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SPENCER RENTAL PRESENTS:
Floor sanding and refinishing. A step by step guide to help you
achieve professionally looking floors at a fraction of the cost.
Job Preparation is the first step in your floor sanding
job. It doesn't take a lot of time but it is very important. Line up people
to help you with the project. Remember, you will have to move furniture,
possibly remove old carpets, etc. and the sanding process is easier with two
When you are speaking with the rental store, ask for the cost to rent and
also the cost of sandpaper. Most stores will take a deposit on the sander,
edger and sandpaper and then charge the customer for the sandpaper that they
actually use while sanding. Check with the store on the cost of sandpaper,
per sheet, per disc,etc.
Speak with the rental store about floor finishes. Make it easier on yourself
by doing one stop shopping. If the rental store carries a top quality finish
buy it there instead of driving to another store for finish. If they sell
polyurethane you can buy the product when you return the machines. There are
a lot of manufacturers of finishes on the market, some are made specifically
for hardwood floors, some are not. Picking the proper finish will be
addressed later on.
The following is a list of items that you may need to complete your floor
Hammer, nailset and nails (6D or 8D)
Floor Sander and Floor Edger with 25'cord, bags and wrenches
Floor sanding abrasives: including sander sheets, edger discs,
screens, 9x11 sheets
Floor Polisher (13" or 17")
Top Quality Floor Finish
Finish applicator and brush
block sander or electric finish sander (fix spots, blend edges)
tack clothes (oil modified finish)
scraper for corners
safety equipment: dust masks, ear plugs, eye protection, etc.
Dustpan and Broom
Make sure these items are readily available to you before
you start your project.
After you have prepared yourself for the project, picked a
time to do the work and reserved the machines it is time to prepare the room
for the job. To save money and time, complete all the room preparations
before you pick up the rental equipment, make a list of the tools and
supplies that you will need and check it off before you start the project.
The people that are going to do the work should wear comfortable clothing
and non-marking shoes. Avoid black soles! You may want to wear a headband,
but above all be comfortable!
Remove all obstructions from the area to be sanded. This includes, but is
not limited to: furniture, drapes, pictures, wall hangings, breakables, etc.
Heating grates can be removed, or you can leave them in place until you are
sanding near them.
If you are sanding a room that had been covered by wall to wall carpet, it
is time to remove the carpet. This job takes some time so be sure you
allocate enough time and energy to tackle this. Pull up the carpet pad and
tackstrip and remove them from the area. Be careful with the tackstrip
Next, get on your hands and knees to inspect the floor for:
staples from the pad
nails from the tackstrip
nails protruding from the floor
Remove the staples and tackstrip nails. The floor nails
should be set and countersunk below the surface of the wood. At this time
you could also nail down squeaky floor boards, try to hit a joist if
Next you will want to protect the areas that are not being sanded from
sawdust. Sawdust is like water, it will always find its own level. The more
you do to prevent the spread of sawdust, the less sawdust there will be to
clean up. But, be aware that no matter how much you do, you'll always find
some sawdust at the end of the project. Tape off doors, cabinets, etc. with
plastic, or use old damp sheets (dust will stick to these) close adjoining
doors, open windows, etc. If your house has forced air heating system, plug
the vents in the work area to prevent circulation of the dust.
After these steps have been completed, sweep the floor and vacuum the whole
room. When your room prep is all done, go out and pick up the floor sanding
equipment, all abrasives and other supplies!
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When you return home from the rental store with the
equipment, take a moment to make a final inspection for nails, tacks, etc.
and remove any items from the area. Sweep the floor one last time and then
get ready to sand!
Before you start to sand your hardwood floors, it might be a good idea to
know just what you want to accomplish. Sanding is a process in which you cut
your floors with different abrasives to remove old finish, level the floor
and smooth out the wood to accept the new finish! The heavier grits make
deeper cuts into your floors and the successive lighter grits remove the
earlier scratch marks to make the hardwood floor ready to be finished with
your choice of coatings.
Sanding jobs can be completed in either 3 or 4 cuts with the different
abrasive grits. It depends on the condition of the floor being refinished.
New floors will not need as aggressive cuttings as a floor being sanded and
For reference (Sand & Refinish old floors):
The first cut is to remove the old finish and level the floor so it is flat
across the room, remove high and low spots. This will be the heaviest
sanding and will make heavy scratch marks. Most of the time sanding a room
can be completed with all grits with the grain of the wood. Most finishes
can be removed with the proper grit of sandpaper. Sanding your floor at a 45
degree angle to the grain should be a LAST RESORT!!!
The second cut is made to eliminate the roughness from the first cut, smooth
out the scratch marks and to remove any finish that may not have been
removed on the first cut.
The final cut is done to obtain a smooth finish when the coating is applied.
It also removes more of the remaining marks from the previous sandings.
For reference (Sand new floors):
The first cut is to level the floor. Although it is a new installation there
will still be unevenness. The wood mills cannot make each piece of wood the
same thickness, there are some variations. Of course, the leveling process
for a new floor is not nearly as aggressive as for an old floor. The
sandpaper grit used will be higher, so the marks to be removed will not be
as deep. You finish the sanding process in the same manner as with a
General sanding instructions.
Start your sanding using the lightest grit possible to achieve the objective
of the first cut, if a 36 grit will do the job then stay with it. If you
find the finish is not coming off, then go down to a 20 grit sheet. 20 grit
sheets will make heavier scratch marks and you'll have to do more sanding to
get your desired finish. We recommend a sanding process that includes: 20,
36, 60 and 100 grits.
Now that you know what you want to accomplish, start the
sanding. At the rental store pay attention to the person helping you. He or
she should show you the proper method for paper installation for the sander
and edger. The most common problem that renters encounter is incorrect
installation of paper on the sander drum.
Take the floor sander to the room to be sanded. Sanding will be done from
the right to the left. Locate an outlet in the room that will allow the cord
to be behind you as you sand. Before you put on any sandpaper or plug the
machine into the wall you may want to practice the movement of sanding.
Practice lowering the drum to the floor while you are moving forward and
also feathering the drum off the floor as you approach the wall. Do the same
practice motion as you would make the return cut.
Note: Some people will sand with the edger first
and then follow with the sander. The reason they do this is so the edger
casters are not rolling across the floor where the sander has already
finished its cut. They believe that the caster marks will show in the
finished floor, especially with a soft wood. Others use the sander first and
follow with the edger. The reason behind this was to sand the field of the
room to the desired level and then bring the edges to that same level. The
caster marks, if any would be removed with the screening process.
This page is going to follow the sander then
Tilt the floor sander back so you can install the paper (Remember, you only
need to turn the cams 1/4 turn in the correct direction to install the
paper). Once the paper is installed on the drum, tie the dustbag on the dust
tube elbow securely. The sander is designed so the drum does not touch the
floor until the user wants it to make contact. Look at the machine, it
should be resting on the back of the chassis. Plug in the sander to your
outlet. The sander runs on 14 amps, but we suggest you try to find a circuit
that is not overloaded. When you are ready to turn on the machine, put the
cord over your shoulder or make a loop and put it in your belt buckle, it
will help keep it out of your way as you do your return sanding. Put on your
earplugs and dustmask, you are going to sand the floor!
Note: Always unplug any sanding equipment before
you change abrasives. Then remember to plug them back in after the new
abrasive is installed
Note: If you trip a breaker or blow a fuse, turn
the equipment off. Then reset the breaker or replace the fuse.
Note: Remove all sawdust from the house as you
empty the dustbags. Empty you sander bags when they are 1/2 full. It will
help the dust pick up. Sawdust can be flammable and you do not want it in
When you sand a room with the floor sander you will do it in two sections.
Start the sanding with 2/3's of the room in front of you with the grain of
the wood. Sand this section of the room from right to left, overlapping the
previously cut path. Then turn around and sand the remaining 1/3
overlapping the two sections. Stagger the place where you lift the drum
off the floor to avoid stop marks where the two sections of the room meet.
Sand both forward and backward in the same path with the floor sander, just
like a professional floor sander. As you begin to move in either direction,
slowly lower the drum to the floor by lifting up on the handle. Remember to
be moving before you lower the drum. Keep constant upward pressure
on the handle to assure continuous contact between the floor and the drum. A
smooth feathering action with the drum and constant movement when the drum
is in contact with the floor will eliminate gouge marks. The backwards cut
will be your most aggressive and also the best for dust pick up. Never stop
moving the sander once it is in contact with the floor. Pay attention to
your position in relation to the wall you are sanding towards. Don't get to
close to the wall in front of you before you lift the drum, you may not get
the drum off the floor completely. Don't walk into the wall behind you as
you make your return cut, it will cause you to stop the drum in contact with
If the cutting action of your sander seems to slow or
diminish, it is probably time to change the sandpaper. In an effort to save
money, don't try to extend the life of the paper, replace it as needed. If
you hit a nail but the paper does not break, beware, there will be heavier
wear in the paper at the point where the nail hit. If you do not replace the
paper, there will be a mark in your floor because the grit on the sandpaper
was worn away.
Note: If you skimp on the amount of paper you use
on this project it will effect the end result. Don't look at the cost at the
time of sanding, but rather over the life of the floor. A $3.00 dollar sheet
of paper over a 10 year period is 30 cents a year. Replace abrasives to get
the same type of cut across the floor.
After you sand the field of the room with the floor sander it is time to
sand the edges with the floor edger. Unplug the floor sander and move it out
of your way, unless someone else is running it. Put the bag on the edger,
lay the edger on it's side and install the paper. Check to make sure the
edger on/off switch is OFF, and then plug the unit into the power.
Pick the edger up and rest it on the casters only, tilted back off the disc
pad. Turn on the edger and lower the pad to the floor. Moving from left to
right, level the floor from the area the floor sander has already sanded
towards the wall or baseboard. Move the edger in 12 to 18 inch sections and
then move over, always keep the edger moving, work in a semi-circular
motion. When you sand along a wall that the wood runs perpendicular to,
rotate the edger to the right on each board so you avoid sanding against the
Another method of edging is to sand from the wall or
baseboard to the area that has already been cut by the sander. In this
method you cut a line along the baseboard, and then sand out to the drum
area in 12 to 18" sections. In either method, move left to right.
Let the edger do the work, don't put extra pressure on the machine. Work at
a pace that you're comfortable with, and take frequent rests. If two people
are working together, the person running the edger is responsible to the
person running the sander in regards to the cords. Keep an eye on both sets
of cords so none get run over.
Sand the room with both the sander and the edger with all the required
grits. Don't try to skip grits to save time and money. Remember that the
process requires removal of previous scratch marks with successive cuts.
When the sanding is completed, it is time to do areas not reached by this
equipment. If you have baseboard heating, radiators or toekicks in the room
or rooms that you are sanding then you will need to sand under these
obstructions. Use the underadiator sander in these applications. It uses a
5" pressure sensitive disc (PSA) and will fit under these items because of
its elongated nose. Sand right to left with this unit and repeat all the
grits that were required with the other sanders. There is no dust retrieval
system so make sure you are wearing a dustmask.
When you're done with the electric floor sanding equipment,
it is time to scrape the corners and crevices of the room. The rental store
may rent or sell a good scrapper. Get on your hands and knees and scrape all
the corners. Keep the blade sharp as you scrape, especially when you must
sand against the grain of the wood. Don't forget to look for any areas that
the edger could not sand, around door casing and thresholds etc. Hand sand
the areas after you scrape them.
After you have sanded the floors and scraped the corners, look at the floor
one more time and check for errors. If you see drum marks, gouges or spots
with old finish, scrape these areas. After you scrape, hand sand these
When you're done with the sanding process, return the sanders. Rental stores
will charge for time out, not time used. When you return sanders, remember
to bring back:
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Before you begin coating a floor with any finish or stain,
you must thoroughly vacuum the room. This means the floors, walls, woodwork,
light switches, etc. Any surface can catch dust... let the dust settle and
After vacuuming you will tack the floor to remove any dust that was left by
the vacuum. You will want to use a tacking agent that is made with the
solvent used in the finish. If you are using a water based finish, use water
on a diaper, make the diaper damp, not wet. For an oil modified stain or
polyurethane use a premade tackcloth or a rag damp with paint thinner or
Staining a floor adds color and brings out a different look and texture to
the hardwood floor. There are many different colors of stains and choosing
one can be tricky. Color charts are helpful, but actual samples on your wood
gives a better indication of the final finish.
Follow the instructions of the manufacturer when applying stain. Take your
time, do not get ahead of yourself when in the staining process. Screening
the floor is critical if you plan to apply a stain to the wood. Stain will
highlight any imperfections from the sanding. After application, let the
stain dry. It will flash off quickly, but will not totally dry for 24-36
If you are not staining your hardwood floor, or if the stain has dried
completely, it is now time to apply your floor finish. There are several
types of hardwood floor coatings; waxes, lacquer sealers, Swedish finishes,
oil modified and water-based polyurethanes.
For the DIY floor refinisher there are only a couple of choices to consider,
either oil modified or water based polyurethane. These two urethane
finishes, have distinct advantages to the user and the final choice will be
based on personal preferences.
The following is a list of the difference between the oil modified and water
Oil Modified Poly:
Less expensive than water based
You should apply 3 coats
The finish provides traditional warm appearance
The finish will have a solvent odor when drying
Water based poly:
Quick Dry finish, more coats can be applied in one day
4 to 5 coats of finish for proper wear, more coats will
give a higher gloss
The finish provides a light appearance when applied
The finish will not yellow with age, dries crystal
Water Clean up
VOC Compliant MA, NY, NJ, CA
Review this information and then decide which type of
polyurethane you wish to apply. Once you know which type to use, be aware of
the difference between the many urethanes on the market. First and foremost,
select a top quality floor finish. Think of the cost of the good finish
extended over the life of the floor, not just at the time of purchase. The
money spent now will more than pay for itself over the next 10 to 15 years,
when properly maintained.
Note: If you pay
sixty to ninety dollars for finish it works out to six to nine dollars per
year for ten years of use.
There are very definite differences between cheaper polyurethane's and the
more expensive products. The old saying "You get what you pay for" is very
much evident when you see how easily the polyurethanes are applied and how
long they last on your floor. FabulonŽ products are your best bet. They are
designed for wood floors and are formulated with only the highest quality
polyurethane resins. Other products may state that they have a high solids
content, but they include fillers and other non-polyurethane resin items.
The key is Polyurethane resins, and FabulonŽ has an exceptionally high
polyurethane resin content. Apply this with confidence.
When you are going to apply the finish, the first step is proper stirring.
Do not shake the finish in the cans. This will cause problems with bubbles
in your finish. Stir your finish very well, and continually stir the
urethane as you use it to keep the body of the finish mixed.
Note: Remember to plan your coating process
so that you can leave the room by a door.
After the finish is prepared, cut in the edges with the 4"
brush. Cut in only the area that you can keep up with while applying the
finish with the applicator. Don't get ahead of yourself. The strip you cut
in should be 4 to 6 inches wide, make sure you apply enough finish to cover
the area completely.
Depending on the type of finish, there are certain types of finish
applicators. When applying water-based finishes you will use either a pad or
T-bar type applicator. Lambswool applicators are used with oil modified
Because of the different bases of these two popular finishes, there are
different practices for applying them. The following is an overview of the
two distinct applications.
Apply with the grain of the wood. Pour a line of urethane across the grain
of the wood, or dip the applicator in the finish and draw out the urethane
in a line. Using a lambswool applicator, spread the polyurethane following
the grain of the wood. You can push and pull the finish, as long as you make
the last pass over each area in the same direction. Apply an even, thin coat
without puddles or drops.
After a pass with the applicator, excess finish can be removed by rolling
the applicator in the next area to be coated. A top quality finish will be self leveling and easy
to apply. Avoid the bubbles that can result from "working the finish" too
much. You should check the area that has just been finished for puddles,
missed areas, etc. before you begin the next area. Once you are satisfied
that the area is complete, cut in the next area and apply the finish. Make
sure to overlap the areas completed and keep the last applicator movements
in the same direction.
Note: Keeping the last strokes with your
applicators in the same direction is even more important when you apply a
satin finish. The dulling agents in this finish must be applied in the
same direction to keep the sheen the same throughout your project.
With a water based finish you pull the applicator when applying the finish.
Pour a line of finish on the floor, following the grain. Then pull the
applicator like a squeegee plowing the finish to the end of the room. The
applicator should be positioned with a slight angle so the urethane flows
into the next area to be coated, and not back into the area just completed.
This can be tricky, FabulonŽ Products has made a video on the application of
water borne finishes, watch it. If you don't want to use the "T" bar
applicator then a 9" pad painter can be used.
Unlike the "T" bar, you apply the finish in a fashion like the 10" lambswool
applicator. Cut in your edges and apply the finish with the applicator.
Remember to overlap the finish and to be careful of missing spots. Water
based finishes are designed to be used in many thin coats.
The advantage of the drying time will be effected if you apply it too
Note: Many professional floor refinishers will
apply a coat of Super Gloss finish as their first layer, no matter what
the final desired finish. This is believed to be the best base coat, and
it is true that the final coat will determine the final sheen. A coat of
satin over two coats of Super Gloss will dull the sheen to a satin finish.
Most manufacturers do not recommend thinning out their products for the
first coat, they do manufacture some type of sealer.
With either type of finish, Do Not Stop the applicator in the finish as
you apply it. Feather the applicator in and out of the urethane.
Once the whole area is coated, you must close it off until
the finish dries. Be sure to keep animals off the floor as it dries. Close
the doors, put up "Keep Off" signs, etc. Let the urethane dry thoroughly
before you attempt to recoat the room. A water based finish should dry in 2
to 4 hours, and the oil modified finishes can dry in 4 to 8 hours, the more
fillers, etc. will effect the dry time, making it longer. Read the can for
After the first coat dries you must prepare for the next coat. If you are
using a water based urethane, you just recoat the floor. Unlike the previous
coat, on bare wood it will be harder to see areas that need their second
coat. Use the wood as a guide and take your time. Some refinishers will put
pieces of masking tape along the baseboard to keep track of where they are
on the floor.
If you are using the oil modified finish then there is another step to
complete before you apply any more finish. You must screen the floor. This
time the process will remove any grain raise resulting from the application
When you screen the finish it should powder up. If you do not get a powder,
then the finish is not sufficiently dry. Stop and wait for the finish to
dry. You will screen your floor with a buffer like before, but at a much
faster rate. Again screen with the grain of the room, outside edge first and
then the body. For screening between coats you can use a new 150 or 180 grit
screen or a used screen you saved from the original screening. Be careful
not to remove the finish you just applied.
Note: If you do not want to rent the buffer at
this point, you can use a pole sander with the proper grits of sandscreens
to achieve the same result. The rental store should have the proper
screens and may rent a pole sander.
After you screen your finish, you must vacuum and tack rag
the whole room. When this is completed you will apply your next coat of
finish in the same manner as the previous coat. You will screen the floor
between all the coats when applying oil modified finish. When you apply the
water borne finish you will not screen after the first coat, as with oil
modified finish, but you will screen between the following coats. Repeat
this process until you have applied the recommended number of coats for the
Note: Always follow the instructions provided
by the manufacturer of the product.
When you are done with applying the finish, it is time to let
the urethane dry or cure. In 2 to 3 days most urethanes should be dry enough
to place the furniture back into the room. It is
recommended to purchase furniture pads and use them on the legs of any and
all furniture. You must wait at least 10 to 14 full days before you place
any area rugs on the floor. The urethane will fully cure in 14 to 21 days.
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