Thanks for your input. I also found this website
which has this to say about dimples.
"Nailing: Best results are obtained using 18 gauge pneumatic T-nails.
Air pressure should be 90-110 psi. If a rim or lip of raised material
is created around the nail hole (volcano effect), remove the driver
from the nail gun and remove any burrs on the tip using a fine metal
file. The rim is caused by burrs on the nail gun driver pulling
material out of the nail hole as the driver retracts."
Thought you might find it interesting.
I just installed a bunch of MDF base ans trim. For baseboard you will need a
15 or 16 guage nailer. The 18 guage does not have enough holding power. I
have both 18 and 16 guage nailers, and rarely use the 18 guage nailer. Use
the longest nails that fir the gun, two inch minimum when nailing through
base, drywall, and into studs. Longer will be better yet, but 2 inch will do
the job fine.
The MDF will raise up a bit when nailed, figure on sanding and finish
painting after installation.
If you use the niler for door trim nailing into wood you can get by with
shorter nails, seems to me I used 1-1/2 inch when nailing the trim into the
door frame, and back to 2 inch when nailing into the wall.
Thanks for all the replies.
Something unusual about my situation. The house is built late 50's.
The "drywall" starts above the floor plate. Where I have removed the
old baseboards (on internal walls on first and second floors), I can
clearly see what I think is the edge of the floor plate. Solid wood
about 1 3/4 inches thick above the subfloor.
(New and old baseboards are 2.5 inches high. I don't think I need to
nail into the drywall above the floor plate to hold the baseboards to
Based on what I think I am hearing so far, with 5/8 baseboard plus 3/4
to 1 inch bite, I need 1 3/8 to 1 5/8 inch nails. That rules out some
of the lower end brad nailers. Some 18G brad nailers do go up to 2
inch but I've heard those brads sometimes bend going in. And since I
don't intend to use glue, I will need all the holding power I can get.
So, it will be 16G finish nailer with 1 1/2 or 1 3/4 inch nails.
Probably will rent a Stanley Bostitch from HD to try.
Yes, I did think of trim screws. But I think that unless I predrill
and countersink, the dimple/volcano would be huge and require a bit of
sanding to remove. If I have to do it manually, I think I would just
use a hammer.
Ditto what you said but I'd keep a handful on hand just
incase the Nancy nails won't cut it.
By the way, in old wooddorking machinery restoration the
dimple/volcano is referred to as a Vesuvius. A Vesuvius or
two can sometimes be quite helpful for parts requiring a
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