3. Apply tape to the sill surface
Apply EXTOSEAL ENCORS to the sill surface, extending it at least as far as the inner edge of the window profile or – if necessary – across the entire depth of the structure. Allow an excess of at least 2 cm on the outside, or else as far as a suitable drip profile.
A sloped wall surface under the window will drain off water.
3. Apply tape to the sill surface
Apply EXTOSEAL ENCORS to the sill surface, extending it at least as far as the inner edge of the window profile or – if necessary – across the entire depth of the structure. Allow an excess of at least 2 cm on the outside, or else as far as a suitable drip profile.
A sloped wall surface under the window will drain off water.


4. Extend the sub-sill to the outside
In the case of a rear-ventilated facade, stretch the tape in the corners (without damaging it) and stick it to a suitable subsurface, e.g. SOLITEX FRONTA WA. Rub EXTOSEAL ENCORS using the PRESSFIX tool to secure the adhesive bond.
4. Extend the sub-sill to the outside
In the case of a rear-ventilated facade, stretch the tape in the corners (without damaging it) and stick it to a suitable subsurface, e.g. SOLITEX FRONTA WA. Rub EXTOSEAL ENCORS using the PRESSFIX tool to secure the adhesive bond.