dpc

Please see the video attached - it explains everything quickly. This is a 1936 house, with cavity walls. The walls contain rockwool type insulation and the builder thinks the bricks need a coat of water repellent. I also intend to clear the cavity at some stage. However, this post relates to the...

Hi all, We're getting pretty close to completing on a 1920s/30s solid wall semi, so I've decided to finally stop lurking and make an account here. We had a survey done prior to exchange which noted high damp readings in a couple of places, as well as a few potential causes: 1. Pebbledash...

Hi All, As part of a full renovation to a 1906 bay fronted terrace, I have been attempting to solve a number of damp issues that have affected the downstairs front room, largely around the bay window and porch areas. I think (hope!) I am mostly there but am somewhat stuck on how to detail the...

The previous rendered plinth was swollen and has been removed. It appears the ground has been raised with concrete by previous owners to create a slope away from the house and the original victorian DPC (some sort of tar) is now only about 2 inches above the ground. There is no particular damp...

Hi, We had a new patio laid a couple of years ago. We had some concerns at the time (sandstone slabs laid on a ring bed of cement not a full bed), slabs too high v damp proof course and air bricks, slabs built right up to house walls. We've started to get a lot of woodlice in the house and are...

~Vaulted kitchen asymmetric roof single storey extension ~Block work with cavity supporting Catnic type RSJ ~Bespoke glazing (2 x triangular) on RSJ ~Sliding doors under RSJ ~Ali cladding C section over external of RSJ My concern pre door/glazing install is the detail on the RSJ with the...

Hi Have recently repointed my west facing (prevailing weather) wall and it all went well. I'm not sure what to do with the dpc course though. It's slate but has come away with the old pointing in places (I've not raked it out). It feels like a bad idea to point over it and create a moisture...

Solutions for this cavity against the wall below door frame. Looks like previous had new flooring installed. The threshold going outside is fine.

Could I get your thoughts? Two years ago, a contractor completed phase 1 of my renovation, creating a passage to an annex. This resulted with a 7cm step down. I now plan to raise the floor level but noticed efflorescence on the concrete at the patio doors. Can I use a Bituthene layer to close...

I live in a 1920’s semi-detached house with solid walls. As we’ve moved into winter/wetter weather I’ve noticed a tide line beginning to appear on part of the hallway wall leading to the stairs. The other half of the hallway closer to the front door does not have this issue. We have also...

Hi folks, I just stumbled across this site and its going to be a huge help (I hope). Just started renovating a property purchased on auction. It's for me to live in not rent. It is in poor condition and although I'm not a builder I am a quick learner and willing to give it a go. I have huge...

Hi All, Just carrying out a diy project of installing new casement window where old wooden sash window was. I am confused regarding 2 points. Firstly the old wooden sash frames had vertical DPC pinned into the frame and pushed into the cavity. Would I need to replace this with UPVC casement...

Good morning, I am looking for some advice regarding my proposed solution to repair a 1920's concrete floor. The internal concrete floor is about 2 courses above the DPC. Consequently, the DPC was being bridged causing damp. I have dug a 6" trench around the perimeter of the room, to...

Hello, could do with some advice if possible. I am interested in buying a detached property which is roughly 100 years old. No DPC has been fitted. But instead 62.5mm of Celotex has been fitted throughout the house. (The house was renovated over the last year or so) The house is known to of...

Hi everyone, just looking for a second opinion on our filled-in gully! We recently found a broken drain below the gully outside the kitchen of our 1910 house (which the sink and washing machine drain into, so this had just been pouring into the ground for who knows how long!). We have just had...

I’ve recently moved into a house with a recent (5yrs) flat roof extension out the back. The extension has parapet walls topped with coping stones. Not long after we moved in we noticed damp at the right angle with the ceiling and after an inspection of the roof it seems there is either no DPC or...

Basicly I've removed my old conservatory in spring I was going to remove the concrete base as well but damaged my back when doing this. So over the summer I just laid square decking tiles over the old base to tidy it up in the knowledge I'd have to remove them and the base soon as its a brick...

There is a bit of damp in the external solid walls of my house where the patio has been built up above the level of the DPC, bridging it. I believe it may have also covered air bricks so the underfloor void is unventilated. I've sketched the current arrangement. I'm considering what would be the...

I've recently had an issue with damp next to a party wall where we had a unit pushed up to it. We're fairly certain now it was condensation / lack of air movement. Neighbour has no problems on their side. The skirting board was rotten, so I've taken it out and was surprised to find a second...

These engineering bricks have grooves on one face. Do the grooves serve a purpose ? Such as a better key for rendering over ? How would i search for this type of brick, as the lower half of my property is rendered and I need some for an extension. Alternatively, after Ive laid up to DPC with...