Door Seals: Sound and Heat Insulation, Types, Selection
Door seals play a decisive role in a building's comfort, energy efficiency and acoustic comfort. A properly selected seal fills the gap between the door leaf and the frame, preventing the passage of air flow, dust, moisture and external noise. As NUR KAUÇUK MMC, we manufacture long-lasting door seals for various applications.
Functions of door seals
A door seal performs two main tasks: heat insulation and sound insulation. In terms of heat, the seal reduces energy costs by preventing the loss of heated or cooled air. In acoustic terms, a tightly closing seal cuts off the air bridge through which sound waves are transmitted.
How heat insulation works
A large portion of heat loss occurs through small gaps along the edge of the door. When the door closes, the elastic seal deforms to completely fill the gap and stops convection currents. This helps keep the indoor temperature stable between 18 °C–22 °C in winter.
The principle of sound insulation
Sound passes through even the smallest cracks. Multi-chamber or double-lip seal profiles significantly improve acoustic performance by lengthening the sound transmission path and closing off air leakage.
Types of door seals
- EPDM seals — high resistance to weather conditions, ozone and ultraviolet rays. An ideal choice for exterior doors. Details: what is EPDM rubber.
- Silicone seals — wide temperature range and high elasticity. Used in fire-resistant doors.
- TPE and PVC seals — an economical solution, suitable for interior doors.
- NBR seals — predominate in industrial doors that come into contact with oil and fuel.
Profile shapes
The seal profile is selected according to the application: the P-profile is suitable for medium gaps, the D-profile for larger gaps, and the E-profile for narrow slits. A self-adhesive backing strip makes installation easier, but for permanent solutions, profiles seated in a channel are more reliable.
Tips for the right selection
When choosing the right seal, accurately measure the size of the gap and take into account the application environment (interior/exterior), the temperature range and chemical effects. Low-quality material hardens and cracks in a short time, and the insulation is lost. You can read in detail about our production process on our production page, and you will find our quality control standards in the quality section.
Similar principles apply to window systems as well — on this topic, see our article window seals and energy saving. For facade joints, choosing facade seals will be useful.
To choose a door seal suitable for your project, get acquainted with our wide product range and contact us for technical advice.