dpm

Hello, I’m planing and laying click flooring on our ground floor. I intend to screed to get a good level using NA. Most of the ground floor are marley tiles. I’m planning on either screeding over the tiles or remove, depending on how easy they come up. ( I’m aware of the asbestos issues and...

My first question is, my architect has not included a level threshold detail for my bifold doors. Can I differ from the drawing without having it approved? Can my BCI just approve a method? can someone explain or show me the detail for a level threshold? (Beam and block floor) I would’ve...

Hi all, looking for some advice with a garage suffering from damp and mould. the garage wasn’t used for storing a car when we moved in and that’s never changed. It had a carpet down and a condenser tumble dryer, fridge freezer, a bench and some free weights and other random things stored out...

Morning all and happy new year, new this out of the way here is my question. We want to convert our attached garage into a living space. The garage floor is 100mm lower than the inside floor, would it be possible to put a course of brick across the doorways (will have to have new shorter doors)...

Hello all! First time poster: I have a semi-detached house in a high water table area and I noticed that under the suspended wooden ground floor there was some standing water. I carried out some investigation and it appears that more water flows into the crawl space (approx 4ft high) in when...

Hi i have a garden flat in a victorian terrace and am about to undertake a single story side/rear extension. A builder told me we can build using the existing brick garden wall. i have a couple of queries: 1. I presume he doesn't mean just insulate the garden wall. is this even possible? I'm...

Evening Ladies and Gents. I moves into a house with a garage conversion and have been renovating from what the previous owners did. For the flooring they had installed carpet laid over hardboard, however there were signs that the hardboard had become damp over time. In order to improve upon...

Hi, my house is on a bit of a hill so the external wall has previously been painted - I assume it’s a damp proof paint, it’s black and stops just before floor level. It’s a bit shabby and making the garden look a mess as it was hidden by decking previously. I plan to repaint it and Drybase DPM...

During the build of our extension the builder built the walls (outer and inner) before laying the slab. This means the DPM does not go under the course of blocks containing the DPC. Is this a normal practice these days? There is also a gap between the end of DPM in places and the DPC, can this...

I blocked up the old car port to convert it domestic use. It has a membrane under the conc slab but building control say I also need a dpm over the slab and slightly up each wall: makes sense I suppose, it'll have a plywood floor + engineered wood, on battens. What type of membrane do I need...

Hi - I am hoping somebody might be able to help me please. As you'll be able to see in the attached photos, I am getting water in brickwork above the DPM after heavy rain. The affected walls (to the left and right of my front door) are covered by a porch and it is not possible for rain water...

3 old pitch pine joist ends are partially worm eaten at the sides. It's not bad and appears to be shallow only. Easiest to do is double up and bolt ons without chopping off wormed ends. Then again worm may not be dead, though my feeling is it is. Can I somehow treat in place wormed ends in...

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...