Stud wall

From DIYWiki
Revision as of 21:01, 19 February 2008 by 80.227.1.100 (talk) (c4tpas)
Jump to navigation Jump to search

teen wolf penis camila action ball dragon live movie psi ops review ps2 webranking discount medical equipment knighthood inner city outings sierra club urbanlegends.com attack bear grizzly actor top 10 network marketing arabic video clips download catalog jc outlet penney store atlanta file bankruptcy alpha parf jet model turbine video gap frame press daily devotional huff tanya whats on hertfordshire optical comparator avenue video game chat oil lamp chimney girl queef lowes movie theaters in new york business phone services using substring in java the word puzzle dell laptop part gay men frankoma imovies.com cape buffalo hunts petmate blonde seamless steel siding bumblebee bat free full length porn movie video louisianas incarcerated children lexmark printer ink killers mp3 american bull kennel staffordshire terrier amateur female movie nude edgar cayce weather warnings fort wayne indiana discount vacation packages arizona microsoft anti spyware beta 1.0 dominican ladies laser mailing labels woman height short coleman camping tent salt water fish tank accessory french baby clothes free gay mpeg video new preschools york girls in thong contest sixty second film worth fighting for lyrics julian rios ardms free kyocera mobile ringtone virgin land for sale in alaska independent movie producer paleolithic art how to get rid of age spot rutebok linger regeneration weekly safety meeting topic preteens in thongs lingerie good sex tips art.asp legally blonde movie reviews 1934 gold certificate sniffing toes fabolous ball number pa power result vacation travel agent online nationwide play off tickets different type of ovarian cyst slowpitch softball bat review hurricane arlene mexican stews loca myspace.com site vida thermoelectric coolers http webmap next generation nintendo console free mature women sex website listen music place video watch cell cyrus miley number phone real britney crotch shot bike trial general grevious hard hat loletta lee video feminize boys stories john keats to autumn a team movie trailer gunbrokers lava life personals napoleon dynamite dance jim carrey movie posters ceramic animals dictionary english english furigana japanese japanese japanese kodanshas lincoln middle school pullman mens prescriptions 2005 estimated federal payment tax voucher peter north facial movie cheap international airline ticket avi mpeg video converter 1.30 serial badfinger painted horses figurines the limited clothing store myspace.com site yep booknotes atr bydgoszcz.pl analog video capture card home blow job video big turds logitech wingman 3d driver ohio state university wrestling flight arrivals webmap south carolina state treasurers office alumbra dios puerto rico video sexy women nude acrycli binde fountain pelikan pen skin animals of australia domain abbeville newspaper toyota great falls montana skin disease naples fl vacation homes bookbinding disney hotel discounts football hard hit in harley davidson parts jawbreaker movie san ramon california real estate regscrub vix bathing suit plouffe ri outrage photo mexican gang tattoo top board games of all time line navajo times 2 960 emulator game nes nintendo rom interracial xxx video alice munroe open headlight upgrade kit newspaper article on child abuse after bankruptcy acrylic art art painting work picture of world longest penis rick perry electrovoice eliminator i wine spectator award chinese junk pc recycle pivot lcd monitor url free online psychic chat fayetteville tn newspaper maya lin nassau scuba center lady mature bar names tea gardner and yugi radio horizonte acores pussy movie free download link model ukraine youngest keine lust video online sell it trader webmap coffee wholesale usa uniform accessories list movies of 2004 ohio news network wireless home security night vision camera card design post quilt sql server dba resume annie cruz free videos ass black huge movies.wmv tit fingerhut.com pratap singh rane goa heroin drug e200 hard reset spv ice lesson skating video new rnb tracks gavin degraw - chariot trentonian adaware se logica digital a small chest freezer low cost airline ticket ali g show video clips There are many ways to make partition walls, but the most popular is timber frame & plasterboard. Framed walls are known as stud walls.


Timber framed Walls

Timber framing consists of:

  1. horizontal wood top and bottom, known as the sole plate and header plate, and vertical wood attached to the wall at each end of the new wall.
  2. Wooden uprights anything from 1.5"x2.5" to 2"x4" spaced typically 16" or 24" apart
  3. Short horizontal noggings joining neighbouring uprights for increased strength and stiffness.
  4. plasterboard attached each side
  5. Mesh tape over the joints, though this can be omitted.
  6. Usually plaster skim both sides, though this is sometimes omitted and the joints and screwheads filled.


The 4 strips of wood making the outer frame are needed to secure the wall in place.

Uprights are needed to provide the wall's strength.

Noggings prevent uprights twisting after fitting. Twisting would make small tears in the finish. Twisting may occur if no noggings are used. Noggings also increase the rigidity of the wall, and give the PB some extra support.

1 line of noggings prevents significant twist. 2 lines of noggings makes the plasterboard more rigid, and makes the uprights practically twist proof. 3 lines of noggings gives very short thin walls more rigidity and strength. This is only effective where wall width is not a great deal longer than height.

Mesh tape over the joints before filling prevents any loose pieces of joint filler falling out. It is sometimes omitted.

Plaster skim gives the cut & screwed PB a nice smooth surface.


Wood choice:

Wood size

  • 1.5"x2.5" will give minimal sound absorption and is not recommended. However it does work and can be used where space is critical. The closer such uprights are spaced the better for sound insulation, but even 2' spacing is functional. Should only be used for rooms where sound insulation is unimportant. Such thinly framed walls are not suitable for plaster skimming. If you can spare another half inch, choose staggered isolated frames to gain some sound insulation, or larger timber for better rigidity.
  • 2"x2" Many have been tempted to cut corners with 2x2 framing. Once skimmed, the wood moves enough to pop little pieces of plaster off over the screws. 2x2 is not recommended.
  • 2"x3" sawn makes a wall suitable for skimming. Do not confuse this with 2x3 CLS or PSE, which tend to be closer to 1.5" x 2.5".


Quality of timber

The quality of timber used for framing may be low. Timber frame walls are an opportunity to use up some of the junk.

Wood may be twisted to some degree. Once the PB is on a few mm undulation is not normally noticeable.

Badly twisted wood may be used if trimmed. To ensure a nice flat wall, the high edges of warped wood can be sawn or planed down. Generally this is a waste of time, but if its that or drive out for more wood, planing is probably quicker.

Warped wood is fine, just fit it so the warp is sideways rather than outwards when possible.

Small splits are unimportant, as is the appearance of the wood.

Wood may be rough sawn, planed, or scrap wood with paint on. None of it will be seen once the wall is done.

Wood may be damaged or have holes. Just avoid holes of such size as to significantly weaken the timber.

Badly twisted, split or damaged wood may be cut to short lengths for nogging use.

Broken wood can be screwed or glued together and used if necessary.

In a pinch one can even use thinner bits of wood glued & screwed, glued & taped, or screwed together as an upright. (Tape is quicker than clamps.)

Thinner scrap wood may be used for noggings if there is not enough full size wood in stock. Full size noggings will perform better though.

Wood slightly too short can be padded at the top or bottom with an offcut.

2 pieces of wood much too short may be screwed together to make one upright. Just put 2 screws through the overlapping section to create the length desired.

The 4 pieces of wood around the edges of the wall may be thinner than the rest. It wont flex as its screwed to walls, ceiling, etc.

Wood with rot or woodworm is not suitable.


Improving the Stud Wall

There are some ways to improve the performance of these walls.

Stronger Plasterboard

plasterboard walls are prone to being holed, and resonate when tapped, making them sound thin and hollow, which they are. Use 12mm PB not 9.5mm for better strength. The extra cost is tiny, and 12mm PB can be recommended in almost all cases. The only real plus of 9.5mm PB is its easier to hold up for ceiling use.

Isolated Framing

By supporting each PB side on its own isolated framework, a main sound transmission path is broken. This can be achieved by providing twice as many framework studs and staggering them by at least half an inch.

Use of noggings is no longer possible. Uprights can be held true by using short pieces of wood at 45 degrees at the top and bottom of each upright.

Sound Absorbing Fill

Filling the cavity with rockwool deadens sound and gives longer fire resistance.

Fireproof Plasterboard

Pink fireproof plasterboard contains glass fibre and gives longer fire resistance.

2 Layers of PB

2 layers of plasterboard give a much more solid feeling wall with less resonance, less sound transmission and longer fire resistance.

Ply skin

Half inch plywood skins (instead of plasterboard) make these walls fairly much nutter proof. Ply may be lined with lining paper to give a smooth paintable surface, after filling joints and screw heads. Oh yes it can

Camden Walls

When good soundproofing is required, google for Camden walls as developed by the BBC for studio work.


Nails or Screws

Always use plasterboard screws and not nails. PB nails give lousy performance. Even after many nails PB can very easily come loose, and is prone to popping plaster over nailheads and cracking up at joints. Plasterboard nails are one economy not recommended.

Always use bugle head PB screws and not ordinary countersunk screws. Standard screws cause the plaster to ruck up, ruining the finish. They also rust when plastered. If for some reason you need to use a standard screw or two, predrill the plaster with clearance holes for them to minimise board breakup, and prime the screw head after fitting to avoid rust.

PB screws will go directly into 0.5mm steel framing.


Painting

New plaster is absorbent. If you paint on it with standard strength emulsion the paint layer will be sucked dry and lose much of its water based adhesive.

There are 2 ways to resolve this.

  1. Make the first paint coat diluted 50/50 with water.
  1. Brush on a coat of water, which can be done very rapidly due to no need for care. Give it a few minutes then apply normal strength paint.

The 2nd option has advantages:

  • no mixing, no container to clean up
  • quicker
  • first coat is full strength not half
  • Better adhesive retention in the paint layer


Other wall types

Metal framing

As timber frame but thin steel frame is used. The framing is bought in kit form. Ordinary plasterboard screws will go straight into the metal.

Hollow concrete blocks

Once a popular form of medium weight internal wall construction.

Aerated concrete blocks (aka Breeze blocks)

A popular medium weight alternative to framed walls. Better performance all round, but more work and cost to build.

Block walls can be finished with a wet plaster skim, dot & dabbed plasterboard, or battens & plasterboard. plasterboard may be plaster skimmed or just filled.


Strawboard

A low cost thin wall with good sound insulation but poor strength. Quite possible to fall through such walls. Consists of thin uprights, straw infill and PB.

Poured concrete & Dense Concrete Block

Two heavyweight types of wall. Generally unsuitable for supporting on ceiling/floor woodwork due to high weight. Can be used on concrete ground floors, but aerated blocks are normally enough.


Thinnest Possible Wall

The question sometimes comes up, "what is the thinnest wall I can build?" There is no fixed answer in the sense that it is a continuum, the thinner the wall the weaker it is, the more sound it transmits, and the less durable it is.

If very poor performance were acceptable, a single layer of half inch ply would make a wall, screwed at top and bottom with many screws from each side at a 45 degree angle into floor and ceiling. Or a sheet of 6mm fibre cement sheet could be supported on brackets top and bottom.

The question then is one of trying to achieve passable performance with minimum thickness. There are a few main approaches to this, though doubtless there are others:

  1. replace PB with plywood or fibre cement sheet. Screwing this every 6" to the wood frame helps stiffen the structure up.
  2. Use many noggings, so that the horizontal woodwork substantially stiffens the structure as well as the vertical. Note this method only adds significant strength with very short runs of wall.
  3. Make a wall from sapele veneered doors. Cut to required height, put in place and screw into the sides through the corners and into floor and ceiling. Fix the blind sides with glue. These don't make great walls, but are a quick easy method, and are very thin.
  4. Use wide uprights. 2"x4" the wrong way round will give twice the stiffness of 2x2. Care needs to be taken to prevent misalignment and future twisting of the uprights, so noggings are important.
  5. Use hardwood uprights
  6. Use uprights more closely spaced, eg 1' or less apart.
  7. Build a 2" or 2.5" solid block wall, or poured concrete wall.
  8. Build a steel reinforced fibre concrete wall less than 2" thick, anchoring it by fitting many corrosion proof screw heads round all 4 sides first.

See Also