Announcement

Collapse
No announcement yet.

Thickness of exterior trim used with cedar shingle siding

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Thickness of exterior trim used with cedar shingle siding

    Eastern white cedar shingles at 5" exposure for a shingle with 3/8" butt thickness, build up to a total thickness just shy of an inch.

    I have used plenty of 5/4 (1" net) trim in wood and composite with shingle siding, and would rather use a thicker trim arrangement this next time.

    Was thinking of saving a little cost in materials, but adding a little in labor, going with 4/4 material (3/4" net) boosted out with some scrap 7/16" OSB.

    With this arrangement, my casings and other stuff would be about 1/4" proud of the shingle butts, and under the laps, where the shingle build is a little more than 1/2" and closer to 5/8", one could never peek into a hole and see a gap or a hint of OSB.

    All this, because there is no availability of 1.25" thickness trim in cedar or composite, and I certainly don't want to use 2x (1-1/2" net) material.

    What do you think?

  • #2
    Re: Thickness of exterior trim used with cedar shingle siding

    I've done build ups like this before. Normally rip cedar instead of using OSB.

    Tom
    http://chicagocraftsmen.org/2011/06/261.html

    Check with the AHJ, what we say doesn't matter.

    Comment


    • #3
      Re: Thickness of exterior trim used with cedar shingle siding

      Bad idea. OSB swells and rots like crazy.

      Good idea: Get a box of 1/4" plastic shims. Space them along the back of your trim pieces and tack them in place with stainless staples. Size and orient them so that the inside 1" of your trim does not have any shims on it. Lift and install trim as usual.

      Presto, you have padded out your trim, made a rainscreen detail, and corrected for the material buildup on window flanges.

      Comment


      • #4
        Re: Thickness of exterior trim used with cedar shingle siding

        What's wrong with 2x material? I've used it countless times for the same detail. You have to account for the flange buildup, but thats two runs through the TS. I think the 1 1/2" looks better, is more stable and same labor.

        Comment


        • #5
          Re: Thickness of exterior trim used with cedar shingle siding

          Originally posted by aerieandy View Post
          What's wrong with 2x material? I've used it countless times for the same detail. You have to account for the flange buildup, but thats two runs through the TS. I think the 1 1/2" looks better, is more stable and same labor.
          LOL. You must be a lumber salesman, or maybe a one-percenter. Cedar grows as trees, but money doesn't grow on them

          Comment


          • #6
            Re: Thickness of exterior trim used with cedar shingle siding

            We commonly use 1/2" treated plywood as a packer behind window surrounds. It seems to work pretty well.
            Eldon Builders on facebook. http://www.facebook.com/pages/Eldon-...02809066463063

            Comment


            • #7
              Re: Thickness of exterior trim used with cedar shingle siding

              A few suggestions.... If you want to use a composite, Azek does make a product that is a full 1 1/4 ". It is known as "Azek to mill" or ATM. Ask your supplier for info and pricing. The good thing is that it does come 18' long. I have used it to run some exterior crowns and create buildups for decorative corbels.

              If you want to build out the thickness of a standard wood 1"x material I would add strips at the edges only. This gives the finish piece of trim the ability to dry on the backside, just like vented rainscreen approach for siding. Maybe not such a big deal if you can get all VG trim but certainly helps if you have flat or mixed grain as the only trim that is available or is all the budget can cover.

              I also would advise against osb for buildout. Too much work goes into doing a cedar shingle job to goof up on the trims.
              "ALS IK KAN" - Stickley

              Comment


              • #8
                Re: Thickness of exterior trim used with cedar shingle siding

                Agree with NW, I would not use osb. It just isn't durable if it every gets wet. I'd be fine with rips of zipwall or PT plywood. Or other material with durability if it took some water.

                Comment


                • #9
                  Re: Thickness of exterior trim used with cedar shingle siding

                  I concur with not using 2x cedar b/c of price and also b/c of the fact that we usually have trim rough side out.
                  “Racism is man's gravest threat to man - the maximum of hatred for a minimum of reason.”
                  Abraham J. Heschel (Jewish theologian and philosopher, 1907-1972)

                  Comment


                  • #10
                    Re: Thickness of exterior trim used with cedar shingle siding

                    We used to rip one side of the 1x4 corner trim down to 2-3/4" so that the corner was 3-1/2 wide on both sides once you butt the ripped piece to the full piece. Then we would take the ~3/4" drop off from that rip and rip it into two equal pieces and use that as a "build out shim". All of the jobs we did were lapped siding that would come out with beat up 1x cedar on the bottom for packaging so we made use of that stock as well. Check with your supplier. They may have some damaged stuff they could give you to rip spacers from.
                    Darrel Hunter

                    "You can't build a reputation on what you are going to do." - Henry Ford

                    Comment


                    • #11
                      Re: Thickness of exterior trim used with cedar shingle siding

                      Is it just me, or is most cedar 1x(4/4 S1S2E)stock a big disappointment these days. Most of it is sapwood, and the rough side looks like it hit a bandsaw blade while still wet at 100mph(probably did). There is no rough "wood grain", just a bunch of fuzz which once painted looks more like stucco than wood.

                      For entry doors I like to plane down 2x cedar stock, and rabbit 1/2" along the outside. The pre-built unit replaces the brickmold/trim combo, place it over the opening and mark it's location. Take it down and plane down the top 1/4" of the lap siding before screwing it in place with GRK trim screws.

                      Yes it takes longer, but for a front door it's worth it. The built up method using rips of cedar works well too, but is more time consuming if you want a invisible glue line rip, and I question it's longevity.
                      Last edited by Kevin Stricker; 11-04-2012, 10:29 AM.

                      Comment


                      • #12
                        Re: Thickness of exterior trim used with cedar shingle siding

                        Originally posted by Kevin Stricker View Post
                        Is it just me, or is most cedar 1x(4/4 S1S2E)stock a big disappointment these days.
                        Not just you, it is a disappointment.

                        Tom
                        http://chicagocraftsmen.org/2011/06/261.html

                        Check with the AHJ, what we say doesn't matter.

                        Comment


                        • #13
                          Re: Thickness of exterior trim used with cedar shingle siding

                          No disappointment here. None at all. We've a couple of yards that get and stock the finest WRC and doug fir and western spruce I've seen.

                          And if you have a project to do with a bunch of cedar, as in shingles, trim, beams, etc., I highly recommend Bear Creek Lumber in Winthrop, WA, that ships as far from their SE WA location as Maine and Florida. And Maine's got lumber and forest, and so does FL, especially cypress.

                          Bear Creek will never disappoint the most demanding customer.

                          Comment


                          • #14
                            Re: Thickness of exterior trim used with cedar shingle siding

                            Our 1x is all S4S and aside from damage from forklifts and banding it seems as good as ever. Costs a lot (as it should).

                            Comment

                            Working...
                            X