bathroom prob any help please

[hemingway]

just taken old bath out and looking to replace.its a double ended bath so taps in the mid.do i batton both walls the bath is going against for the bath to rest on for add strength.plus whats the best,tile then push the bath up or put the bath up against the wall then tile to the bath and third is the taps where single before and now its a mixer,22mm hot 15mm cold.will this pose a prob when running both together.cold is mains fed an hot is from the combi boiler.bescause the mains will be fed at a higher pressure will their be probs.thanks

 

[Alan.P]

Point one, I would batten as well, belts and braces

Point two, fit bath silicone between bath and wall, then tile to bath, leaving 2mm for silicone joint.

Point three, no idea, sorry.

 

[AliGage]

No issue with your water pressure either if your on a combi. Depending where you are your mains pressure may vary. Typically for domestic dwellings its 1.5 bar. Set your combi to the same using the filling loop.

 

[AliGage]

Depending on your tap you might want to consider non return values on the pipe work. But if it's WRAS Approved you shouldn't need them.

 

[jindru]

on point three i have used the 20 mm and 15mm supply before without problems.the only problem is if you have enough water pressure to ensure hot and cold are strong enough to operate together.your hot water is via a combi which is mains pressure via a flow restrictor subject to the flow rate of the boiler.im not a heating engineer but have fitted this combination many times without problems.hope this makes sense,cheers.

 

[destroyer2813]

No issue with your water pressure either if your on a combi. Depending where you are your mains pressure may vary. Typically for domestic dwellings its 1.5 bar. Set your combi to the same using the filling loop.

Setting the gauge to 1.5 will make no difference what so ever the gauge is related to the heating not the hot water performance

 

[AliGage]

On a combination? Pretty sure it relates to both.

 

[destroyer2813]

Trust me pal it dont im a cough cough plumber

 

[AliGage]

I've just looked it up and sorry i've been mis-informed. I was lead to belive it gauged the water pressure through the system. Curious though as to why if the pressure is low it reflects in the hot water pressure?

 

[hemingway]

Cheers for all the help guys.just 1 more question.do I have to prime my walls an plasterboard before tiling or can I put them straight on.i have used bonding to level some off the walls up an fill the hole's

 

[Perry]

You can't tile on bonding what adhesive and tiles are you using and what are your surfaces ?

 

[hemingway]

Why can't I tile over it.its thistle bonding coat undercoat for plastering, thought they wouldn't b a problem.l have filled holes around window on two walls.the walls are old style lime plaster.so came off abit when ripping old tiles off.other two walls I ripped out and replaced with moistersheild plasterboard from jewsons.tiles r ceramic 250 x 400.thought I could mybe prime an tile.now thats put job to a stop.

 

[hemingway]

Thats lime plaster skimmed owhen built, so did half the wall with the bonding.

 

[hemingway]

Its only a thin coat of bonding,I have got bal sbr primer an was going to use that before tiling.the bonding has totally dryed out now.had a couple off week to dry.what if I used a cement base adesive to tile on to.need some help now.

 

[hemingway]

Bonding is about 1 to 2mm thick bar the holes that been filled.

 

[Alan.P]

How big are the patches that you've patched up, what adhesive are you planning on using ?

 

[hemingway]

I haven't got the adesive yet.any thoughts in that department.their where patchs of holes all over the wall so just filled them In on both walls and skimmed over ,1 big patch on each.

 

[Alan.P]

Use a single part flexi standard setting adhesive, scrape off the backing plaster, fill with adhesive, prime the walls with an SBR primer and away you go.

 

[Perry]

Have a look at the British gypsum web site and make you mind up from there but I would always use cement based adhesive IMO always need the substrate to hold the weight of the tile and the adhesive
Dont think filling a few holes with bonding would be the end of the world but not skimming an area

 

[hemingway]

Thinking off sanding it all down smooth and skimming it over with plaster, can that be done with it all dried out.

 

[Perry]

Just skim it with finish only a 10 min job

 

[hemingway]

Can I use the thistle multi finish straight over it.do I have to use pva or can I use the bal sbr primer.never skimmed before, first time for everything.if I do a gd job il only tile have way up.if its bad then full tiled ha.

 

[Perry]

Might be worth a pm to whitebeam he the plasterer of all knowledge on here

 

[Martyn Leeds]

Yes to PVA - If you're putting the multi-finish on

 

[Colour Republic]

I've just looked it up and sorry i've been mis-informed. I was lead to belive it gauged the water pressure through the system. Curious though as to why if the pressure is low it reflects in the hot water pressure?

It won't mate. The pressure guage only relates to the CH not the DHW

Only time low CH pressure will effect the hot water is if it's so low it prevents the boiler from firing