[MassHistPres] Fwd: water sealant / primer

[Garrett Laws]

Attached is a recommendation for a "water repellant preservative" I received
from a client in Brookline, MA. The National Park Service is supposedly
where he discovered it.

Trim on the exterior of his house looks NEW (although it is 100+yrs old)
after this product, a good primer and then good paint were applied six years
ago.

Garrett

---------- Forwarded message ----------
Date: Monday, June 20, 2011
Subject: water sealant / primer
To: Garrett Laws <copperandslate at gmail.com>

HI Garrett,

Water repellent preservative (WRP) undercoating seems to have the best
percentage improvement on woods such as fir or pine that don't necessarily
take paint very well.  Apparently lots of window mfrs pretreat their
products this way.

Here is a link on Amazon to the product I use.  It is a water repellent
preservative that is formulated to be covered with paint, which means the
waxiness is lower than stand-alone products.

I sand wood with very coarse paper before treating and painting - I think I
used 60 grit. You have to be sure to follow directions for WRP, really
focusing on end grain and be sure to give it ample drying time before
applying paint.  I used an alkyd primer followed by two or three latex
topcoats.  I've been sensing that people are now getting equally good if not
better results with latex/latex applications and also that the new
primerless latexes are very promising.  We used them on the barn and they
are very thick - they are meant to be applied more thickly than conventional
paint.

Mill glaze can mess up a good paint job, and it's not that easy to get rid
of it.  Only other thing that messes people up is allowing the wood (or
primer) to weather before painting.  Even two weeks of exposure to UV rays
damages the surface of bare wood causing poor paint adhesion.  You have to
resand if that happens (reprime also if you had prematurely primed) .

http://www.amazon.com/Woodlife-Classic-Wood-Preservative-00903/dp/B000C029TI





-- 

Cheers,
Garrett

The Copper & Slate Company, Inc.
Fine Roofing and Exterior Finish Carpentry
238B Calvary Street, Waltham, MA 02453
(781) 893-1916

What we do:
http://picasaweb.google.com/copperandslate

Where we've worked over the years:
http://maps.google.com/maps/ms?ie=UTF8&hl=en&msa=0&msid=206210316541901083869.00049065ef8543e1ef9c3&ll=42.40115,-71.126862&spn=0.125241,0.289421&t=h&z=12
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.cs.umb.edu/mailman/private/masshistpres/attachments/20110806/08c0a569/attachment-0001.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: wood preservatives.pdf
Type: application/pdf
Size: 1592352 bytes
Desc: not available
URL: <http://mailman.cs.umb.edu/mailman/private/masshistpres/attachments/20110806/08c0a569/attachment-0001.pdf>