Crawford B. Deyo, Inc. 

                   We Custom Design Your Poultry, Dairy and Swine Ventilation Needs

Factory Export Representative
Poultry & Livestock
Typical Tunnel
Acme Installations
Baffle Inlet
Inlet Installation
Poultry Curtains

Poultry Curtain Installations

Questionnaire Fans Cooling Baffle Inlets

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Included with your poultry curtains are all parts for a complete installation with the exception of the counterweight which may be secured locally.  The curtains are furnished with a 5cm hem at top.


For installing these curtains, we recommend the following steps:


a)      Install primary 2-1/2” steel strap pulleys [No. 2] at each end of the house, at least 15cm above the top of curtain in a raised position.

b)      Attach a wood strip at the bottom of the wall opening to receive curtain nails [No.12].

c)       Install the winch [No. 1] on a side of house at a convenient operating level (as shown in diagram).


d)      Cable [No. 8] supplied is 6mt longer than the curtain and should be attached to winch [No. 1] take-up roller and led through the primary pulleys with a counterweight (local supply) attached to the end of cable opposite winch.


e)      Lay out curtain [No. 5] flat on the ground and begin at either end to insert the 1.27cm conduit (3mt lengths) [No. 10].  Using a swaged ends join the rods together, insert the rods the full length of curtains.  You may need to cut the last rod in order to achieve the correct length.


f)        Curtain should then be raised to position and affixed temporarily to the house by nails through the hem.  Then the curtain should be placed into the desired raised position.  Using a level will insure proper operation. 


g)      Beginning at either end, the curtain should be stretched downward and tacked into the wood strip as mention in (b) with curtain nails [No. 12].  Make certain that all wrinkles are removed.

h)      Install พ” pulleys [No. 9] spaced at each thumbnut in curtain at least 10cm higher than cable.


i)        Poly cord [No. 3] should be cut in lengths 60cm longer than the height of the curtain, loosely clamp end of cord [No. 3] and cable [No. 8] together (final adjustment to the thumbnut will be made later during assembly).  The other end of the cord should go through the pulley [No. 9]. The distance between each thumbnut should be the height of the curtain.  These thumbnuts must be installed on the same side as the winch [No. 1].


j)        Thumbnuts should now be tightened, and nails indicated in (f) should be removed from top hem.


k)      With a single cord, whose end is tied to the first pulley [No. 6], thread the other end of the cord through rest of the pulleys making up-down diagonal pattern for the full length of the curtain.


l)        Aprons [No. 11] shown on illustration are optional and can be made from extra curtain material.


m)    End aprons, made from extra curtain length, should be tacked to the house in position to extend approximately 15cm to 20cm over the end of curtain as shown in diagram.  These aprons should be loose enough to allow the curtain to operate.


n)      Curtain will now raise or lower with winch operation and will semi-fold at bottom behind Poly cord as lowered.


List of Curtain Components

(Numbers correspond to those shown in Illustration 1)


Winch for raising or lowering curtain


Key or primary 2-1/2" steel strap pulley


Poly cord ผ” (white)


Thumb nut


Poultry curtain

ksheet.jpg (7383 bytes)


Polypropylene cording 3/16” (black)


Counterweight (supplied by others)



Galvanized aircraft cable 1/8”

cables.jpg (7332 bytes)


3/4" Nylon swivel pulley




Aprons (made from extra curtain)



Curtain Nails

roofnails.jpg (10432 bytes)






Back to Instructions



The most common air-leak source is above and below sidewall curtains.  To stop these types of air-leaks, fasten bottom sidewall to wall with a wood strip and install aprons at both ends of the curtain (Illustration 2) as well as an 18” curtain strip over the top of the curtain (Illustration 3).


The “overlap” on the 18” strip will depend on the amount of room there is in the mounting area.





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