How Does it Fill Window Gaps?
Gapseal has been cleverly designed 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 form by stretching it during the installation process. Once Gapseal is in the gap it will expand until it fills the entire width of the gap.
Wooden sash windows contract and expand throughout the course of their life. These variations 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 will mimic the movement pattern of the timber remaining in place retaining insulation.