Installation Guide
Installation on sloped masonry side walls
Side walls in poor condition
If the slopped masonry side walls of your areaway have loose or crumbling masonry 
and are not structurally sound, they can be removed and a door can be installed on 
the new at areaway after a concrete cap is poured. Contact Bilco for guidelines 
on recapping your areaway or log-on to www.bilco.com to nd a certied Bilco 
basement door installer in your area. 
Side walls in good condition
Doors can be installed on side walls if they are structurally solid, have no loose or 
crumbling masonry, and have a uniformly at and level surface on which to anchor 
a door. If your side walls meet these conditions, it is best to return your door and 
use a Bilco Sloped Wall Basement Door (see photo on far right).
*The Bilco basement door is carefully and adequately packed to withstand all normal shipping abuse. 
This information is provided to show how easily minor repairs can be made, thus saving the builder or 
homeowner much unnecessary inconvenience. For additional information or assistance, please contact 
our customer service department .
Page 4
How to correct installation errors or repair minor damage*
Door not shedding water. If your Bilco basement 
door does not shed water, look for and correct 
these installation errors.
1. Header  not  properly  caulked  at  side  pieces. 
Run a bead of silicone caulk along the small 
vertical seams between the header and side 
pieces (see instruction 2  on page 2).
2. Doors do not fully close. Stand on steps and 
slowly  close  each  door  to  see  if  the  bottom 
ange of one or both is binding on the concrete. 
Chip away or rub down excess concrete with 
mason’s  stone  so  ange  is  not  obstructed. 
Refer to instructions at right for adjustments if 
required.
3. Masonry not high enough. The masonry under 
the Bilco basement door should be 4” higher 
than the surrounding grade and concrete should 
be level so water cannot accumulate in front 
of the sill.
4. Water seeping between steel and masonry. Door 
should be caulked all around the exterior where 
the steel and masonry meet, as well as where 
the  unit  joins  the building  wall.  If  side  pieces 
have been buried in concrete, the unit should 
be removed and stairwell recapped so that the 
assembly rests on top of the areaway.
5. Blocked header channel. Make certain channel 
is clear. Any blockage in this channel will cause 
water to overow the header.
Doors  Out  of  Alignment.  This  is  caused  by 
failure to align the doors and square the frame as 
instructed. With doors closed, sight across bottom. 
Remove door that is higher than the other. Hold 
vertically with top edge on the ground as shown 
in Figure 1 below. Strike each hinge three or four 
solid blows with a hammer. This bends hinges 
in the direction of top of door, thus lowering it to 
line up with other door. If additional adjustment 
is  necessary,  remove  lower  door,  place  lower 
end  on  ground  and  strike  each  hinge  with  a 
hammer. This bends the hinges in the direction 
of the bottom of the door, thus raising it to line 
up with other door.
Doors Not Seated Properly. If doors do not seat 
themselves properly or bounce slightly when in 
closed position, and bottom anges of doors are 
not obstructed by concrete in front of sill, apply 
lubricant such as WD-40 to hinges, then refer to  
STEP 2  on  page 2 and  check frame for  plum 
and square. Hinge can also be adjusted to get 
the door to seat properly. From below with door 
open three-quarters of the way, insert a screw-
driver along side of hinge as shown in Figure 2 
Bilco Basement Door 
Warranty
Bilco Basement Doors are designed 
to operate to the customer’s 
satisfaction and to provide years 
of trouble-free service. Should a 
part fail to function in normal use 
within a period of ve (5) years 
from the date of purchase, a new 
part will be furnished at no charge. 
Finish warranty voided if doors 
are not painted inside and out per 
instructions in STEP 5 on page 3 
within (45) days of installation. 
below. Pull door down on it to a point where you 
feel pressure of the screw driver relieving bind-
ing condition. 
Hinge Damaged. A hinge can be bent downward 
by mishandling during shipment or by someone 
trying to force the door closed without releasing 
the hold-open safety latch, and as a result the 
door  does  not  t  properly  on  the  frame.  Such 
damage to a hinge can be identied by a bump 
on the top of the door. To correct, remove the 
door from the frame, place it on the ground with 
the  hinge  side  up  and  step  downward  on  the 
hinge to bend the pivot point back to its correct 
location (see Figure 3 below). The other hinge 
on that door, which has not been damaged, can 
be used as a guide in bending the hinge back to 
the proper place.
Door Warped or Bent. Place the end of  door 
on a block or bottom step of a nearby stairway, 
and step down on it with your foot. Door can be 
bent back to the original shape very easily, but 
when it’s installed on the frame and supported 
all around it’s extremely strong and will not bend 
during everyday use (see Figure 4 below).
Figure 1 Figure 2
Figure 3 Figure 4
Bilco Customer Service
(800) 854-9724
(Mon- Fri)
www.bilco.com




