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How to Install a Bespoke Glass Shower Door and Panels for Apex Loft or Attic Spaces

How to Install a Bespoke Glass Shower Door and Panels for Apex Loft or Attic Spaces

This is a methodology only, however the process is relative to all glass shower doors and glass panels being installed in an 'apex' attic or loft space . We will present the steps required to install a glass shower door and shaped glass panels, using wet glaze U Channel to secure the glass on the floor, wall and sloped ceilings. 


It is important to confirm where the glass is going to be positioned and secured, and to confirm what spacing is required for all the glass and components to fit together. We suggest using tape to clearly mark out where the glass is going to be installed. Use a low tack masking tape to mark the relevant positions on the floor and wall, a laser can then be used to confirm where the centre of the glass will sit. The U Channel we sell has a small groove in it’s centre, so the laser can be aligned for checking and accuracy. If preferred mark out the centre of the glass by eye. Equally you may prefer to mark out the glass positioning based on the outer or inner face of the glass that is being installed. 

An open space intended for a custom apex shower enclosure
Use masking tape or similar and packers to confirm the glass heights

In this installation we are allowing the following tolerance reductions; 7mm for the wall, floor and ceiling U Channel. 7mm (14mm total) for the H seals to be positioned on the closing and hinge side of the glass door,. These dimensions are physically marked out on the masking tape, and double checked. Also where relevant packers or spacers are positioned to ensure the floor and walls are made as level as possible. These adjustments (if required) then translate to the packers/spacers that will be placed into the U Channel before inserting the glass. Once confirmed the side panels are positioned on a dry run, so that adjustments can be made, before any U Channel is cut.

Once the positioning and levelling is confirmed for the side panels, it’s time to cut the U Channel down to size. We are using a butt joint, where the vertical wall U Channel will sit atop the floor U Channel. Once the U Channel has been cut down to the required size, drill the spine of the U Channel, then flip it over and use a larger drill bit to again drill and form a counter sunk hole for your stainless screws.

Pilot hole in U Channel for shower glass

 Counter sunk hole in Chrome U Channel for bespoke shower glass

 First mark the hole placement for the floor U Channel first, once happy, drill, wipe away the excess, remove the tape, add a small amount of silicone to the hole, insert the rawl plug, position the U Channel and then screw in place with your stainless screw of choice. Be careful to ensure the screw head is not standing proud, as this could compromise the glass itself.

Silicone used to cover the screw head in U Channel

U Channel in position on the floor, ready for the shower glass

Repeat the process for the wall U Channel, marking the positioning, drill, wipe away any excess, insert the rawl plug, position the U Channel then screw to secure in place. Double check the alignment of the two U Channels at the join is correct. Once happy it's now time to mark the centre of the ceiling U Channel. Repeat the process for both sides of the enclosure.

Marking the ceiling U Channel

Now it’s time to check the angled glass panels are going to fit into position. Depending on how level the floor and walls are, you may need to further level the glass accordingly. Additional packers or spacers can be positioned in the U Channel. It's now time to measure and cut your ceiling U Channel down to size, and then fix to the ceiling with rawl plugs and stainless screws, when the three U Channels are aligned, the glass can be inserted for a final check.

U Channel positioned on the angled ceiling

Once everything is decided upon, silicone is applied to the U Channel, ensuring the glass will be held in place.

Apply silicone to the inside of the U Channel

U Channel for attic shower in position with silicone

Once the glass is in position, wipe away any excess silicone, repeat the process for both sides. 

Panel for attic shower enclosure

Side panel in position for attic shower enclosure

Now it’s time to silicone the actual glass screen in position. We advise running a bead of silicone down either side of the glass where it meets the U Channel, and where the U Channel meets the wall and floor. Wipe excess silicone away and leave for approx. 24 hours. 

Attic apex shower panels in position


View of two apex shower panels in situ, ready for the door


It's now time to fit the glass shower door. For the drip seal to work, we advise packing the door up approx 13mm from the base of the tray or floor. Place packers on the floor. Attach the hinges to the glass shower panel, once ready lift the shower door into position, and connect the hinge to the door. At this point adjustments can be made to the height and levelling of the door relative to the glass panels. One crucial point is to ensure the tops of the panels are aligned.

Glass to glass shower hinge

Once the positioning is confirmed, the relevant seals are cut to size and placed on the glass door and panel as required. It is important to get a tight fit with the seals, as they ensure a water resistant perimeter for the door. In this enclosure, H seals were used on the lead and hinge side of the door and a drip seal on the underside of the door. Attach the door handle (or door knob) to complete the door.

Chrome door handle for shower

Your bespoke shower glass apex attic enclosure is now ready for use.

Apex shower enclosure