Thermlock

Norfolk Frames systems uses a patented and unique reinforcing system - Thermlock ® - which provides greater strength, better window security and better thermal performance than traditional reinforcing.

Conventionally reinforced three chamber profiles struggle to beat the 2.0W/m2K requirement under current Part L regulations (England) and Park J (Scotland).

Beats 1.8W/m2K - a part J (Scotland) requirement since March 2003 without the need for costly soft-coat glass.
35% stronger than standard aluminium on deflection strength.
900% better than steel - on torsion strength
20% more secure windows - screw pick up ridges make fixing easier. Thermlock delivers 20% greater pull-out strength on handles, keeps, shootbolts and hinge fixings.

Thermlock

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