Again, thanks for your help! 1) I think it’s vital to seal any joints around a window to prevent moisture infiltration but I’m not a window expert. Not knowing the amount of stain on the trim, I’d recommend three possible solutions. The big question I have concerns filling the nail/screw holes left after installation of the PVC trim boards. I would like to paint over the trim and caulk with exterior latex. The rock rests on a 1.5 inch wide strip of pvc lath strip that will be covered by the beaded panels and attached and sealed to it. I plan on using some type of flashing on the interior corners of the walls prior to putting the PVC sheet on just in case the caulk would ever become compromised. Visit the FastenMaster website to find a dealer in your area. I’m guessing the slow or laminating grades may be best. However, that decision is up to you. When bonding to wood we recommend Liquid Nails Sub-Floor or Liquid Nails Heavy Duty Construction Adhesive because we have conducted independent ASTM testing of these products and others and find them to be superior when bonding cellular PVC to wood. Is the sash fixed in the frame or is it operable (single hung, double hung, casement)? Good luck with your project. I’m not talking the box temperature I’m talking the temperature of the product at the mid-point of the core. However, you’ll never seal the edges 100% using this technique. The absence or inadequate waterproofing in this areas can lead to variety of problem like leakages in ceilings below terrace floor, dampness in parapet walls or seepage in the terrace slab. We’ve used the same blankets to bend decking. We are installing trim around our windows with the brick mold that has the J-Channel attached. We have well water that had a lot of rust in it before it was treated however it is now very soft and clear. It’s also solvent based which is ideal for bonding to cellular PVC. I hope you found this response helpful. Assuming this is true they are MS Silicones that cure from the humidity in the air. Two things to keep in mind. What can be used to repair this gouge? It’s not done yet but close enough to show. I have replaced garage door trim and seal with a PVC trim/seal product. OSI’s SF450 does not list PVC on their list of substrates to adhere. Just about any 100% acrylic latex, or 100% acrylic latex with a urethane additive, can be used to achieve superior coating durability and flexibility. If I can be of any further help concerning PVC trim application or installation issues please feel free to send them to me on thisiscarpentry.com. Thus no special air circulation or filtering system is need in the plant where we cut, rout, and mould cellular PVC. Thanks. It can also lead to the trimboard fusing together behind the cut. As for installation guidelines I’ve been told PVC trimboards need to be secured with Tapcon fasteners in a exterior stucco wall application. Let me know if you have any further questions concerning cellular PVC trim. Just Google NPC Sealants. Thanks for your help. Use 8d stainless steel annular shank nails, or screws that are designed for wood trim, and are long enough to penetrate the solid substrate a minimum of 1 1/2 in. You can buy edge banding any width, any color and in a PVC substrate. Other good sealants include Quad by OSI and Solar Seal #900 by NPC Sealant. My concern is the contractor used galvanized screws and the galvanizing has peeled off exposing the steel screw which is now coroding. Love the result! fascia, frieze, rake). However when preparing parts on a CNC router you have to use the proper bits. Our tub is a standard in a raised wood platform. It is caulk gun applied and can sculpt to match the contour of the existing surface. My question is how best to form a 1/2″ Versatex sheet of that width to conform to the inside of the arch. Since this is an interior application, we would use modified silicone sealants such as Quad MAX or WeatherMaster. The urethane chemistry is very compatible with PVC. There are three types of PVC TrimWelder Adhesives. I noticed when starting to prep that the latex paint around the door did not adhere well to the silicone caulk used previously to seat the old trim. Thanks so much for this site and the benefit of your vast knowledge on the subject. I have seen cellular PVC used in foyers, hallways, mud rooms, bathrooms, laundry rooms, basements and garages. You want to be sure not to get any on the faces of your work. Hi John, I would like to create a shiplap look in my mudroom and bathroom using Versatex WP4, because of it’s abilities in higher humidity and will not absorb moisture like a wood wp4. If not, what stipulations should we give the carpenter about how he should install the PVC on our stucco walls? When it does, you either have to patch it or replace it. my wife wants the house done. Can I use a double sided tape as she does not want to paint or see nail holes? provide a rounded-over edge on the top side, say 3/8″ rad.? One said to use brush bond ( like in your blog – clean/fix the cracks & screed/apply brush bond/then screed over it). Since I have a bit of a gap between the two, I’m wondering if I can belt sand the versatex and wooden sill to make them a bit more even/smoother? The slab must also dry to a specified level of moisture before flooring materials can be installed on top of it. We did both but with no real remedy. Your question is an easy one. Other equipment used to elevate the temperature of cellular PVC trim for thermo-forming includes a wall paper steamer with a piece of PVC pipe and two pipe caps and a pair of torpedo heaters and length of insulated duct pipe. The caulk failed after a few years and water leaks in. We have PVC edging along our white kitchen cabinets (around 25 years old) that has yellowed. When you cut, rout, mould or mill cellular PVC, you break open a layer of these cells but you do not affect the integrity of the entire cell structure of the cellular PVC board or sheet. Hi John, Here are a couple of pics. 6. I intend to approach the manufacturer for replacement, but problem is I see some that I already installed is greying. Is there something that we can perhaps trowel over the surface and then sand smooth before paint, or between paint and primer? There are multiple products from the same waterproofing chemical manufacturer,having different price ranges with varied warranted service life. PL Premium will bond most anything together. One said to use brush bond ( like in your blog – clean/fix the cracks & screed/apply brush bond/then screed over it). This project raises the level of your patio by 2-1/2 to 3-1/2 in. A co-worker sent me this photo asking if this was a fire hazard. In fact, you can place cellular PVC in water without fear of rotting or water absorption. LRV is measured based on color and its ability to absorb heat. If you plan on painting the trim, use any vinyl spackling. The core is nothing more than an impervious honeycomb. and Should I also use biscuits? I am totally confused. For the particular brand of trim board I used it looks like the edges are not as smooth/finished as the faces, even though its marketed as S4S. Dale. F you want to eliminate the material, labor and time to laminate two pieces of 3/4″ you might want to consider this new product thickness. (Refer to painting guidelines in the Versatex contractor handbook for more information on painting PVC trim.). We’ve used Weld-On 705 PVC pipe adhesive for 13 years now to fabricate our one piece corners and have never had a claim or return on even one of them. If all else fails, sand it off using a 100 grit sandpaper to start and stepping down to a 220 and then a 320 grit to remove the stain while also smoothing the sanded surface of the trimboard. I wish your had a web site cad program I could play with with the trim and exterior look!! It is lightweight, very smooth, and straight! I have mahogany tongue and groove – stairs….I used the pvc trim board for the kick plates. As John said to me years ago: “In order for cellular PVC to off gas it must contain Phthalates. Good luck. Grounding with locknuts is not acceptable. they give off carbon monoxide, nothing else. What is the tooth count of the saw blade using an electric mitre saw? This can be only found by repeatedly testing the area (by using water ponding) after the PU grout has hardened till the complete water leakage stops. I did a test with a solvent spray stain, then used a clear topcoat a water based General Finishes product recommended for outdoor use. The way you can tell a the difference between a tube of sealant that has solvent in it and one that does not is by the tube and plug. If these don’t work, I would step-up to denatured alcohol, then a mild solvent and finally a strong solvent like Acetone. I have had very good success gluing PVC to just about anything using OSI’s SF450 construction adhesive. Cement and Epoxy grouting will seal the pores inside the concrete in one area but until the root cause is solved, water always finds an other way to exit. Based upon my experience in the field your carpenter was correct in choosing the screw and plug system. 3) There are numerous sealants, adhesives and combination products that work well with cellular PVC trim and wood. This trim board would be very difficult to replace. But since water finds path of least resistance, you might have found only one of those cracks and have plugged that. I’m leaving your comment, so that others can see my response. The sealant is moving up and down as the PVC trimboards expand and contract. Hi I have a composite door about three years old, and the outside lamination is beginning to separate in three locations about two inches long each. If they don’t say it in their installation guidelines check their warranty. These products are relatively new to the market so long term performance data is not available. The frames are built in place using 5/4″ trim boards which have rotted, and have fixed single-pane glass that I plan to replace with Thermopane units. Up to 1/2″ at the worst. Use an 18 gage or 16 gage trim nail. One of the best adhesives on the market that has a long cure time while also drying to a hard acrylic finish that has superior strength to the cellular PVC is TrimWelder by Extreme Adhesives.
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