How to fit an external vent cover - install hooded air cowl vent cover
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- Опубліковано 19 січ 2023
- This video shows how to fit a hooded external air cowl vent cover over an existing plastic double air brick. It can help protect against wind and rain. *Important note* please ensure that any installation of hooded cowl and/or vents in dwellings comply with Building Regulations Part F, and that they are installed in accordance with the manufacturer's instructions. Often the manufacturer and distributor will state if the specific cowl complies with Building Regulations Part F (which helps). Please remember that ventilation for gas appliances and extractor fans may have different requirements than those for air bricks and hence should be installed by a competent person.
A link to Building Regulations Part F is provided below: www.gov.uk/government/publica...
airvent #vent #diy If you'd like to support the channel please like and subscribe. The equipment used in the video is listed below with links.
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Equipment used in the video is listed below:
1. Hooded Cowl Vent Cover (terracotta SmartHome) 9” x 9” amzn.to/3TKRXHI
2. Hooded Cowl Vent Cover (brown option Timloc) 9” x 9” amzn.to/3LUfkgq
3. Sealant and Adhesive CT1 Tribrid 290ml amzn.to/40jYEmy
4. Sealant Gun ProDec MG11ES Extra Strong Skeleton Caulking Gun, Sealants, Silicones, Adhesives 400 and 310ml amzn.to/3z9Rky5
5. Screws and Raw Plugs UNO 5mm amzn.to/3Zi4WSn
6. Masonry Drill Bit Bosh SDS-plus-5 - 5mm amzn.to/42FGg9n
7. Bosh Corded Impact drill 240v 600w amzn.to/3lIAfYS
8. DeWalt Maxi Fit Telescopic Screw Driver amzn.to/3JPRKyE
9. Magnusson Torpedo Spirit Level 225mm amzn.to/3za0qe8
10. Silverline Hardwood Cross Pein Pin Hammer 4 oz (113g) amzn.to/3ZstAQE
11. Ear Plugs - De Walt EU, Dewalt, DPG12BG50 amzn.to/40ic2HY
12. FFP3 Facemask available from any local DIY store or this link amzn.to/40Gtd5R
13. Grade F Safety Glasses available form any local DIY store or this link amzn.to/40LtiFd
*Disclaimer: The equipment list above contains affiliate links, which means that if you click on one of the product links and purchase a product, I may receive a small commission. This doesn’t cost you - the viewer - anything. I assure that only the tried-and-tested equipment that I regularly use, and trust are featured on the list. I refuse to list or endorse poor quality equipment, materials, and products that fail to meet my expectations. The links also aim to offer additional information about equipment and products that you might find useful.
Thanks for the video if only my issue was on the ground floor.😢 mine in is the ensuite upstairs, when windy it make a right rattle during the night.. is there an indoor solution so I can fix this from inside the house rather than risk my life on a monster outside ladder 🪜
Hello Gaz,
Thanks for the message. Unfortunately, I haven’t come across any methods of installation from the inside (that isn’t to say it can’t be done). My advice would be safety first. If you’re not familiar with working at height safely, then I wouldn’t risk it.
If you consider installation of cowl, check that it’s suitable for your specific appliance (meets Building Regulations Part F) - the company you’re buying from usually informs of its suitability - which helps.
An alternative method could be the use of small single sided neoprene adhesive rubber tape on the flap to dampen the tapping sound on closure.
All the best
I have a downstaris toilet i get a lot of condensation on thee outside wall would itbe better with exstractor fan fitted in the outside wall or just a vent as we dont have the heating on in the toilet, as if i leave window open there is no condenstaion on the wall at all, but when i close window there is load of condenstaion on the outer wall
Hello Charles, it's difficult to comment effectively on specific cases as I don't have all the details. However, I'll try to offer a little information to help- then you can decide what you think works best for you. The current UK building regulations document - 'Approved Document F Ventilation' (2010 approved 2021 edition) point 1.10 states 'Ventilation may be delivered through natural ventilation, mechanical ventilation or a combination of both.' In both bathrooms and sanitary dwellings (e.g. toilet & sink only), extract ventilation is recommended (point 1.17). So, you could consider having mechanical ventilation (extractor fan) installed to help (rather than a standard air brick vent). Increasing air flow is key. It’s also important to consider the main cause of the condensation. If it’s the usual culprit (shower or bath), then the logical step would to be to install mechanical ventilation. It’s also worth checking other sources of potential moisture in the room (e.g. is there any water ingress from faulty windows, pipes, and even outside - gutters, roof, pointing in brick work and address any obvious issues too.
Because the building regs are a little heavy reading check out this handy website for further details www.plumbworld.co.uk/blog/everything-you-need-to-know-about-bathroom-ventilation
building regs are here assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/1045918/ADF1.pdf
If I put these on all our downstairs air bricks, would it be bad for airflow under house (suspended wood floors with insulation fitted) ?
Hello Craig, thanks for the question.
It isn’t always straight forward to answer. An array of factors can influence air flow in specific properties, and different locations, but I’ll try to offer as much information as I can so that you can make an informed decision.
In this video I show installation of a hooded air cowl to cover a double air brick/vent under the window (air brick installed to increase ventilation in the cavity wall). Cowls tend to be installed / recommended mainly for specific air bricks that are positioned in exposed areas to reduce uncomfortable air ‘blasts’ and water ingress during high winds and bad weather (not necessarily needed/recommended for all airbricks). Or they are considered in instances where you notice an obvious problem. For example, the air gusts entering our living room space from one airbrick were so notable that some evenings it managed to extinguish decorative candles on the side.
In your case….. As you probably know, air bricks used to vent underfloor-timber suspended floors, such as Victorian properties, are extremely important to prevent sub-floor condensation, damp and decay. You also have insulation (not sure what kind) - good idea if done right. It’s advisable to offer as much airflow as possible in these circumstances, unless of course there’s an obvious problem (wind blasts, water ingress damage via a specific air brick). Many hooded cowls do meet NHBC requirements and building regulations (check with manufacturer), and permit void ventilation (which is good), but ultimately they could reduce airflow in some conditions. I hope you appreciate that it is difficult to comment effectively on the impact that your proposal might have specifically on airflow under your specific house (upon suspended wood floors), as there are many factors that impact air flow. We tend to use them only in instances where it’s really necessary (as mentioned above). It’s worth asking the question what is the reason for wanting to install them? I hope this helps…..
**Important note** For others reading, please note that air bricks which are installed for gas appliances should only be installed by a registered professional - please don’t attempt this yourself.
Please find some links below that you may find helpful.
NHBC Damp proofing and ventilation: nhbc-standards.co.uk/5-substructure-ground-floors-drainage-and-basements/5-2-suspended-ground-floors/5-2-10-damp-proofing-and-ventilation/#:~:text=In%20the%20case%20of%20timber,concrete%20and%20timber%20suspended%20floors.
Build regulations 2010 C: section 4 floors page 25 assets.publishing.service.gov.uk/media/5a8192a0e5274a2e8ab54b5f/BR_PDF_AD_C_2013.pdf
www.fastbuildsupplies.co.uk/knowledge-hub/air-bricks-and-underfloor-ventilation-building-regulations/
@@makeitwork-propertydiy10 Thanks for the reply.
Can only using silicon sealant to attach is enough?
I attached the hood using screws, raw plugs and CT1 which is a combination of adhesive and sealant (see details in the description) because this is the most secure method. A good exterior adhesive and sealant combination might work ok if the hood is light enough and the wall surface has good tact, but may be less secure than screws. I hope that this helps. 👍🏼
What size drill hole and plugs ?
Hello Naveed, I used yellow 5mm raw plugs and 5mm drill bit. It should be more than enough to hold the cover as it’s not heavy. I hope that helps….
@@makeitwork-propertydiy10 perfect thanks!