screed

  1. P

    Fill in radiator tracks

    Hello, I have taken out radiators in several of our ground floor rooms (will be replaced with an overlay underfloor heating system). There are several lengths of trenches in the screed where the radiator pipes used to run. They are lined with a metal track. What do I need to do to make good on...
  2. T

    What sand for blinding on a concrete slab?

    Evening all, I'm installing insulation on my concrete slab ready for UFH and a 50mm liquid screed. I think I'll need to install a very thin sand blinding to flatten out the slab a bit, however I can't find anywhere what sand to use above concrete. I ask this because there is a DPM below the...
  3. J

    Kitchen Floor Mess

    I am somewhat out of my depth with a house renovation and would massively appreciate some advice regarding the kitchen floor... There has been subsidence at some point in the house and the concrete kitchen floor was uneven to the tune of around 50mm from high end to low end. I ripped off the...
  4. J

    latex flooring with warm water UFH

    Hi, I've been a plumber (not heating engineer) for 9 years now and finally bought my first home. As my first project, I decided to install a warm water UFH system. I've decided on Mapei Latexplan Trade for the screed which will be aprox 20mm thick. The data sheet states max 11mm per coat...
  5. U

    Question about ceramic tiles straight on to anhydrite screed without priming?

    Hi all, I'm currently going through an extension build. It's 56 sqm to be used as a kitchen / utility / dining area. We had poured screed put down on the 4th August. It had something added to it to promote quick drying (could be walked on in 48 hours). It has wet UFH underneath it. The...
  6. T

    Screeding over cavity

    I am currently renovating my kitchen and am looking for some advice in how to screed over a cavity. A section of the old screed layer has broken up around the edge of the patio door threshold. At the moment, there is a dpm under the patio door overlapping the cavity and meeting the main dpc...
  7. christophermason

    Blown Screed Removal - Wet Underfloor Heating

    I had underfloor heating fit 18 months ago and LVT tiles. The tiles were stuck down incorrectly byu the fitter when they were supposed to be click. They have warped and need removing. Upon lifting the LVT the screed underneath is blown. How can I rectify the blown screed to fit new LVT? The new...
  8. A

    Increase drying time for self levelling compound

    Hi. I need to level a 24m2 room, but it's only me doing it. I have bought Mapei 3240, and I see that it says the open time is 20 mins. I assume this is time I have to work with it before it starts to set? Is there any way to lengthen this time to allow me to mix further batches? I dont need it...
  9. DerMitchie

    Cuitting channels into concrete slab for plumbing and electrics

    We are having to cut out channels in our existing kitchen floor slab for a new kitchen island. I will need to place an electric feed for the sockets; cold feed, hot feed and a gas pipe. I will also have to re-do some drainage so will dig out for that and re-cover. So I guess I'm keen on...
  10. B

    Screed for garage floor

    Thank you for reading this message. There are a lot of posts already about floor screeds. But briefly, which screed please is right for a double garage floor that has an existing concrete floor with like a ripple surface effect, ripples up to about 3 mm height. Thank you.
  11. A

    How to put Extractor Ducting Under Screed

    Hi, please can someone help me here. I’ve had my garage converted to a kitchen. Floor was lower in the garage compared to the level of the existing house. Anyway, I am having an island with a downdraft extractor. I have UFH installed and the builder has forgotten to put in the ducting for the...
  12. JamesGibs0

    Floating Screed, cracks and movement

    We have had an extension and wet UFH installed across the whole ground floor (new and old). UFH in the new extension is clipped on top of celotex. UFH in the existing is embedded in an insulation board. - about 45m2 in total We've had a floating screed installed (Longfloor CT-25/F5) and 3...
  13. LisaYP

    Screed over safety floor in wet room

    Hi, I have a wet room, (made when i had a grant because of spinal problems) and in it the floor is safety flooring, like the kind Alto do but its grooved like an embossed pattern in it. Its not smooth which is my problem. I dont have the spinal problems anymore and want to put a shower tray and...
  14. Vchristina1

    cracking screed at edges abutting patio doors

    Hi I apologise if this has been posted many times before but I did try and search for the original advice but couldn’t find it We bought a new build property and the screed is cracking - the builders came, dug it out and relayed it and it crumbled a matter of days later again even in dry...
  15. D

    Blocking up ground floor internal doorway - does it need dpc? etc

    Single leaf breeze (not supporting). I dug a 100sq test hole in the ctr and found conc. below the screed so I figure using conc. blocks will be ok. Do internal walls require a dpc? I'm assuming it would be good practice to dig out a channel in the screed and block up off the concrete below...
  16. J

    Screed on unknown asphalt/cement mix 1930. What to use

    I have removed my old finish floor board and came across some type of asphalt/cement mix slab 90mm thick. Black colour As this is a little bit uneven and would like to have a finish level all around the ground floor I have started to get someone to quote me for a screeding. I never thought...
  17. D

    Screeding the shed

    Hey everyone! I am building a concrete block shed, or rarher two sharing one wall. Each one a bit smaller than 7x5 meters. I am about to pour foundation, 60cm deep, 30cm thick and take the blocks from there until i get a bit over the ground level. Next i will want to lay a concrete slab within...
  18. K

    Lifting Karndean floor

    HI I have a karndean floor (da vinci) which i thought would be down for life, but after 11 years 1 tile started curling up in a corner and was like that for a year or so. Its in a high traffic area with central heating pipes underneath. We assumed it was the steam cleaner and ignored it. Then we...
  19. L

    Making floor for basement conversion (ed.)

    Hi, I did have an account on here a few years back but can't login.. So I'm converting our basement into the babies future playroom but I'm stuck on floor choice. My current substrate is the original brick type floor which was possibly laid when the house was built c.1870. My main goal is to...
  20. P

    How to install floor insulation

    We are converting our garage into a living space, the floor construction is DPC, 2inch insulation and 10inch slab. We need to make up the floor level by 160mm. We are told we can just skim over with self-leveling as the floor isn't that bad, directly lay 120mm Kingspan, then lay directly ontop...
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