LumberJocks

What type of wood or material is best for a shelf 12" above radiant heater?

  • Advertise with us

« back to Wood & Lumber forum

Forum topic by Allen78 posted 02-06-2015 09:35 PM 731 views 0 times favorited 3 replies Add to Favorites Watch
View Allen78's profile

Allen78

5 posts in 669 days


02-06-2015 09:35 PM

Topic tags/keywords: question--heat tolerant material

I’ve been asked to build a 12” by 30” shelf that will be mounted to a wall about 12” above a radiant heater. I expect the temperature of the undersurface of this shelf will be 105 degrees or better through most of the winter. What’s the best material to use? MDF? Plywood? Something else? the finish will be paint….any suggestions there? Outdoor house paint? Thanks….


3 replies so far

View bobro's profile

bobro

308 posts in 774 days


#1 posted 02-06-2015 10:24 PM

The painted larch boards about 2 inches above the radiators in our place are straight, flat and uncracked since whenever they were put in, probably the 1970s. (Originally the place had a big ceramic wood stove, 19th century building). About 1 1/4 thick boards.

You can think of it this way: Finnish sauna. Good clear spruce (Nordic or Siberian, maybe Canada and Alaska have similar?), cedar.

Don’t know what kinds of paint have been on them over the years but they’re flexy, so I would think interior/exterior latex should be just fine.

Size the ends thoroughly because moisture exchange is much greater on end grain.

How are you going to mount to the wall?

-- Lao Ma: You are so full of anger and hatred. Xena: Everybody's gotta be full of something.

View Allen78's profile

Allen78

5 posts in 669 days


#2 posted 02-07-2015 04:29 AM

Well, I suppose the trusses in my attic survive some pretty serious heat…. “Size” the ends: you mean an extra coat or two or primer and/or top coat of paint? Shelf brackets, nothing too fancy, for attachment to the wall….not my call.

View bobro's profile

bobro

308 posts in 774 days


#3 posted 02-07-2015 07:34 AM

Yes, when you prime you want to make sure any end grain is well filled and covered. That’s actually the function of breadboard ends on table tops: to cover the end grain. Heat and cold in and of themselves have little effect on wood movement, and keeping wood always either hot OR cold doesn’t do much, but with wood near a heater, what you get is big changes of temperature which turn the moisture exchange off and on in a heavy-handed way, so to speak. And that is a recipe for turning a board into a pretzel or cracker.

So, well primed and painted on all six sides.

The brackets should have elongated or oversized holes if the shelf is screwed to them.

-- Lao Ma: You are so full of anger and hatred. Xena: Everybody's gotta be full of something.

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com