Monday, September 28, 2015

Installing Vinyl Tiles Over Existing Vinyl Tile Hallway - Luan Thickness and Sizing



Installing Vinyl Tiles Over an Existing vinyl Tile Hallway


When installing vinyl tiles over an existing vinyl tile hallway. It is better to attach luan plywood over the sub floor with ring shank nails. Depending on the existing floor if has 1/4" Masonite+1/8" vinyl tile on top of that I will add 1/4" laun plywood + 1/8" vinyl tiles. The best option is to use ring shank nails which are made exclusively for this purpose. Of course, as I mentioned, it depends on the existing floor and subfloors in your project. 


Some people that prefer to use vinyl have used 7/8” staples. When you install thin plywood it is best to have a staple gun made just for installing ¼” and also luan which has been pre-coated for 7/8”


With all underlayments, the fastener should penetrate the underfloor by ¾” (1.9cm), but not protrude through the underfloor by more than 1/8” which is about 3.2mm. If you have an underlayment which is replacing or being placed over an old floor covering like vinyl then the thickness of the existing flooring should be taken into consideration as well when you decide on which nail and the length of the staples used.

Scrubbing the Floor before Installing Luan/Vinyl



Scrub the floor to remove any debris from the floor before applying a very fine layer of motor or cement to the vinyl flooring this will serve as the base to apply the new top floor. Make sure to use a proper backing cement backing applied with screws works best for these types of renovation projects. 


The reason we clean the floor first before applying new top floor is to ensure there is a proper seal between the vinyl and top floor. Of course if you are using adhesive or cement that will aid in the contact between the floor and vinyl/ceramic and the luan plywood base. 


Instructions for Applying Plywood to the Subfloor 


  1. Set the plywood to sit for several hours in the room in which will be installed
  2. Make sure the subfloor is not wet and structuraly sound
  3. Install with 1″ deck scews into sheet of plywood, smooth side facing upward
  4. Make sure the underlayment sems are not aligned with the subfloor seams
  5. Lay the following plywood sheet – start along the longest wall and leave 1/4″ expansion gaps in between sheets and between the sheets the walls
  6. Secure the plywood sheet every 6″ – make sure to drive the deck screw heads bellow the surface of the plywood sheet
  7. Cut the plywood shets as required to follow the surface of the floor
  8. Apply floor patching over the screw heads and the plywood seams
  9. After the patching compound has dried, sand the compound
  10. Vaccum and wipe with a damp cloth all the resulting dust




    1/2 Inch Luan 4ft by 4ft


    Does Luan Plywood come in 1 inch (1 ") format? That's probably a very good question, but to be honest, Luan is usually found in formats or types of sizes ranging from 1/4 inches to 1/8 inches. Laun is a very thin material plywood, and is best used for interior purposes, with the primary purpose being for the underlayment of vinyl flooing. 1" Luan Plywood Boards would be very thick for the type of work they are designed to complete, however if you are in a crunch and need to correct the thickness for any home project, there is always the option to gluing pieces of luan boarding together until the correct depth has been reached.

    Installing Luan Wood Over Subflooring

    With thelong edges of the luan sheets should be offset from the subfloor by at least 4", and more is okay. The short edges of luan board (plywood) should 1/4 of the way between the joists, for example 4" from the joist if they're 16" O.C. and 6" if they're 24" O.C. You are correct about the spacing of the sheets. Also make sure to screw the two layers together, but avoid hitting the joists. The easiest way to do this is to use screws that are the same length as the thickness of both layers, 1 1/4" in your case.


    Locating Screws for Luan Wood Projects:

    Sometimes it's not possible to find screws that exact length, but you can find 1 1/2", and that's okay since you'll have very minimal penetration of the joists with that size screw. You want screws every 4-6" around the perimeter of the sheet, and every 6-8" in the field.

    Use deck screws, not drywall screws. You want them seated flush, but not below the surface. Depending on how many square feet you have to do, you may want to try to get your hands on a deck screw gun.

    If you go through 50-60 screws per sheet and have 30-40 sheets to do, it can be very time-consuming and back-breaking. This will give you an exceptionally strong subfloor that should hold up to just about anything.



    Using Wood Glue on Luan Plywood 


    Drywall Screws used to  attach Luan Plywood  should be used with wood glue to improve effectiveness. What you should do is also use some wood glue on the joints to ensure a solid seal. When using wood glue, and use it properly screws in luan plywood will have a stronger grip than just using the wood screws on their own. If you are doing a project near a water hazard, or a project that will be getting wet a lot, then you will want to use a wood glue with a tight bond 3 rating. If it will not be in contact with a lot of water any wood glue will do. 





    3 mm Luan Plywood Installation


    3 mm laun plywood is the top material for underlayment among home renovators and contractors. It's quality is unsurpassed, and it is extremly durable and long-lasting.

    Amoung Manufactuers of Vinyl Flooring, Hardwood Flooring, Tile Flooring, and Laminate Flooring, the choice is clear, and Luan is the top pick. Of course before you proceed with any home improvement product, you should check with your flooring manufacturer before you proceed with installation to confirm.

    1 inch plywood for Luan?

    Does Luan Plywood come in 1 inch (1 ")  format? That's probably a very good question, but to be honest, Luan is usually found in formats or types of sizes ranging from 1/4 inches to 1/8 inches. Laun is a very thin material plywood, and is best used for interior purposes, with the primary purpose being for the underlayment of vinyl flooing. 1" Luan Plywood Boards would be very thick for the type of work they are designed to complete, however if you are in a crunch and need to correct the thickness for any home project, there is always the option to gluing pieces of luan boarding together until the correct depth has been reached. 



    Installing Luan Wood Over Subflooring

    With thelong edges of the luan sheets should be offset from the subfloor by at least 4", and more is okay. The short edges of luan board (plywood) should 1/4 of the way between the joists, for example 4" from the joist if they're 16" O.C. and 6" if they're 24" O.C. You are correct about the spacing of the sheets. Also make sure to screw the two layers together, but avoid hitting the joists. The easiest way to do this is to use screws that are the same length as the thickness of both layers, 1 1/4" in your case. 


    Locating Screws for Luan Wood Projects:

    Sometimes it's not possible to find screws that exact length, but you can find 1 1/2", and that's okay since you'll have very minimal penetration of the joists with that size screw. You want screws every 4-6" around the perimeter of the sheet, and every 6-8" in the field. 

    Use deck screws, not drywall screws. You want them seated flush, but not below the surface. Depending on how many square feet you have to do, you may want to try to get your hands on a deck screw gun. 

    If you go through 50-60 screws per sheet and have 30-40 sheets to do, it can be very time-consuming and back-breaking. This will give you an exceptionally strong subfloor that should hold up to just about anything. 


    Using 18mm plywood Underlayment

    Installing 18mm Luan Plywood Underlayment for your vinyl or laminate flooring project.


    Install Luan plywood with staples to the subfloor plywood using 18mm or longer staples. You should staple every 18mm  around the edges and every 20mm inches at the centre of the plywood boarding. At this point you have the choice to make as to whether you wish to use glue to adfix the luan to the plywood subflooring.



    Once this has been completed, you can sand all the seams so that they become level, and then any gaps or spaces, you can use high grade filler (wood) or otherwise, as recommended by the maker to finish the surface before installing top floor.

    Make one more visiual scan to ensure that there are no staples sticking above the seams of the luan underlayment, as this will disrupt the surface of vinyl or laminate top flooring when it is installed or during use. Any staples, rising above this level, should be tapped on with a hammer until flush.

    What is Bendy Plywood: Is Luan Bendy? 


    Bendable Plywood (Luan) Applications Bending Luan plywood (Bendy Plywood) can be used in different interior applications and for many types of woodworking projects. Luan Plywoods and Veneers are used for building cabinets and furniture with rounded corners as it can conform to a tight circular shape without splitting or cracking. Bending plywood is very simple and convenient to use as it does not require any special knowledge, experience, or equipment. This plywood can easily be bent to shape without the complex process of steaming the wood in order to bend or keep it into a curved shape. 


    There are two types of Luan:

    Luan Type 1 with an exterior glue, is the more resistant to delamination, and should be installed under very durable flooring

    Luan Type 2 with a water-resistant glue.


    The type is normally indicated on the panal edge. Usually on the 4 foot edge, on the 4x8 sheet. There are three possible standards of Luan, which are

    BB - the highest grade and should be used whenever possible.


    OVL (Overlay)
    APA’s installation guidelines for 1/4-inch plywood should be followed when installing lauan plywood, but installers BEWARE: Lauan is made under a wall-panel specification of the International Hardwood Products Association (IHPA). No manufacturing specifications support its use or gauge its performance as an underlayment




    Thursday, May 28, 2015

    Gyp-Crete 2000®/3.2K Data Sheet - MAXXON

    Product Description: Gyp-Crete 2000®/3.2K by Maxxon is a gypsum floor underlayment is engineered to deliver compressive strengths up to 3,200 psi (22.1 MPa), also delivering enhanced resistance to surface abrasions and even faster drying time.


    This is a newer technology so it should work better than standard materials.

     It's ideal for use over wood or concrete subfloors in single family, light commercial, and multifamily construction, as well as renovation projects. Its crack-resistant surface provides a perfect base for practically any floor covering. Now always a "green" building material, Gyp-Crete 2000/3.2K is an ideal gypsum floor underlayment for sustainable building projects.

    1 – CHECK FOR DRYNESS FIRST


    Ensure for dryness are accurate relative humidity probe systems that allow for easy and continuous monitoring of the drying process. Watch the guideslines the respective floor goods manufacturer’s recommendations for relative humidity requirements.

    For example, most flooring manufacturers typically require RH not exceeding 75-80%. Moisture meters can be used to determine approximate Moisture Content (MC) and determine where to place RH tests.

    When a moisture meter is required, use a pin invasive type such as a Delmhorst model G-79 or Delmhorst BD2100. (On the model BD2100, make sure you are on Scale 3 “gypsum,” after this use the digital display only, do not use the color coded LED indicators). In pours over 11⁄2" thick use insulated pins  that can be drilled holes at various points and thicknesses. Ensure that it works well  with the floor goods manufacturer’s recommendations for moisture content — typically 5% or less on the above mete

    Apply OVERSPRAY

     Make certain the surface to receive the Overspray is free of mud, oil, grease and other contaminants. For maximum results, the Overspray is applied about 1–2 hours before applying the adhesive application. Latex adhesives will not achieve maximum bond until moisture has dissipated. (Note: Level-Right® Maxx does not need to be primed.)


    TIPS FOR USING WITH WOOD / LAMINATE FLOORING TYPES 

    Prepare the underlayment according to Steps 1 and 2 on the cover of this brochure.

    USING  GLUE-DOWN INSTALLATIONS . 

    Other adhesives may also be compatible. Before applying any adhesive, make sure the luan underlayment is clean and has passed a dryness test. Apply primers and adhesives according to the manufacturer’s instructions.

    QUESTIONS ABOUT UNDERLAYMENT AND INSTALLATION 



    If you have any questions about the compatibility of primers and adhesives perform a small test patch installation. Let the test area set for 72 hours before removing the flooring


    Instructions for using with Radiant Floor Heating Systems Luan Plywood

    Adhesive based laminated hardwood systems are usually  the most stable flooring systems for use with radiant heat. The cross-plies of the flooring and underlayment make the surface very stable and resistant to excessive expansion and contraction. Many wood flooring manufacturers produce pre-finished, square-edge laminated hardwood floors that are indistinguishable from nail-down systems. Since laminated systems are generally thinner than nail-down systems, the radiant system performance is improved due to lower resistance from the floor covering.


    When using with Solid Wood Flooring 


     Attach solid wood flooring according to the instructions 

     Make sure that you put the sleepers are installed directly on the luan plywoodsubfloor and tubing is installed between the sleepers. The spaces are then filled with an approved luan Underlayment to provide a thermal mass. Once the luan underlayment has dried, a vapor barrier is laid down and the flooring boards are nailed directly into the nailing sleepers that were installed on the luan plywood subfloor. The advantage of this system is that the flooring creates minimal insulation above the heating system. The disadvantage is that the flooring can only be nailed to a sleeper which may not provide enough fastening.




    On Grade Concrete Flooring and Luan Plywood Underlayment

    On-Grade Concrete Floors and Luan Plywood Underlayment

     a. The slab must be of good quality, standard density concrete with low water/cement ratios consistent with placing and finishing requirements, having a maximum slump of 4″, a minimum compressive strength of 3500 psi, and following the recommendations of ACI Standard 302.1R for class 2 or class 4 floors and the Portland Cement Association’s recommendations for slabs on ground.


    b. The concrete slab must be dry, clean, smooth, structurally sound and free of foreign materials that might prevent adhesive bond as described in ASTM F-710, “Standard Practice for Preparing Concrete Floors to Receive Resilient Flooring”. The cleaner the slab the better, the adhesion properties.


     c. The concrete slab must be protected from ground moisture with an effective and intact vapor retarder that conforms to the requirements of ASTM E-1745, “Standard Specification for Water Vapor Retarders Used in Contact with Soil or Granular Fill Under Concrete Slabs.”


    d. The concrete slab must be placed directly on the vapor retarder.


    e. The concrete must be wet cured with a moisture-retaining curing cover. Do not use spray-on curing compounds because these reduce the drying rate of concrete and can interfere with adhesive bond.


    f. Before installation of the finished flooring, moisture, alkali and bond testing must be conducted.


     1) Moisture testing must be performed in accordance with ASTM F-2170 “Standard Test Method for Determining Relative Humidity in Concrete Floor Slabs Using in situ Probes” (preferred method) or in accordance with ASTM F-1869, “Standard Test Method for Measuring Moisture Vapor Emission Rate of Concrete Subfloor Using Anhydrous Calcium Chloride.” See the section on Moisture Testing for more details.

    2) The surface of the concrete must have a pH of 9 or less. 3) Bond testing must be run to determine compatibility of the adhesives to the concrete slab.

    Top Pick for Subfloors- Luan Wood


      The top material for underlayment among Home Renovators and Contractors is the 1/4 inch Luan plywood. It's quality is unsurpassed, and it is extremely durable and long-lasting. It is also among the Manufacturer's of Vinyl Flooring, Hardwood Flooring, Tile Flooring and Laminate Flooring. The choice is clear, and Luan has to be the top pick. Of course, before you proceed with any Home improvement product, you should check with your flooring Manufacturer before you proceed with any installation that needs to be confirmed.


      There are types of Luan:



    Luan Type 1:  wood with an exterior glue is the more resistant to delamination, and should be installed under very durable flooring

    Luan Type 2: wood with a water-resistant glue.




      The Type is normally indicated on the panel edge. Usually on the 4 foot edge, on the 4 x 8 sheet. There are possible standards of Luan, which are:


    BB -   Best Graded 

    CC -   Medium Graded

    OVL-  (Overlay)



    APA’s installation guidelines and WARNING!!! : 
     
     When using 1/4 inch plywood, Instructions should be followed when installing Luan plywood, but Installers BEWARE: Luan is made under a wall-panel specification of the International Hardwood Products Association (IHPA). No manufacturing specifications support its use or gauge its performance as an underlayment.

    Working With Below Grade Concrete Floors and Luan Plywood Underlayment


    Below-Grade Concrete Floors and Luan Plywood Underlayment 


     The floor classification must be per the current edition of the American Concrete Institute’s “Guide for Floor and Slab Construction”, ACI 302.1R:

    1) For residential and light commercial: Class 2 (except minimum compressive strength must be 3500 psi)  - This depends on the type of project you are working on.

    2) For commercial and institutional:

    Class 4

    b. Shall have a minimum compressive strength of 3500 psi.( varies)

    c. Before installing Luan Plywood Underlayment over concrete slab, it must be dry, clean, smooth, structurally sound and free of foreign materials that might prevent adhesive bond

    d. In addition to this the concrete slab must be sealed from ground moisture with an effective and strong vapor blocker/stopper.


    The concrete slab must be placed directly on the vapor retarder.

    f. The concrete must be wet cured with a moisture-retaining curing cover. Do not use spray-on curing compounds because these reduce the drying rate of concrete and can interfere with adhesive bond.Chapter IV — Subfloors and Underlayments 55 g. Before installation of the finished flooring, moisture, alkali and bond testing must be conducted.

     1) Moisture testing must be performed in accordance with ASTM F-2170 “Standard Test Method for Determining Relative Humidity in Concrete Floor Slabs Using in situ Probes” (preferred method) or in accordance with ASTM F-1869, “Standard Test Method for Measuring Moisture Vapor Emission Rate of Concrete Subfloor Using Anhydrous Calcium Chloride.” See the section on Moisture Testing for more details.


     2) The surface of the concrete must have a pH of 9 or less when tested according to the method described in ASTM F-710. 3) Bond testing must be performed to determine compatibility of the adhesives to the concrete slab.

    Working With Concrete Subfloors and Luan Underlayment

    Working With Concrete Subfloor and Luan Underlayment

    New and existing concrete subfloors will have to reach or exceed the minimum requirements of the latest
    edition of ASTM F 710

    Introduction to the new requirements can be found here along with all relevant information.

    “Standard Practice for Preparing Concrete Floors to
    Receive Resilient Flooring” available from the American Society for Testing
    and Materials, 100 Barr Harbor Drive, West Conshohocken, PA 19428;
    610-832-9500; http://www.astm.org.



    Depending of the type of concrete used or which cement material used
    as a base for resilient flooring, in the event of underlayment failure, the
    responsibility for warranties and/or performance guarantees rests with
    the concrete or cement-like material manufacturer and not with the
    manufacturer of resilient flooring.


    1. Concrete Floors and Moisture

    As usual concrete subfloors can be a source of moisture-related flooring
    failures, which sometimes include concrete subfloors themselves. By its very nature,
    concrete starts as a water-saturated mass which must cure and then dry
    sufficiently to allow the installation of flooring.

    Above-grade floors normally have only the mix water to contend with although rain, spills and
    water leaks can add more water. Roughly one-half of the mix water is
    consumed by hydration of the cement during the curing period, with the
    rest being slowly reduced by evaporation.

    Once dry enough for installation, there is little chance of future moisture related problems on
    above-grade concrete slabs when used with luan plywood flooring. Concrete floors-on-ground, or below ground, have not only the mix water to consume and dissipate, they also have a
    potentially inexhaustible source of moisture from the ground as well as transfer to the underlayment regardless of type.

    When covered with resilient flooring as well as luan underlayment, a concrete subflooring that has been constructed on top of thesubgrade soil will become approximately as moist as the soil on which
    it was installed.

    Uses Of Plywood (Luan Wood) 


       What are the uses of Plywood in your home? This is a casual question that most people ask. So, here are some answers for what you can do with these pre-fabricated wooden panels. Uses of Plywood are primarily found as a building and construction material, and depending on its finish it can be used as an external piece for your home and hardware projects. On this blog in which I mainly discuss Luan, as a use of plywood, the primary use for plywood is as an underlayment for vinyl, laminate and ceramic flooring. This use is basically to ensure that the top floor appears even and has a buffer between it and the subfloor.

    Other Uses of Plywood include in furniture and cabinet making, for kitchens and other household items. Plywood is a very useful material and is constructed as such to be durable and resistant to damage.

    How is Plywood Made? 
    CDX Plywood

      Plywood is made through the use of wood panel made from thin sheets of Luan wood veneer. It is one of the most widely used wood products.

     It is very useful as well as, inexpensive, workable, and re-usable, and usually can be manufactured locally. Plywood is used instead of plain wood because of plywood's resistance to cracking, shrinkage, splitting, and twisting/warping, and because of its generally high strength.

     Layers of Wood, which are called Vaneers,are glued together, with adjacent plies having their wood grain at right angles to each other, to form a composite material. This alternation of the grain is called cross-graining and has several important benefits: Plywood Vaneers reduce the tendency of wood to split when nailed at the edges, this is a benefit for many do it yourself jobs, especially when you consider that most "do-it-yourself'ers" are novices in jobs for the first time.

    Another advantage of Plywood Vaneers is that they reduce expansion and shrinkage, providing improved dimensional stability; and it makes the strength of the panel consistent across both directions. There is usually an odd number of plies, so that the sheet is balanced—this reduces warping. Because plywood is bonded with grains running against one another and with an odd number of composite parts, it is very hard to bend it perpendicular to the grain direction. Plywood is a manufactured wood panel made from thin sheets of Luan wood veneer. It is one of the most widely used wood products.


    Using Marine Plywood in Kitchens and Baths
    Applications for Marine Grade Plywood
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    Is Dynea Plywood Considered Marine Grade Plywood?
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    How to Install Marine Grade Plywood
    Installing Marine Grade Plywood for Boat Building
    Boat Building Plans Available Online 
    Luan and Marine Grade Plywood?
    What is Marine Grade Plywood

    Tuesday, March 17, 2015

    Luan Plywood Ceiling Installation


    Luan Plywood Ceiling Installation 


    Attaching will be with construction adhesive and nails. Depending on type luan  plywood you can go over studs directly or you may need to go over drywall if its thin like paneling. I saw this done once where the fasteners were incorporated into the design.

    When you use black lag bolts with allen wrench sockets. Each panels had finished edges, painted black. Some panels were about 2'x3' if I recall correctly. and had about a 1.5" space between each.  They were shimmed down from a main ceiling by about 1.5".  main ceiling, or sub ceiling if you will, was also painted black.

    Consider the panels were a pre-finished mahogany wood. It looked really neat. I considered doing this in my basement. There are also beadboard options, in sheets or boards, that look nice. Bottom line - This can be a real architectural feature or it can be a red flag when you go to sell, depending on how its done. I would personally experiment with different styles and see what suits you best.

    If you just want to take up luan plywood to cover some problem and avoid mudding thing you may be going down a wrong path. If you are doing it for design reasons then go for it and make it nice.




    Using Luan Plywood as a Ceiling - To Strengthen Beams

    Step 1 - Find the Ceiling Joists

    Use the stud finder to locate all ceiling joists and mark the location with a pencil. Mark the joist by snapping a chalk line across the ceiling. The luan plywood will be installed perpendicular to the joists.

    Step 2 -  Luan Plywood Installation

    Glue the precut plywood in place using panel adhesive. Apply the adhesive to the luan plywood in a thin serpentine patterned line. Place luan  plywood on the ceiling pushing it against the edge. Use the pneumatic nail gun to put the luan plywood in place. Place the nails where you marked the ceiling joist.
    Continue this process for each luan  plywood panel, using a rubber mallet to butt the panels as close together as possible.

    Step 3 - Wood Molding

    Place construction adhesive on the back of the precut wood molding. Align the molding with the edge of the ceiling. Use finishing nails to fasten it in place.

    Step 4 - Sanding and Prep

    Cover all nail holes with wood putty using a small putty knife. When the putty has completely dried, use sandpaper to smooth any imperfections in the wood and the putty. Use a soft cloth to remove any dust from sanding.


    Strenghten Beams Using Luan Plywood



    How to Strengthen Beams Using Luan Plywood 

    By adding a luan plywood on top of  both sides of the beam, it can provide what home renovators refer to as shear strength.

     This type of luan plywood fortification is also commonly used on the exterior of frame buildings to add accumulative strength to vertical support studs spanning across the structure.


    Measure the width of the beam at the point where two parts of the beam intersect or are joined together at any point.

    2 Cut four pieces of luan plywood the same width as the beam on a table saw. Cut them parallel to the grain of the luan plywood.


    3 Mix the powdered resin glue with water according to manufacturer's directions. Liberally brush one side of two pieces of luan  plywood with the glue using a paintbrush. Place one strip on each side of the beam, centered over any intersection or joint.

    4 Shoot staples through the luan plywood pieces 2 inches apart randomly down the length of the strips with a staple gun to secure them the sides of the beams.

    5 Paint two more pieces with glue. Place them on top of the other two pieces. Shoot staples through them just as you did the first two.


    Wait 24 hours for the glue to dry before handling the beams.