Questions tagged [waterproofing]

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Proper sealing for brownstone roof dividing wall

TL;DR: For a four-storey New York brownstone with flat roof how should the dividing parapet wall be covered/sealed? The brownstone has a rubber-like membrane on the roof that is connected to brick ...
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2 votes
1 answer
67 views

How to retrofit this circuit to be able to run a bare ground splice to another appliance?

I'm adding a #8AWG bare ground in order to retrofit a 3-wire range socket into a 4-wire one. I will be splicing into an existing water heater circuit to get the "at least #10" ground that is ...
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1 answer
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What is this rubber seal under the grout in my shower?

I have a shower which has a join between glass and marble which has recently started leaking. As a first step, I've removed the grout for replacement, but it looks like there's some sort of rubber ...
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Cracks and holes in tile floor grout. How urgent is this to fix?

This is related to What to do about holes in tile grout?, but it involves a whole-house tile floor rather than a shower, and my question is not about how to repair it, but how urgent the repair is. ...
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1 answer
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Flooring covering for a bitumen balcony

Hello I have wood balcony that I made by making my first floor longer then my second floor, so basically my balcony is unfinished uncovered part of my second floor and fenced all around. In any case, ...
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2 answers
52 views

Waterproofing garage with wood siding on concrete slab

I am looking for ways to waterproof the bottom of my garage. Last year I removed a concrete dog run that the previous owner had. Now, the wood is directly against the earth (with everything melting ...
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Flat roof, where electric mains enter via conduit, leaks in heavy rain - does a cover for this exist?

I have a section of the roof on my house that is flat, and across the roof runs a conduit that carries electrical from the main panel to subpanel. In very heavy rain, water enters through a square box ...
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Water entry into basement in tricky area

I have a tricky water problem. Whenever there is heavy rain, water seeps through cracks in the basement wall underneath the basement window in the picture. The plastic cover seems to help a little but ...
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Is it possible to just pour epoxy on wood to make a shower tray?

I need to build a shower real quick, so I am about to use Kerdi boards to do that. I do not have the time to tile (and not the funds to have someone make it), so I was wondering if I could just use ...
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0 votes
1 answer
54 views

Using Redgard as a second waterproofing layer

I put in a PVC Liner, then my final slope. Can I Redgard the final slope all the way to the drain or will having 2 waterproofing layers on the shower pan trap moisture or something?
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2 votes
1 answer
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What does the detection of high moisture levels in shower walls imply?

In the annual timber pest inspection report, there is something about high moisture levels being detected in the shower walls together with these photos: I recently re-seated the shower taps and ...
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Sealing the base of a metal-sided building built on a slab

The store we own is old. The original building is 100+ years - but the problem we're facing today is a stick-frame metal-sided addition (lean-to, 3 sides attached to the original building). This large ...
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1 answer
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Which cement to use on a fountain

can someone tell me the correct cement to use on an exterior water fountain surface. I am a decorative artist and wish to "texture" a fountain with white cement that I will tint myself. I'm ...
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7 votes
3 answers
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Should a tiled shower ceiling have cement board instead of drywall?

My contractor used mold resistant drywall for ceiling in shower stall; ceiling will be tiled. The stall will be surrounded by frameless glass and there will be about 4" gap from ceiling and the ...
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1 answer
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Waterproofing bathroom: where does the water go

I've been watching some DIY guides on waterproofing a bathroom, for example: https://www.youtube.com/watch?v=TmrFUgI1C58 My question might be obvious but it's unclear to me; waterproofing protects the ...
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1 answer
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Advice on injectable silicone-based damp-proof course

I have a 140-year-old house of heavy masonry (bluestone/basalt) construction. It is built into the side of a hill with about 25% of the "basement" actually below ground level: You can ...
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15 votes
4 answers
4k views

French Drain: Why do I need 3" of rock bedding beneath the pipe?

I'm having issues with a leaky basement in the Portland area. There's dirt, mud, and vegetation outside of my foundation wall, and it's absorbing lots of rainwater. 4 feet of it is inside my property ...
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3 answers
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Is coating basement walls with water-proof cement a proper method to water-proof your basement?

I'd like to make my basement more livable (i.e. build a bathroom and bedroom down there). It is "finished" but not to a level where someone could live there comfortably. The air is certainly ...
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3 votes
1 answer
123 views

Does the drip edge need to be nailed into the OSB sheathing or framing also

From everything I am reading online I am seeing the drip edge should be nailed with 1.5” nails but I can not find clarification if I need to try and hit the rafters each time which are 16inches on ...
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0 votes
1 answer
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Easy way to seal some pinhole leaks around my steel hatch with flex tape

I have a steel hatch to my basement that sometimes leaks under heavy rain. I've noticed that it's just one side of the hatch and if it's a sunny day I can see what looks like a few pinholes that the ...
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0 votes
1 answer
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Waterproof dam wall

I have this reservoir, located in an all-stone wedge in the terrain. The water is held back by a small dam, consisting of granite boulders held together by a mortar. As is evident from the water ...
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1 vote
1 answer
67 views

How can I deal with condensation on the vapor barrier in my basement energy walls?

Climate Zone 5A (Eastern Nebraska) I’m needing guidance on properly insulating basement walls that already have 6 mil poly fastened to the wall as part of a basement perimeter drain system. I recently ...
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Waterproofing mortar over hydraulic cement

A 2sqft section of my poured-concrete basement wall has begun weeping. It seems that the concrete was not mixed thoroughly in this area and after 80 years the water has found its way through. There is ...
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0 votes
0 answers
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apply roof primer & sealant in sections?

I’m currently pressure-washing a 100ft X 100ft rough concrete roof so that I can coat it. The problem is that it’s a pretty big area. My question: can I pressure-wash and treat by sections? For ...
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"Good enough" moisture control in basement for insulation

Summary: I would like to insulate the upper half of our basement walls with rigid foam. I know that our basement walls show some signs of excess moisture, but I'm unclear on the sources of that ...
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How long does Redgard last after open? How do I store it for long term (6-7 months) so I can reuse it?

I have used a half of the bucket of Redgard waterproof membrane liquid and I would like to store the rest of it for another 6 months or so till I do the other bathroom. What is the correct way to ...
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1 vote
3 answers
147 views

Fix Hole in Foundation

I have a hole in my foundation that is letting a ton of water right into the crawlspace. I think it formed over several years from a gutter downspout that wasn't functioning properly (I plan on ...
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Water leaking through floor grout next to tub

We purchased a home last year. Found that there is a leak in the basement after the shower runs. Through several weeks of investigation, including opening walls and basement ceiling, we have located ...
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0 votes
1 answer
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Temporary washing machine installation

I had a plumbing leak that took out my laundry room floor. I had a custom ceramic tile floor that had a drain in the middle to catch leaks. Now the floor is removed and I'm left with only the ...
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1 vote
1 answer
60 views

Finished basement question

Some background. I have french drains in half my basement, in the area where my water pump is. I just installed a laminate floor, and put up walls. My question: I recently had some water get in my ...
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0 votes
1 answer
294 views

Is this white paint on basement wall asbestos?

Some fibrous paint is starting to flake off my basement wall. Is this asbestos? Or, is it some other material that’s waterproofing? Do I need special considerations when removing or repairing this ...
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161 views

Is it OK to use Kerdi band to seal the transition from cement board to shower base and use unmodified cement only for that area?

Is it OK to use Kerdi band to seal the transition from cement board to shower base. I have a corner shower base installed in a corner built using cement boards On one wall the cement board sits on top ...
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6 votes
3 answers
3k views

Water leakage in new house - is this common or an issue?

I am planning to purchase a house from some builder and I have finalized some properties. All are newly constructed houses. In one of it, I can see some water leakage in walls due to rain. Is this ...
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Can you use waterproof membrane to make the thinset adhere to the shower base

Most the procedures I have seen show how that you tape the join between cement board and the shower base and then you apply thinset over that to the point that the thinset is flush with the cement ...
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1 answer
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Installing fiberglass fabric before the second layer of waterproof membrane?

In this video the guy is installing a fiber glass fabric before the second layer of insulation. I think I have seen something similar in the Kerdi videos. Is this something I should use with cement ...
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0 votes
2 answers
42 views

Water sealing outer corners of a shower tray

Hi all and thanks in advance for any tips given. I am doing a bit of DIY repairs of my leaking shower. Long story short I had to take down tiles, plasterboard, shower tray and replace part of subfloor ...
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Replacing the concrete around the house, best way to waterproof?

I'm looking to replace damaged and cracked concrete around the house. What would be the best way of waterproofing ? We definitely will do the pitching away from the house, but do we need to install a ...
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0 answers
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Increasing air intake in the attic to prevent ice buildup on the roof during winter

We bought a townhouse in 2018 in a Canadian city where we have frequent snowfall during winter. Here are pictures of the back and front of the house. In the last two years, we have had ice dams on ...
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How should we complete this laminate installation?

Problem I purchased some pergo gold underlayment and pergo waterproof laminate flooring and installed it in the kitchen with my brother. This was our first time ever installing any type of flooring, ...
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1 vote
1 answer
91 views

How do I seal shower wall if no space for seam tape?

I had to remove a section of my shower wall for plumbing repairs. The wall is currently drywall. I want to fill the hole with Fiberock. I was unable to remove the tiles from the drywall, so I had ...
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1 vote
1 answer
290 views

Should one use modified thinset when using a waterproof membrane like Redguard?

As far as I understand they require us to use unmodified thin set when using Kerdi™ boards or the like. Because they are waterproof, in case you would use modified thinset this will trap the moisture ...
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1 vote
0 answers
37 views

Water ingress in panelled doors

I have some exterior paneled doors. We have some minor water ingress and weeping at the panels. The panels are typical floating panels in a well-made hardwood door. What is the general solution to ...
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1 vote
0 answers
30 views

What will be left if a latex sealant is mostly washed out before it can set?

I tried to seal an area by a door that puddles and leaks before tropical storm Henry arrived, but I made two mistakes: I applied the sealant only 30 minutes before the storm hit (it needs 1 hour to ...
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3 votes
3 answers
230 views

How to seal gap around bottom of shed, between ground and planks?

We started building a shed in our garden. Now we would like to close the sides using wooden planks. To keep the wood in a good state as long as possible we want to leave a gap between the lowest plank ...
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2 votes
0 answers
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How can I waterproof a tile soaking tub?

I'm in California. I want to build a tile soaking tub in an upcoming bathroom remodel but I'm unsure how I should waterproof it. I recently was at a spa where they had deep and narrow soaking tubs ...
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2 votes
2 answers
189 views

Do I need to caulk where my roof meets the siding?

I'm not sure if the seam needs to be caulked where the roof meets my wood siding. There are some areas where it looks like it was once caulked but the majority of it does not look caulked. Should the ...
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-1 votes
1 answer
45 views

Water Damage sides of the shower

Anybody know if this is just a patch job or should I get a professional to look for further damage? I peeled off the existing primer/ paint then this is what I got. Can I just remove the mold and ...
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2 votes
0 answers
135 views

Do IP65-rated LED strips need a wet-rated channel enclosure too?

As I described in this question, I'm planning to mount 12V LED strips under the treads of an outdoor wood staircase. The strips I'm considering are rated IP65. Does the aluminum channel enclosure also ...
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0 votes
1 answer
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What sheeting thickness for water barrier on landscape?

I had a structural engineer come out today who said I'm borderline needing to stabilize my foundation. He said, if I can manage the water outside my house better, I would be very much likely to need ...
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0 votes
1 answer
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What are signs that you used enough or not enough wood protector outside?

This weekend, I did the big job of sanding down a wood window-frame and then reapplying the wood protector. It is now raining, and my insecure brain is freaking out that I might not put down a good ...
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