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membrane
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A membrane is a selective barrier; it allows some things to pass through but stops others. Such things may be molecules, ions, or other small particles. Biological membranes include cell membranes (outer coverings of cells or organelles that allow passage of certain constituents); nuclear membranes, which cover a cell nucleus; and tissue membranes, such as mucosae and serosae. Synthetic membranes are made by humans for use in laboratories and industry (such as chemical plants).
This concept of a membrane has been known since the eighteenth century but was used little outside of the laboratory until the end of World War II. Drinking water supplies in Europe had been compromised by the war and membrane filters were used to test for water safety. However, due to the lack of reliability, slow operation, reduced selectivity and elevated costs, membranes were not widely exploited. The first use of membranes on a large scale was with micro-filtration and ultra-filtration technologies. Since the 1980s, these separation processes, along with electrodialysis, are employed in large plants and, today, several experienced companies serve the market.The degree of selectivity of a membrane depends on the membrane pore size. Depending on the pore size, they can be classified as microfiltration (MF), ultrafiltration (UF), nanofiltration (NF) and reverse osmosis (RO) membranes. Membranes can also be of various thickness, with homogeneous or heterogeneous structure. Membranes can be neutral or charged, and particle transport can be active or passive. The latter can be facilitated by pressure, concentration, chemical or electrical gradients of the membrane process. Membranes can be generally classified into synthetic membranes and biological membranes.
I'm currently pricing a job 60sq. mtrs. 600/440 porcelain over ufh under screed. As I've never fixed membrane and this is a substantial area I'm unsure of how long it takes and would appreciate a rough guide price for labour. Alternatively some idea of time to fix 60 sq.mtrs in a reasonably...
SandyFloor
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decoupling
decoupling membrane
fixing
membrane
usa
Hi, my first post.
I'm tiling a bathroom and I'm looking to waterproof around the bath/shower area.
When removing the old tiles, I found that water had got through to the plasterboard and render.
The silicon seal seemed to be intact.
(The wall is plasterboard on the internal wall and...
I have a floor area approx. 30m to tile. Half is on exterior ply the other half on screed. Will I need to put down a uncoupling membrane over the whole area before I tile. The tiles are ceramic .
We are about to use RIW tilesafe membrane in our bathroom.
We are not sure how would it be the best to apply it.
Our bathroom is 2.2 x 3.1m. We have water underfloor heating in
screed in the whole floor in the bathroom. The whole floor with walls
in the bathroom will be tiled with stone...
Hi,
I'm planning on tiling the floor & wall of our en-suite with 12mm Cappuccino marble, not quite decided on the size yet, but could be as large as 610 x 406 x 12mm
3 walls are Knauf Aqua Panel tile backer board, fourth wall is concrete block.
The floor is tongue and groove wooden floor...
Ronski
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adhesive
marble
membrane
tank
tanking
tile adhesive
usa
waterproofing
wetroom
which
Hello experienced craftsmen, I need a little advice. I am in the process of building a bathroom which is constructed so far as follows. The floor is normal chipboard floor which has been overlaid with 18mm wbp ply screwed at 300mm or less centers, all walls within the shower area are Wedi on...
Stevoe
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decoupling
decoupling membranemembrane
ufh
usa
which
Hi Guys, very amateur diy tiler here seeking some advice.
I'm halfway through my extension - separate builders, plumbers, sparks etc rather than one company. Now at stage of looking to start floor tiling. I was a bit daunted by the floor size (32 sq mtrs to be done with 600 x 600mm porcelain...
Neilm
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anti-crack
depth
ditra
ditra matting
floor
matting
membrane
schluter
systems
uncoupling
usa
Hiya all,
This is my first message after lurking around for a while picking up some amazingly useful info, but I've been unable to find anything on wickes waterproof membrane or 'wet room tanking fleece' as they call it.
I have already bought it and was hoping to start laying it in the...
Hi guys and girls, i need to apply a liquid dpm to a screeded floor as the floor has no dpm in it and it is damp.
the floor was covered in lino and under that is a black bitumen paint onto a screeded floor.
I am tiling it with porcelain tiles but i need to cure the damp issue first!
I have...
Hi everyone,I was just wondering,I'm going to be doing a heated bathroom floor using the open cable method,I want to use up a roll of fiberglass membrane,I'm putting the cable on Hardi-Board,then setting it in Self Leveling Compound.I want to then cover the floor with fiberglass membrane(in the...
hi,
we are tiling our bathroom and have applied two coats of 'sika prufe' liquid damp proof membrane on to ply.
the tile used are limestone and after the sealant was applied the tiles have started slipping down the wall and falling off. I now realise this was the wrong product to apply to...
Note on movement joints:
Ditra must be seperated at the existing movement joints. If Ditra is used as a waterproofing layer, the joints between the sheets must be covered with Schluter -KERDI-FLEX band.
Movement joints must be continued in the tile covering, as specified by the applicable...
Rich
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anti-crack
ditra
floor
joints
matting
membrane
schluter
systems
uncoupling
usa
Has anyone installed some of this as instructions say to use a 5mm/3/16" adhesive trowel but doesn't say whether it should be a vee or square notch. I would of thought vee notch as I think there would be a lot more adhesive with the square notch. Also 5mm seems a bit deep to me and I reckon...
Here are a few photos to show how we install this crack isolation membrane made by The Noble Company. It can also be made into a waterproof installation by overlapping and sealing the seams. This sheet membrane can be used on floors and walls. We used Noble's glue to install the sheet, although...
Hi guys...went to look at a job today, house refurb/extension..100m2 of 600x400 limestone tiles on solid floor over seven joining rooms (ground floor) and three ensuites with chipboard flooring (first floor)..Normally, I would lay 12mm plywood onto the ensuite floors (approx 3.5m2 each) then...
Has anyone used SLC to fill Ditra? I'm wondering if this would work - whether it would run into the holes fully. If it did work it would save a lot of time on bigger jobs and be more cost effective than filling with adhesive. I usually go over with a loose mix of adhesive first and allow to dry...
Can I use keraquick adhesive with the Homelux membrane onto ply and also for the ceramic tiles ? or do I need to different adhesives ?
Havent got time to get a membrane from Wetdecs as need it tomorrow morning.
fad
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keraquick
membrane
tank
tanking
usa
waterproofing
wetroom
Hi,
i need to put tiles onto the floor of a toilet room in the basement, at the moment i have carpet, underlay and some damp-proof membrane on the concrete floor.
can i place standard tile adhesive directly onto the membrane, would i need to put boarding down, or is there a sealer i can use...