Cutting A Floor Hatch To Access A Basement - Flooring - Page 2 - DIY Chatroom Home Improvement Forum
Advertisement


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Flooring

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Like Tree7Likes
Reply
 
Thread Tools
Display Modes
Old 10-03-2016, 10:01 AM   #16
Newbie
 
Join Date: Sep 2016
Location: London, UK
Posts: 10
Rewards Points: 20
Default

Re: Cutting a floor hatch to access a basement


Quote:
Originally Posted by SeniorSitizen View Post
QUOTE:The location of access I hope to cut will be at the rear of my bedroom through existing 7mm laminate flooring, which has 2cm pine floorboards under it. The laminate is the old type glued together not the new type which clips. I believe there are 2" x 4" joists supporting (this is the standard for the age of house) but I cannot measure distances between the joists and this is my problem.

__________________________________________________ _____________

You seem to know the thickness of the laminate and sub floor as being 27 mm thick. Using a 1 mm drill bit extended from the drill chuck about 30 mm, locate the 2X4 joists. After locating those, set a portable circular saw depth to 28 mm and cut the hatch out.
hi thanks I've decided to go with HKStroud's article and the filed off jigsaw tooth blade afrom about 30mm depth and that has really helped.

I now know where the front to rear 2" x 7.5" joists are and with no holes in the hatch piece.

I call that success! Thanks to you though I can see what you're saying.

The way I did this was I confirmed the depth of the laminate flooring by sliding an unfolded safety pin down the plunge saw/oscillating saw hole (what a machine that saw is - it's really great just so sensitive a rea craft tool!!!) with a hook on the end, then twisting it and pulling, then fixing a bit of tape on the protruding pin to tell me the depth. Similar idea to yours. I'd previously only estimated it using a residual piece from a cupboard and the "standard Victorian" 2" thickness from a book. But the Victorian builders were notoriously non-standard with their wood thicknesses. No guesswork will do here.

These joists are probably, if my neighbour 4 doors down with same house config is anything to go by, 2" x 7.5". Not 2" x 8.0", no ....... 7.5"! But then again until I see mine, I don't really know.

I'm enjoying the job thanks to you guys on this website. I really appreciate the support.
piplewis is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 10-03-2016, 10:13 AM   #17
Newbie
 
Join Date: Sep 2016
Location: London, UK
Posts: 10
Rewards Points: 20
Default

Re: Cutting a floor hatch to access a basement


Quote:
Originally Posted by piplewis View Post
Now I have decided to visit my neighbours 3 doors away whose semi-detatched 2-storey home has the exact same configuration as mine built at the same time 100 years ago or more, and see whether they can shed any light on the position of the floor joists in their rear bedroom which is in the same position as mine is. They might even have their cellar opened up already. But if this fails, I'll just have to rely on my beeper and the measurements I've made and just hope I don't plunge straight into a joist...
The bad news is my joists aren't where my neighbours are in terms of proximity to the side wall. The good news is my plunge saw didn't hit one - it missed by millimetres though. It's easier said than done but the stud/depth beeper device was actually not far off the truth.
piplewis is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 10-03-2016, 12:04 PM   #18
Newbie
 
Join Date: Sep 2016
Location: London, UK
Posts: 10
Rewards Points: 20
Default

Re: Cutting a floor hatch to access a basement


It worked great. Still cutting the top, done one cut and now I know I have to cut a joist.

Can you recommend the type of saw for cutting a joist from the top which is 2" thick and about 7" depth? It will be up against the side of the hatch so my problem is there's no room for a circular saw The oscillating saw won't go deep enough. Just a hand saw?


Quote:
Originally Posted by piplewis View Post
And I bought some Bosch blades at a discount with the deal which are http://www.argos.co.uk/static/Produc...4557.htm#bv_qa I hope they are long enough I think they are around 60mm so should be good.
Quote:
Originally Posted by hkstroud View Post
Looks good. I think you will enjoy using that oscillating saw. Good price on jig saw also.

Draw your first cut line perpendicular to the joist parallel to the wall. You can make a straight cut with a jig saw if you take your time following a line but you will get a better cut if you use an edge guide. Measure the distance between the blade and edge of the foot of the saw. Tape down your edge guide that distance from your line. Your joist may or may not be exactly perpendicular to that line and may or may not be perfectly parallel to one another but that doesn't matter. What you want to do is cut out your laminated flooring such that it fits back in the hole exactly. That is more important than it being exactly square.

After making your two cuts parallel to the wall and know where the joist are you can use the oscillating saw to cut out the laminated flooring in the other direction, leaving the floor boards under neath. That will make you breath a little easier having the laminated flooring that you are going to reuse out of the way. You can then cut the floor boards with jig saw.

Suggest making some practice cut in some scrap wood with both saws to get the feel of the saws. Including making plunge cuts with jig saw.

Let us know how it goes.

PS
Make sure that the access hole you are planning to make is large enough for your needs. If necessary you can cut through a joist and then reinforce the joist from underneath if necessary.
piplewis is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 10-03-2016, 12:11 PM   #19
JUSTA MEMBER
 
Join Date: Feb 2014
Location: Central Wyoming
Posts: 12,570
Rewards Points: 108
Default

Re: Cutting a floor hatch to access a basement


Cut as deep as you can with the oscillating saw, then finish with a good hand pull saw.

ED
de-nagorg is online now   Reply With Quote
Old 10-03-2016, 12:30 PM   #20
Member
 
hkstroud's Avatar
 
Join Date: Mar 2011
Location: Virginia
Posts: 3,024
Rewards Points: 6,030
Default

Re: Cutting a floor hatch to access a basement


There is always the reciprocating saw. You probably don't want to buy another tool for this job but reciprocating saw is a very handy saw to have around. Can use it for lots of different jobs.
Next time you are at the store look at reciprocating saw blades to see if one will fit into your jig saw. It's not likely but it just might fit and be long enough to cut the joist.
hkstroud is offline   Reply With Quote
Old 10-04-2016, 06:04 AM   #21
Newbie
 
Join Date: Sep 2016
Location: London, UK
Posts: 10
Rewards Points: 20
Default

Re: Cutting a floor hatch to access a basement


I think this blade should do the trick if I fit it to my jigsaw. Since it's a Bosch Swiss product I feel confident it will cut through the joist like cheese.

My new query is this.

I'd like to cut the joist from above the laminate, as this will enable me to hold the jigsaw flat and keep a straight cut. If I try and split the board/laminate sandwich away from the joist the boards are nailed to in situ i.e. levering them up bit by bit, that would be a far less satisfactory way than having the whole piece upside down and using my new oscillating saw to detach the joist cutting through the nails on a bench. This would preserve my hatch "cover" in better condition I think.

But if I do cut the square hatch out with my new 250mm blade through the joists, the downforce of the 7.5" x 2" x 800mm cut section of joist will pull the hatch opening down with force of say 50-100N (assuming 5-10kgs mass) at one end, then when I cut the other it could easily fall on the floor of the basement.

I can't think of a good way of supporting and stopping the hatch from "falling" through whilst sawing the hatch.

https://www.campbellmillertools.co.u...0mm-2608667394

This is my latest challenge

Ideas welcome of course - from anyone. So far, so good.



Quote:
Originally Posted by hkstroud View Post
There is always the reciprocating saw. You probably don't want to buy another tool for this job but reciprocating saw is a very handy saw to have around. Can use it for lots of different jobs.
Next time you are at the store look at reciprocating saw blades to see if one will fit into your jig saw. It's not likely but it just might fit and be long enough to cut the joist.
piplewis is offline   Reply With Quote
Old 10-04-2016, 10:17 AM   #22
Member
 
hkstroud's Avatar
 
Join Date: Mar 2011
Location: Virginia
Posts: 3,024
Rewards Points: 6,030
Default

Re: Cutting a floor hatch to access a basement


If I understand correctly you have cut the entire perimeter of the "hatch". You have cut through the laminate and the floor boards below.

You said earlier that the laminate was the old type where the strips of laminate was glued together. This was probably the first type of laminate flooring to come out called Pergo.

If I remember correctly this strips of laminate were glued together but not glued down to the surface underneath.

If that is correct you should be able to lift the laminate of the "hatch" out. Then remove the boards of the floor. The boards of the floor will be fastened to the joist below. You can pry them up since you don't have to preserve the boards.

If the cut section of laminate feels loose put a strip of double sided tape on it, remove the tape backing. Lay a small piece of smooth wood on the tape. Double sided tape sticks. It really sticks if pressure is applied. If you put two pieces of wood together with double sided tape and put them in a vice and clamp together it is almost like them being glued together. So lay the small block of wood on the tape and then stand on it. You can then lift the laminate out.

If you can't lift the laminate out, put a strip of double sided tape next to each of the cuts that are parallel to the joist (hatch side). Lay a strip of wood on the tape overlapping the cut itself. Stand on it to make it really stick.

You can then cut the joist and the "hatch" won't fall through when you cut the final joist.

If you can lift the laminate out you should be able to then pry the boards up. If you can get the boards up and out of the way, you should be able to cut the joist the rest of the way with the plunge blade of the multi tool by coming in from the side of the joist.

Last edited by hkstroud; 10-04-2016 at 10:29 AM.
hkstroud is offline   Reply With Quote
Old 10-04-2016, 10:42 AM   #23
Member
 
hkstroud's Avatar
 
Join Date: Mar 2011
Location: Virginia
Posts: 3,024
Rewards Points: 6,030
Default

Re: Cutting a floor hatch to access a basement


If you have a discount (cheap) tool outlet like we have here (Harbor Freight) you could purchase a couple suction cups like shown below. ($3.99)

You will probably need one to later to lift the hatch out if you don't make a finger hole.
Attached Images
 

Last edited by hkstroud; 10-04-2016 at 10:45 AM.
hkstroud is offline   Reply With Quote
Old 10-05-2016, 04:22 PM   #24
Member
 
KarenStein's Avatar
 
Join Date: May 2016
Location: Missouri "Bootheel"
Posts: 213
Rewards Points: 426
Default

Re: Cutting a floor hatch to access a basement


An ordinary reciprocating saw will easily make a nice cut through a joist, straight down from the edge of the opening. Trouble is, you probably don't want to do that.

When you cut the joist, you will want to bridge the opening, transferring the load that joist carries to the joists on either side. You will also want that 'bridge' piece to support the edge of the floor, especially if your subfloor is made of tongue & groove strips set on a bias.

So, you'll want your final cut to be about an inch under the edge of the floor. A reciprocating saw (Sawzall) won't fit between joists.

You can make MOST of the cut with a saber saw, a circular saw, or a 'mini' reciprocating saw (Hacksall). The last 1" is hand & chisel work, though a multi-master might work.

Properly placed, your bridge will stick out enough to also support the edge of the hatch.
piplewis likes this.
KarenStein is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
access panel preventing basement bath conversion? rook81styles Remodeling 23 10-16-2014 05:42 PM
Wading through a flooded basement to access sump pump mj12 Electrical 9 03-21-2013 09:21 AM
Cutting out a concrete basement floor jeffhoward001 Building & Construction 21 01-17-2012 09:51 PM
Deck Access Hatch rman1953 Remodeling 7 07-11-2010 06:44 PM
Cutting through basement floor... Weekend Warrior DIY Building & Construction 11 11-19-2008 06:04 PM




Top of Page | View New Posts