dpm

Hi I am doing an extension and had a trial hole dug for the foundations which was to 1.4m (deep due to trying to find good ground - point 1 below). The water table was oily/contaminated and ground is obviously made up ground. My council building inspector came out and inspected the hole and...

Hi guys, I have a section of wall that is damp to the touch. This is a stone and brick wall in a building dating back to late 1700’s. Interestingly it is only the last metre or so of the wall that suffers, the rest running across the house seems to be fine. I’ve added some photos of both sides...

Hi I will be using periscope vents to air under a block and beam floor and wondered about the below ground cavity fill. All the regs say to fill the cavity to 225mm below DPC although this will partly encase the vents in said concrete; is that okay? Also when I am at DPC the building inspector...

Hi It seems i'm trying for the record of the longest time taken to do an extension! I am hitting so many problems! After much advice & discussion with several structural engineers and the recommendation of the building officer, I am having the foundations for my two storey extension piled...

Hi All, I have just bought an old 2 story singleskin (no cavity) mid-terraced house that has suspended wooden floors throughout. Ive been hacking away at the ungodly amount of renovations that need doing and come across one that has me stumped... A more recent extension has been built running...

I'll be building a ground floor shower room. It won't be a wet room, but the tray will be directly on the floor. (Concrete, early 1970's, no insulation) The 90mm wide shower trap has pipe invert at about 70mm. Allowing 18mm/M fall, I'll need to dig down to ~ 110mm below ex floor at the point...

Hi, We have a large village hall that we've installed UF heating in - wet system, covered in 75mm concrete screed. We don't have the sufficient drying time so looking to put down a liquid DPM ahead of an engineered timber floor (all flooring, underlay etc is UF heating- compatible). We'd been...

Hello I intend to fit a new ground floor toilet in my early 70's house which has a concrete slab as the ground floor base, which will involve inserting a new soil pipe connecting to the existing set up. I am assuming that in doing this I am obviously going to breach the DPM. So two questions...

Hi Folks, My bathroom floor has had problems with damp and thinking that it was just condensation I pulled the Lino back to reveal pipes in the floor had been leaking. What is worse is whoever installed these pipes had also cut a hole in the DPC for the waste for the bath and never sealed...

Good afternoon everybody, I have recently purchased a house with old asbestos floor tiles. I am having these removed after being convinced by others to screed over - luckily only one bedroom and hallway was completed. The screeding/latex has laminated (like puff pastry) and is breaking up. I...

Hi, I have some quarry tiles which are very firmly cement bonded, good condition and dont seem damp. I want to law some glue down solid oak Parquet over them. My plan is to level the floor using Sika self levelling compound (floor is level but to give me as perfect a surface as possible) and...

hi all I have just laid a self levelling compound onto my old kitchen floor. Some of the old low levels were as low as 25mm from the highest point so I bought 16 bags of 25mm (up to) latex self levelling compound. The area to cover is 16 square meters. I think I haven't put enough down as the...

Hello, I want to stop suspected rain water entering through the exterior wall of my house, and causing damp in a downstairs room. The house is an edwardian house [1920s build, single brick wall, lime plaster. outside rendering looks about 1970s.] --- The room is downstairs with one exterior...

Hi all, I’m currently self-building an extension to my property. I’m adding an 8m x 6m single storey extension with steel work to possibly take a second storey in the future (when I win the lotto!) I’m wondering can I put the concrete floor slab, insulation and screed in once the roof is on...

hello all - first post! I am in the process of converting my garage to living space. Building control have said that we can lay several coats of liquid Dpm as the floor is the same level as the rest of the house. I want to fit a small shower room in there so I need to put up some studwork...

Hi all, We're installing a plywood floor in our 1800's home. At the moment the room in question has a concrete floor (which at some point was put down to replace an original floating wood floor) with a pathway in the middle that is original hallway tiles (the rooms either side of the hall were...

Hi I've opened up my fireplace and installed a lintel ready for the installation of a 5KW, 85KG log burner. As I got down to floor level I noticed it was very damp, so I removed the quarry tiles and found soil. I am intending to hammer in some hardcore lay some DPM and fill the 3 inch void...

Hi All Just registered so I could post this, any help most appreciated. There seems to be several schools of thought on here and other sites, so I thought I would raise my own specific thread rather than guessing on how to apply to my project. I've built a single skin block detached garage in...

Moving WC/waste in bathroom. We’ve unearthed and cut back the soil pipe as required. In doing so we’ve removed the DPM back to the edge of our trench (about 30 x 60cm). I’m concerned we should make good the DPM. I've considered removing more floor to expose good DPM so we can patch it somehow...