How Does it Fill Window Gaps?
Gapseal sash window gap filler has been cleverly manufactured with thousands of tiny, concealed air pockets which allow it to be compressed by almost 90% of its original profile.
These flexible properties allow Gapseal to be easily fitted into sash window gaps much smaller than its original width by stretching and compressing it during the installation process. Once the sash window filler has been inserted into the gap it will expand until it fills the entire width of the gap.
Wooden sash windows naturally contract and expand throughout the course of their life. These variations often create varying gap widths which can cause alternative methods such as scrunched up newspaper to fall out or absorb moisture which can lead to rotting and discolouration.
Gapseal can easily be removed when the window needs to be opened and is designed to expand and contract with the movement pattern of the timber and will therefore remain in place retaining the insulation.