Close Search
Search
Lorient
Search
Customer Login
0
Lorient UK
Hong Kong
Singapore
UAE
Australia
North America
Open Menu
Close Menu
About Us
Our World
Our Story
Our Team
Our Credentials
Environmental Policy
Quality Policy
Trade Associations
Join Our Team
Products
Fire, Smoke + Acoustic Door Seals
Fire, Smoke + Acoustic Seals
Door Seal Finishes
Air Transfer Grilles
Air Transfer Grilles: Fire
Air Transfer Grilles: Fire + Smoke
Talkback Damper System
Cover Grilles
Intumescent Sealant
Architectural Seals
Drop Seals
Perimeter Seals
Door Bottom Seals
Threshold Plates + Ramps
Compression Seals
Brush Seals
Magnetic Seals
Meeting Stile Seals
Stainless Seal Range
Finger Guards / Drip Guards
AURA Architectural Seals
Door Hardware Protection
Door Edge Protector
Hardware Protection Kits
Letterplates
Wide Angle Viewer
Glazing Systems
Doors
Screens + Partitions
Intumescent Technology
Testing Services
Indicative Fire Testing
Other Testing Services
Resource Centre
Acoustic Centre
Acoustic Search
ATG Knowledge Hub
ATG Product Selector
Brochures + Sample Packs
CAD Library
Certification
Certifire
British Board of Agrément (BBA)
IFC
UL
CPDs
Webinars
Fitting Instructions
Datasheet Library
FAQs
Glossary
NBS Source
Standards + Regulations
Building Regulations
Approved Doc B – Fire Safety
Approved Doc E - Acoustics
Approved Doc M - Accessibility
Approved Doc Q - Security in Dwellings
The Regulatory Reform (Fire Safety) Order 2005
Videos + Animations
Technical blog
Stockists
UK + Ireland
Europe
Architectural Ironmongers
Preferred Installers
Air Transfer Grilles
News
News
Case Studies
Support
Delivery
Opening Hours
FAQs
How To Buy
Contact us
Contact Us
Search
Glossary
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
Search
Search
L
Leading edge
The closing edge of a door which meets the doorframe.
glossary
Close