3
• Close tightly against the gasket using turnbuckles,
tarp straps, lag studs with wing nut, etc.
Remember: There will be considerable expansion
and contraction during kiln use so it is imperative
to plan your kiln door construction accordingly.
While outside electronic moisture meters can be
used to avoid entering the kiln, during the drying
cycle, Wood-Mizer strongly recommends
regular checks inside the kiln to visually
inspect the surface or ends for checks, mold,
stain as well as testing with a hand held meter.
Construction Guidelines
Please reference Chamber Plans for more information
on construction.
Step 1: Build all walls, ceilings and floors with a 2” x
4” framework using blue or pink Styrofoam (extruded
polystyrene) friction fitted between the studs.
Step 2: Cover the interior face of the studs with a
1” layer of Celotex Thermax ( for better results overlap
two ½” layers).
Celotex Thermax is foil faced polyisocyanurate
(urethane) board which is orange or yellow in color
and is available in 4’ x 8’ sheets of various thicknesses.
Celotex Thermax is a trade name, similar products
under other trade names are acceptable.
Note: If you want to use spray foam insulation, only
use urethane based spray foam applied at 2.2lb/cu
ft. Fiberglass is never recommended.
Step 3: Caulk joints and nail heads with a high
temperature silicone (optional: apply aluminum
tape over silicone)
Step 4: Cover Thermax with one or two layers of 6
mil polyethylene, then enclose with ½” CDX or marine
grade plywood.
Step 5: Coat CDX interior surface with “mobile
home or metal roofing aluminum paint”
Note: Paint is an asphalt based coating with powdered
aluminum and fiber for strength, available in most
hardware stores. Re-coat as necessary every year.
Step 6: Finish exterior walls to suit your tastes, but
avoid galvanized steel or other ferrous sidings.
Once you have completed construction of the kiln
chamber install the following air deflectors and
baffles to control the airflow within the chamber.
Baes and Deectors
Do not underestimate the effect of baffling. Correct
baffling will result in faster and more even drying.
The benefits more than offset the extra time and
effort to correctly place the baffles.
• Corner deector: typically made of plywood
are used to help turn the airflow.
• Top Bae: Hinged baffle that falls from the fan
wall to the top of the load used to compensate
for different load sizes, and allow for shrinkage
of the board pile.
• Side Bae: Baffle that closes in the open space
when lumber that does not fill the entire width.
This baffle can be fixed or portable.
Please reference pg 14 for more information on
deflectors and baffles.
Power Vent
The Power Vent is to be secured to the inside of
the kiln wall with the fan side facing the exterior.
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