Wet Room in a Weekend with Fermacell

Wet Room in a Weekend with Fermacell

Wet rooms have significantly grown in popularity over recent years and can offer real benefits to a people of all ages and abilities. As well as their impact on the development of bathroom design, the trend is having a significant impact on the design and development of building products. Whereas traditionally, in order to keep your bathroom sealed against water leaks, a tanking system would be required, manufacturers are now developing new ways, including new dry-lining systems that can keep you – and your house nice and dry!

David Prout from Fermacell takes a look at how one new product, the PowerPanel H2O board, means that a wet room in a weekend is now a distinct possibility:

“Waterproofing areas such as wet rooms and bathrooms has always proved to be a huge challenge for many self-builders, simply because they do not have the right products to do the job correctly, first time,” he said.

“Using inferior products for dry-lining can lead to additional expense as it can result in a wide range of problems such as leaks, mould growth, loss of tiles and the staining of walls, floors and ceilings.

“The design of wet rooms varies considerably, with some rooms simply having a ‘wet zone’ where only one part of the room needs to be water tight whereas others may require the whole room to be sealed.”

As with any job of this nature, careful planning is the key. The positioning of all plumbing and electricity should be considered well in advance. However, the beauty of new dry-lining products like PowerPanel H2O is that from this point forward, you dry-line the walls as you would with any other room.

Here we show you how to use Fermacell’s PowerPanel H20 board to dry-line a wet room in just a weekend by following our simple step-by-step guide:


Step 1

PowerPanel H20 board can be cut in a similar way to Fermacell’s regular multi-purpose gypsum fibre boards, either using a standard rail-guided hand-held circular saw with a tungsten-tipped blade or cut by lightly scouring with a Stanley knife and snapping.


Step 2

Cut the board 10mm less than the room height and install tight to the ceiling line. If insulation is required, ensure there is a cavity between the insulation and one face of the board.


Step 3

Screw fix the 12.5mm boards to DIN Standard metal studs or timber studs (in this case) using Fermacell H20 screws at <250mm centres or staple at <200mm centres. No pre-drilling is needed.


Step 4

Apply Fermacell Jointstik to the edge of the board to ensure a secure bond between boards. The finished joint should be around a 1mm minimum gap between the boards.


Step 5

….and then position the next board.

Step 6

Once the Jointstik has dried after about 12 hours, remove the excess with a scraping knife.


Step 7

Fill all screw heads with PowerPanel H20 fine surface treatment. Where a tiled finish is required, this stage can be avoided as the tile adhesive will fill in the screw heads.


Step 8

If required, the PowerPanel H20 boards can be given a simple skim-type finish with PowerPanel Fine Surface Treatment, which eliminates the need for wet trades such as plastering. This is generally done when a paint finish required.


Step 9

A dry screed flooring system is available which is ready to use in less than 24 hours and provides a fully sealed wet room when used in conjunction with PowerPanel H20 wall boards.


Step 10

For a complete tanked solution the corners should be sealed using Fermacell waterproofing system in wet room applications, this is particularly relevant when creating walk in showers. Apply the system to the full length of the joint, firstly apply the Fermacell waterproofing primer to the corner and then apply the sealing tape. Once dry, overcoat with the Orange Fermacell sealer.


Step 11

The finished result!


For more information about the PowerPanel H20 board or the wide range of other high quality products provided by Fermacell, call 0870 609 0306 or visit www.fermacell.co.uk

PowerPanel H20 benefits….at a glance


  • Impervious to water.
  • Range of board sizes up to 3m.
  • Easy to fix and cut.
  • Fixed to metal or timber stud.
  • Tough and hard wearing.
  • Edges bonded with Jointstik adhesive.
  • No pre-drilling needed.
  • Ideal surface for tiling.
  • Heat resistant up to 200°c.

1 Comment

  1. one
    Comment by Stu@bathroom design: Sep 5, 2012 at 10:42 PM

    Had no idea that a product like this existed! I’ve actually been looking at some way to safely waterproof a bathroom for my mother – well actually to convert it into a proper accessible wetroom for her but the biggest problem is that the bathroom is upstairs.

    At least knowing I have some way of having it properly waterproofed now takes away some of that worry!

Comments Feed

Sorry, the comment form is closed at this time.