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1. Surveying

1a. Check that the opening is defect free 
and that there is no more than a 10mm 
variance on the diagonal measurements.

1b. Measure the opening at three points 
on the width and height. The smaller of 
each is the measurement that is used to 
determine the aperture size.

1c. When ordering, please specify the 
standard manufacturing size (which ideally 
is the aperture, less 10mm height and 
width).

1d. Check that the internal dimensions of 
the opening allow the full opening of the 
door, and that the door will not be impeded 
by plaster, render or floor covering.

2. Pre-installation

2a. Check the specification

Before commencing the installation, 
make sure that the doorset delivered is 
as required and as specified on the order 
acknowledgement documentation. Doors 
not matching the order acknowledgement 
will not be accepted for return if they have 
been cut into or otherwise reworked. 
Check for damage in transit. 

Any damage must be reported within  
the timescales stated in the Terms and 
Conditions in the current Premdor  
Range Guide.

2b. Check the fitments

Secured by Design doorsets are supplied 
fully prepared with three point espagnolette 
lock, ironmongery and fittings. Some 
components may be supplied loose for 
site fixing. Please check all packaging 
carefully to avoid any item being discarded 
in error.

Cill thresholds when ordered are also 
supplied loose for on site fitting. Where the 
customer or installer uses components 
not supplied by us, we strongly advise that 
these be of high qualityand fully guaranteed 
by the supplier. 

In the case of letterplates, they must be 
correctly fire rated, sleeved and draught-
proofed. Poor fitting or lower quality fitments 
may result in draughts or defects, which 
diminish the heat retention capability and 
durability of the doorset and may invalidate 
the guarantees.

3. Installation of doorsets

3a. Check the dimensions

Make sure that the opening is of suitable 
size for the doorset. The dimensions 
of the opening should be at least 5mm 
greater than the outer dimensions of the 
doorset on all four sides. Take several 
measurements of the width and height to 
ensure that the dimensions are constant. 
Do not force the doorset into position as 
distortion or damage may occur.

Softwood and hardwood doorframes may 
be planned slightly to make them fit. 

The Ecoframe door frame cannot be 
planned to fit. If the Ecoframe doorset will 
not fit the opening the opening must be 
adjusted to accommodate the Ecoframe.

3b. Installing 

The doorset must be installed as a 
complete unit. Use the door as a template 
to “square” the door frame position, 
removing it only to allow for final fixing, 
decoration or protection. All packers 
between door and frame should be left in 
situ while fitting and only removed once 
frame has been fitted squarely into opening.

3c. Important notes

•  Regardless of fixing method – screws, 

bolts, or straps – packing must be 
inserted between the frame and the wall 
at the fixing point. This will avoid frame 
distortion.  

•  It is also important to ensure that a 

packing piece is placed immediately 
behind the three lock striker plates where 
they are positioned in the frame.

•  Frame to wall fixings must be made 

immediately above and below the three 
striker plates and above and below the 
three hinges. i.e. four fixings per side.  
See diagram on page 4.

•  After fixing is complete, ensure that the 

door makes full and uniform contact with 
the edge seals. Check the diagonals 
and ensure that no distortion or twisting 
has occurred during installation. Check 
also that the door does not “bind” on the 
frame when it is being opened or closed.

•  We recommend the use of plastic 

sheathed fixing bolts (M10 x 100mm min).

•  Where fixing bolts are used, the holes 

should be predrilled through the frame at 
the distances shown in the diagram on 
page 4.

•  For a timber frame or Ecoframe use an 

ordinary drill to make a clearance hole in 
the frame and then a suitable masonry 
bit to drill 100mm into masonry.

•  With a suitable masonry drill, bore a hole 

100mm into the masonry. Take care not 
to over tighten when screwing home as 
this may cause cracking and distortion.

•  After final fitting gaps between door 

frame and wall must be filled with 
suitable fire resistant infill and  
sealant capping.

Please note, some movement within timber 
door leaves may occur after installation.

3d. Finishing of doorset installation

Make sure that the door leaf opens and 
closes properly and the locking system 
operates smoothly. Also check that edge 
seals make full contact with the door at 
all points. If needed the keeps can be 
adjusted using a T15 Torx bit.

For Secured by Design doorsets, the 
handles supplied can be fitted to give 
either split spindle or solid spindle mode 
of operation. Please read the instructions 
supplied with the door handles.

Where possible users should engage 
the three security door bolts by lifting the 
handle when the door is in the closed 
position. We recommend that this is done 
even if it is left unlocked. Not only is this 
good security practice when locked but it is 
essential to ensure a good perimeter seal.

Unfinished doorsets should be painted 
immediately after installation using a 
good quality paint system in accordance 
with the paint manufacturer’s instructions. 
This should be a three coat system - 
primer, basecoat and topcoat.

Ecoframe is supplied fully finished  
in white and does not need painting.  
The door may however need painting.  
The protective film on the Ecoframe should 
be removed as soon as possible after 
installation.

Please read the following guidelines in full before beginning the installation...

Installation Guide

2

Premdor SoundSecure Product Guide

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