Page 3 - AHI - MTC Test Quick Guide - Jan 21

Safety, Health, Environment & Quality (Anglian Home Improvements)

Installed safety glass in critical locations should be indelibly and legibly marked in such a position that
the whole marking is visible after installation. The glass should be marked with the following:
• The name and trademark of the manufacturer, merchant or installer; • The identifier of
the product standard that the safety glass conforms to;
e.g. BS EN12150, BS EN 14449, etc;
• The classification according to BS EN 12600.

Approved Document L – Conservation of Fuel & Power
To comply with the 2010 edition of Approved Document L1B, replacement windows should comply with
one of the following:
a) Window Energy Rating minimum (WER) band C
b) Whole window U-Value maximum 1.6 (W/m²·K)
c) Centre pane U-Value maximum 1.2 (W/m²·K) (For exceptional circumstances only
e.g. historic buildings or unique windows).

Currently for registration of replacement doors through the competent persons scheme, only doors
with greater than 50% glazing must be registered.

Approved Document M – Access to and use of Buildings

The requirement of Part M is that you should not make the building less accessible than it was before
the installation. The height of the sill for a door should not be made worse. In practice there is often a
compromise between compliance (not make access worse) and performance (weatherproofing).

The principal entrance to a dwelling should ideally have a clear opening width of 775mm. When
replacing the principal entrance door every practicable effort should be made to retain the maximum
width. The clear opening width is taken from the edge of the frame on the latch side to the face of the
door leaf when open at 90°.

General Installation Points of Note:

Sub-sills should be installed such that there is an adequate overhang of at least 25mm from the face of
the building.

If the DPC is damaged, then it must be repaired or replaced

Screws should be sized to penetrate at least 25mm into timber, or 40mm into plugged holes in brick,
block, or masonry, unless equivalent demonstrable provision can be made by other means.

Fixing PVC-U windows and doors
Where possible, all four sides of the frame should be secured as follows: -
• Corner fixings should be between 150 mm and 250 mm from the internal corner.
• No fixings should be less than 150 mm from the centre line of a mullion or transom.
• Intermediate fixings should be at centres no greater than 600mm.
• There should be a minimum of two fixings on each jamb.

MTC Test Quick Guide Page 3 of 6 Jan 21