missing damp proof membrane

[martin hill]

Woody quite right. The tanking is something people do on a house that has damp. Can be hit and miss if it works. 25 YEARS in my mid terrace and 2 damp proof failures. You paid thia builder to do a job to a certain spec. Tell him you want that spec. Please please tell me you not paid all monies upfront.

 

[backupnorth]

Thanks guys. confrontation with builder this afternoon.

 

[martin hill]

Thanks guys. confrontation with builder this afternoon.

Go down the "chat about the issue route first" Not a confrontation.

 

[backupnorth]

Hi Martin

still have retention

also trying to get building control involved

 

[martin hill]

Maybe a good idea to have a meeting with the builder and BC at the sametime on site. Builder less likely to baffle you with a cheap remedy job.

 

[backupnorth]

Point taken Martin. However he wants to screen kitchen over underfloor heating and then turn heating on low to dry out screed before vinyl floor is fitted. Several people have told me this is a no-no. He has badly over-run and I think he just wants out. Good idea about BC + builder

 

[martin hill]

No Let the screen dry naturally or see the screed makers wedsite for drying instructions. If not already paid in full dont hand anymore money over.

 

[bobasd]

OP,
for nothing but i'm curious.
i asked you above in post#8 where exactly your DPM rises, and were the walls built off the specified "strip foundation" or the slab itself?

 

[Notch7]

Point taken Martin. However he wants to screen kitchen over underfloor heating and then turn heating on low to dry out screed before vinyl floor is fitted. Several people have told me this is a no-no. He has badly over-run and I think he just wants out. Good idea about BC + builder

65mm Cementitious screed takes about 80 days to dry. Forced drying with underfloor heating will make it crack, not worth the risk.

Have a look at mapei top cem pronto fully dry in 4 days and has higher thermal conductivity so ideal for underfloor heating.

https://www.mapei.com/gb/en/products-and-solutions/products/detail/topcem-pronto

 

[backupnorth]

Sorry for delay

bobasd attached file shows walls oops sorry need to reformat as site rejected it *(.docx)

Notch7 he is getting someone in to lay Belitex which I believe can be walked on after 24hours or so and we can get vinyl laid after 14 to 21 days (much better than 120 days for 75mm of normal screed)

 

[backupnorth]

Hi bobasd

see pics
For A looks like half a block on slab then row of blocks, for patio door, on outer skin of blocks with no DPM in front

For B blocks built on outer skin of blocks for window with no DPM in front


Not sure what is under window or patio door (A)

 

[backupnorth]

building control phoned said they don't do queries over the phone and to email them. No answer after 2 days!

 

[backupnorth]

Building control have visited. Not happy with height of patio. Initially wanted all patio taking up and dropping but have settled for a solution similar to Martin Hill's of strip to be cut out next to house, drain installed, membrane against wall and fill with decorative stone. They are not too bothered by lack of membrane inside as long as outside is controlled